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ANATOMY OF TRACHEOBRONCHIAL
TREE AND ITS IMPORTANCE FOR
ANAESTHESIOLOGIST
              By::Dr. HUNNY
              NARULA

              Moderator::Dr.
              Kanchan Chauhan
TRACHEA
 The tracheobronchial tree and the lung parenchyma comprise

  the lower respiratory tract.

 Trachea is a midline structure that extends from lower end of

  cricoid cartilage at level of C6 vertebra to its termination at
  bronchial bifurcation.

 In preserved dissected room cadever : At level of T4 vertebrae

 Living subject in erect position : Extends to level of upper border

  of 5th thoracic vertebrae or in full inspiration upto 6th thoracic
  vertebrae.
 Comprises 16-20 C shaped cartilage rings, cartilages are
  joined vertically by fibroelastic tissue and closed posteriorly by
  non striated trachealis muscle
 Adult

   Length 10-12cm.
       Diameter 15-20mm.
 Children : Trachea is smaller, deeply placed and more
  mobile.
 1 st post natal year – Diameter doesn’t exceed 4 mm

 During later child hood : Diameter in mm is approx. equal
  to age in years.
EMBRYOLOGY
Formation of lung bud takes place
   When    embryo is approx. 4 wk old & it (Respiratory
    diverticulum, lung bud) appears as an outgrowth from ventral
    wall of foregut

 Initially lung bud communicates with foregut. When diverticulum

  expands caudally, 2 longitudinal ridges (k/a tracheoesophageal
  ridges) separate it from foregut. These ridges subsequently fuse
  to form Tracheoseophageal septum. Foregut is divided into
  dorsal portion to form oesophagus and ventral portion to form
  trachea and lung buds. During its separation from foregut, lung
  bud form the trachea and 2 lateral outpocketings, the bronchial
  buds.
 At beginning of 5th wk, each of these buds enlarge to form
Contd.. And
  Rt.         Lt. main bronchi.
 Rt. then form 3 secondary bronchi and Lt. two, for 3 lobes

  of Rt. And 2 for Lt. respectively.



 Epithelium and internal lining – endodermal origin

 Cartilagenous,       muscular   and   connective   tissue   –
  splanchnic mesoderm surrounding the foregut
TRACHEOBRONCHIAL
     TREE
   ANATOMY
 Trachea divides into right- and left- primary main bronchi.
  Each further divides into lobar bronchi which in turn give rise to
  segmental bronchi-supply air to bronchopulmonary
  segments.
 Segmental bronchi divide dichotomously, eventually giving rise to
  terminal bronchioles which further terminates into respiratory
  bronchioles.
 Originating from each respiratory bronchioles are 2-11 alveolar
  ducts leading to the alveolar sacs which are extended as a
  group of alveoli.
 Airway becomes progressively narrower, shorter and more
  numerous, and Cross sectional area, enlarges.
 Areas of tracheobronchial tree furthest from the trachea are

  collectively called the "distal respiratory tree"
BRONCHOSCOPIC VIEW SHOWING CARINA
AND LEFT & RIGHT BRONCHUS (MORE
VERTICAL).
RIGHT MAIN BRONCHUS


 The right main bronchus is 2 cm long on average
  and has an internal diameter of 10-16 mm. This is
  slightly larger than the diameter of the left main
  bronchus.
 The bronchus intermedius of the right bronchial tree
  is actually quite short ,extending for 1.0-2.5 cm until
  its anterior wall extends into and becomes the
  middle lobe bronchus. Its posterior wall extends into
  and becomes the right lower lobe bronchus.
 Volume loss caused by pleural
  effusion, atelectasis, elevated right
  hemidiaphragm, as well as traction or torsion
  from a fibrotic or scarred upper lobe often cause
 The RIGHT UPPER LOBE BRONCHUS
    divides into (3)
a. The apical bronchus
b. The anterior bronchus
c.    The posterior bronchus
 Distally just beyond the bronchus
   intermedius, another division occurs into :
 The MIDDLE LOBE BRONCHUS with its anterior
   direction, dividing into(2)
 a).medial and
 b).lateral segmental bronchus.
The RIGHT LOWER LOBE BRONCHUS(5)
 The right lower lobe bronchus divides immediately
  into a a).superior segmental bronchus(jsut across
  from the right middle          lobebronchus), and
   b).medial basal segmental bronchus
    a bit more distally and along its medial wall.
 Finally dividing into three lower lobe bronchi
 (Three musketeers):
  c).Antero-basal
  d).Latero-basal
  e).Postero-basal
Right upper lobe bronchus and bronchus
  intermedius (sec. carinas)




•The carina dividing the   right upper lobe from the bronchus
intermedius is called the right carina 1 or RC-1.
•On the right, the carina between the right middle lobe
bronchus and the bronchus to the right lower lobe is
named the right carina2 or RC-2.
Bronchus intermedius and right lower
lobe bronchus
LEFT MAIN BRONCHUS
 The left main bronchus is usually 4-5cm
  long(Rt. 2cm long).Its lumen is narrower and
  relatively horizontal. The usual length of the left
  lower lobe bronchus beyond the origin of the
  superior segmental bronchus is 1cm.
 Divides into : (2)
      a).upper and
      b).lower lobe bronchus.
 The UPPER LOBE BRONCHUS divides into :
 a). Upper division(3)        Apical
                               Posterior
                               Anterior


 b).Lingular bronchus(2)   Superior
                           div.
                                      inferior div.

 The LOWER LOBE BRONCHUS(4):
                                       Apical
                                       Ant.basal

                                       Post basal

                                        Lat basal
                                       Med basal
Left upper lobe bronchus:
Upper division and Lingula

                       LC-1




    LC-2
Contd…                        TRACHEA


          Rt. Main bronchus                      Lt. Main bronchus



                   Middle
Superior lobar                   Inf. Lobar Sup. Lobar                 Inf. Lobar
                    lobar
Bronchus(3)                     bronchus(5 bronchus(5                 bronchus(4
                 bronchus(2
                                       )         )                           )
                      )


                               • Superior        • Apical
  • Apical       • Lateral                                              •Apical
                               •Medial basal     •Posterior
  • Posterior    • Medial                                               •Ant basal
                               • Ant. Basal      • Anterior
  •Anterior                                                             •Lat basal
                               • Post basal      •Superior lingular
                                                                        •Post basal
                               • Lateral basal   •Inferior lingular
VASCULAR SUPPLY OF TRACHEA AND
   BRONCHI
 Arterial supply : Upper 2/3 - Inferior thyroid artery

                 Lower 1/3 – Bronchial artery

 Venous supply : Inferior thyroid vein

 Lymphatic : drain into Deep cervical, pretracheal, paratracheal LN.

 Nerve supply : RLN with sympathetic fibres from middle cervical ganglion

 Bronchial arteries :
    Rt. Bronchial artery - branch of 3rd posterior intercoastal artery.

    2 Lt. bronchial arteries – branch of thoracic aorta.

 Bronchial vein communicates with pulmonary vein.
    Rt. Side  Azygous vein

    Lt. Side  Accessory hemiazygous vein
LINING EPITHELIUM

Trachea        Terminal bronchioles:
 ciliated psuedo stratified columnar epithelium


Respiratory bronchioles        alveolar ducts     alveoli:
 non ciliated cuboidal epithelium
Bronchopulmonary semgments
         RIGHT(10     LEFT
              )


          3         3+2




              2
                             4
     5
TRACHEOBRONCHIAL
      TREE
     CLINICAL
   RELEVANCE
ANGLE OF MAIN BRONCHI

      A).                       B).



                                  Rt            Lt
      RIGHT            LEFT
                  45
              2                       45
                                           45
              5



•A). In Adults: Hence more chances of rt bronchial intubation
•B). In Children (under the age of 3yrs the angulation
of the two main bronchi at the carina is equal on both
sides.)
Some more..


 The presence of 5cm of bronchial lumen
  uninterrupted by any branching makes the left
  main bronchus particularly suitable for intubation
  and blocking during thoracic surgery.

 The patency of the rt middle lobe bronchus is
  particularly vulnerable to glandular swelling
  because it is closely related to the right
  tracheobronchial groups of glands.
Relationship B/W Posture And The
Focal Incidence Of Lung Abcess
    Patient Lying On Side: inhaled materials collect
    in posterior segment of right upper lobe.

    Patient lying on back: inhaled materials collect
    in apical segment of right lower lobe.

   Bronchopulmonary segments are functionally
    and anatomically distinct from each other -
    which matters because a segment of diseased
    lung can be removed surgically without
    adversely affecting the rest of the lung.
PDT(POSITIONING)
TRACHEOSTOMY
 creation of permanent or semi permanent
  opening(surgical airway) in the anterior wall of trachea.
  Also k/a tracheotomy, laryngotomy, pharyngotomy.

 If a cannula is in place, an unsutured
opening heals into a patent stoma within
a week. If decannulation is performed
(ie, the tracheostomy cannula is removed),
the hole usually closes in a similar amount
of time.
Indications:
 In The Acute Setting, indications for tracheotomy
  include such conditions as severe facial trauma, head
  and neck cancers, large congenital tumors of the
  head and neck (e.g., branchial cleft cyst), and
  acute angioedema and inflammation of the head and
  neck.
   In the context of failed orotracheal or nasotracheal
  intubation, either tracheotomy orcricothyrotomy may
  be performed.
 In The Chronic Setting, indications for tracheotomy
  include the need for long-term mechanical ventilation
  and tracheal toilet (e.g. comatose patients, or
  extensive surgery involving the head and neck).
 In extreme cases, the procedure may be indicated as
  a treatment for severe Obstructive Sleep Apnea seen
  in patients intolerant of Continuous Positive Airway
  Pressure (CPAP) therapy.
Elective tracheostomy:
Anaesthesia: GA
Position: dorsal recumbent with sand bag under the shoulder.
Incision: horizontal incision 1 finger breadth above supra sternal
      notch parallel to it from one SCM to opp. side or vertical
      incision in midline extending from cricoid cartilage to
      suprasternal notch.
Division /retraction of thyroid isthmus thus exposing 3rd & 4th
      tracheal rings.
Opening of Trachea and insertion of tube.
Emergency Tracheostomy:
Within 2-4 mins with vertical incision.
Cricothyrotomy/mini tracheostomy:
Transverse incision over the cricothyroid membrane. Kept only for
    3-5 days,to be replaced with standard tubes after patient’s
    stabilization..
Peadiatric tracheostomy
 Vertical incision in trachea b/w 2nd and 3rd ring.
 No excision of ant. Wall of trachea.
 Secure the tube with neck by two sutures.



Percutaneous dilatational tracheostomy
 Percutaneous dilatational tracheostomy (PDT) has become a
    commonly performed procedure in the intensive care unit (ICU) in
    those patients subjected to prolonged mechanical ventilation.
   It has largely replaced the conventional surgical tracheostomy in
    critical care patients, with benefits in terms of cost, ease of
    performance, and reduced complications.
   Use of guide wire and Dilators.
   Under the vision of Bronchoscope through endotracheal tube.
   Not suitable for thick neck and in emergency.
   Significant complications associated with PDT, including
    haemorrhage, pneumothorax, and paratracheal placement, have
    ranged in various series from 3 to 18%
PERCUTANEOUS DILATATIONAL
TRACHEOSTOMY
LANDMARKS

Daigram showing anterior
structures of neck
PROCEDURE:




             Cricoid cartilage is palpated and local
             anaesthetic infilterated,Solutions containing
             adrenaline may be used to decrease
             bleeding at the incision site.




               Horizontal incision is made at chosen
               insertion site of sufficient size to accept
               a tracheostomy tube(say about 1.5 to
               2cm). At this stage it may be of benefit
               to perform an exploratory blunt
               dissection(keeping in midline) to
               identify the anatomical landmarks.
A 14G needle and cannula(with
syringe attached) is inserted in the
midline in a caudal direction(to avoid
the likelihood of the guidewire being
passed into pharynx.). The needle is
advanced until free withdrawal of air
into the syringe confirms the entry of
the needle and the cannula into the
trachea.this may be facilitated by
using fluid filled syringe,allowing
visualization of withdrawn air
bubbles. some secretions & mucus
may be aspirated during this
process,which is normal.
 The guide wire introducer is
 eased out from its sheath & the
 “J” tip is straigthened ,the
 introducer is inserted into the
 cannula & the guidewire is
 advanced into the trachea
Immediately prior to insertion, the
     distal end of the “single stage”
     dilator, “rhino horn” is immersed in
     water or saline to act as the
     lubricious coating on the dilator. The
     dilator is passed over the guiding
     catheter until it reaches the “safety
     stop”.




The lubricated tracheostomy tube is inserted
loaded on its lubricated introducer over the
guiding catheter through the stoma with a slight
twisting motion.The cuff of the tube is inflated
and the tube secured using sutures &/or cotton
straps.
 Types of PCT :

   Ciaglia technique
   Grigg’s technique
   Blue rhino / Rhino horn technique
   Fantony’s technique
   Perc twist technique

 Surgical Tracheostomy preferable to PCT in the
    following situations:

 Coagulation abnormality
 High level of ventilatory support (FiO2 >.7 & PEEP
    > 10 cm H2O)
   Unstable / Fragile cervical spine
   Neck injury
   Unfavorable neck anatomy (previous surgery, tumor
    etc.)
   Obesity
AIRWAY
HYPERREACTIVITY
AND
PERIOPERATIVE
BRONCHOSPASM
 A mild tonic constriction exists in all normal human airways. Mainly
  maintained by the efferent vagal activity .
 In some individuals, intense bronchoconstriction is provoked
  following airway stimulation with low level of stimulus as compared
  to normal persons. This bronchial hyperresponsiveness is termed
  “Reactive Airways”.
 BRONCHOSPASM, the clinical feature of exacerbated underlying
  airway hyperreactivity, is characterized by abnormal bronchial
  smooth muscle contraction leading to narrowing of respiratory
  airways. During the perioperative period, bronchospasm usually
  arises during induction of anesthesia but may also be detected at
  any stage of the anesthetic course.
 The commonest disease condition that falls into this entity is
  bronchial asthma. Others include ::chronic
  bronchitis, emphysema, allergic rhinitis and upper/lower respiratory
  tract infections. This category of patients constitutes a problem to
  the anaesthetist especially when the airway has to be tempered
  with.
 Often, precise testing is not practicable preoperatively and
   clinicians have to rely on history to identify factors suggesting an
   increased likelihood for perioperative bronchospasm.
 One of the most important is history of recent upper respiratory
   tract infection characterized by cough and fever. Respiratory
   symptoms like nocturnal dyspnoea, chest tightness on
   awakening, associated breathlessness and wheezing in
   response to various respiratory irritants, appear highly predictive
   of increased bronchial reactivity
 Bronchospasm encountered during the perioperative period and
   especially after induction/intubation may involve
 a)an immediate hypersensitivity reaction including IgE-mediated
   anaphylaxis or
 b).a nonallergic mechanism triggered by factors such as
   mechanical (i.e., intubation-induced bronchospasm) or
   pharmacologic-induced (via histamine-releasing drugs such as
   atracurium or mivacurium) bronchoconstriction in patients with
   uncontrolled underlying airway hyperreactivity.
 Intraoperatively bronchospasm is diagnosed
 by ventillatory difficulties characterized by:
     Difficult mask ventillation.
      Increased peak airway pressure.
      Expiratory wheezing.
      Decreased or absent breath sounds.
      ETco2 demonstrated a marked prolonged expiratory
 upstroke of the capnogram.
       Low concentrations of EtCO2.
     Desaturation.
     Hypotension.
Management:
 The key to therapy is inhalation of sympathomimetics such as
  albuterol. These drugs produce more rapid and effective
  bronchodilation than intravenous aminophylline. The beta-
  adrenergic aerosols like salbutamol, when inhaled before
  induction of anaesthesia prevents bronchospasm.
 Intravenous lignocaine (1.5–2 mg/kg), hydrocortisone (4 mg/kg)
  or glycopyrrolate (1 mg) may also help in reversing the reflex
  response to bronchoconstriction.
  Glycopyroolate may also be administered directly through the
  endotracheal tube. These dugs are likely to be more effective
  before the stimulus.
  Lignocaine has been shown to prevent such bronchospasm by
  blockade of the airway response to irritation and direct
  attenuation of smooth muscle response to irritation. Its use could
  therefore be employed when endotracheal intubation and some
  drugs likely to trigger bronchospasm are indicated.
 Inhalational anaesthetic agents like halothane produce
  bronchodilatation & if inhalation anaesthesia is indicated, it
  has been considered the agent of choice; but its
  myocardial depressant and arrhythmic effects in the
  presence of catecholamines may limit its use. At high MAC
  (>1.5), both enflurane and isoflurane prevent vagally
  mediated bronchospasm. These agents could hence be
  considered useful for inhalation anaesthesia in the
  asthmatics. However in 1997, Rooke et al observed
  clinically in humans that sevoflurane at 1.1 MAC may be
  more efficacious than both iso- and enflurane.
Differential diagnosis:
 The differential diagnosis includes:
 inadequate anesthesia,
 mucous plugging of the airway,
 esophageal intubation,
 kinked or obstructed tube/circuit, and pulmonary
  aspiration.
 Unilateral wheezing suggests endobronchial intubation or
  an obstructed tube by a foreign body (such as a tooth).
 If the clinical symptoms fail to resolve despite appropriate
  therapy, other etiologies such as pulmonary edema or
  pneumothorax should also be considered.
Congenital
 anomalies:
tracheoesophageal
 fistula
 Seen in 1:4000 live births.
 M:F::25:3
 10-40% are pre-term
 Ass. with polyhydramnios(60%)
    Embryology:
   Derived from primitive foregut
    4th week of gestation tracheoesophageal diverticulum forms
    from the laryngotracheal groove
    Tracheoesophageal septum develops during 4th-5thweeks –
    muscular + submucosal layer of T + E formed
   Elongates with descent of heart and lung
    7thweek reaches final length
CLINICAL PRESENTATION:
 Choking on 1st feed
 Drooling of saliva
 Coughing
 Cyanosis
 Aspiration pnuemonia
 Associated anomalies:VACTRAL anomalies in 35-65%

DIAGNOSIS:
Antenatal: In ultrasound polyhydramnios, distended stomach
Immediately after birth: Inability to pass suction catheter into the
  stomach.
CXR: coiled orogastric tube in the cervical pouch; air in the
  stomach & intestine
PREOPERATIVE PREPARATION
2 OBJECTIVES:
1.Minimize pulmonary complications (resulting from gastric
  acid reflux into pulmonary system)
  NPO, head up position, sump tube on low continuous
  suction, gastrostomy under LA
2.Manage dehydration & electrolyte imbalance


                             CONVENTIONAL TEF
OPERATIVE MANAGEMENT         CLOSURE

                              ENDOSCOPIC TEF
                              REPAIR
ANAESTHETIC MANAGEMENT:
THREE APPROACHES:
1. Induction with inhalational agent+ topical spray+
   spontaneously breathing infant+ intubation
2. Iv or inhalational induction+ muscle paralysis+ intubation
3. Intubation in sedated awake neonates
ASSESSMENT OF ETT POSITION:
GOAL:ETT just above the carina & just below the fistula
  Rt. main stem intubation & withdraw ETT until breath sounds
   are equal bilateral.
(Lt. main stem bronchial intubation is poorly tolerated d/t insufficient
      pulmonary reserve.)
contd:
 If g tube present, place the end under water seal:ETT is above
  fistula----(+)bubbles.
 Connect capnograph to g-tube: ETCO2 (+), if ETT is above the
  fistula
 Rigid bronchoscopy, not proven.
Beware of gastric distension
     give gentle positive pressure ventillation
     keep gastrostomy open, if present.
INTRAOPERATIVE PROBLEMS:
 Endobronchial intubation
 Intubation of fistula
 ETT obstruction
 V/Q mismatch
 Vagal response to tracheal manipulation
Post operative management
 EARLY EXTUBATION DESIRABLE
     Caution: disruption of surgical repair with reintubation
 POST OP PAIN MANAGEMENT:
1. Iv narcotics
2. Epidural infusion:0.1%bupivacaine+fentanyl 0.5mcg/ml
   @ 0.1-0.2ml/kg/hr
3. Rectal analgesic + LA infilteration of incision.
BRONCHOSCOPY
 INDICATIONS
 INSTRUMENTS OF CHOICE
 ANAESTHESIA FOR BRONCHOSCOPY
INDICATIONS:
DIAGNOSTIC                               THERAPEUTIC
   Cough                                   Foreign Bodies
   Hemoptysis                              Accumulated Secretions
   Wheez                                   Aspiration
   Atelectasis                             Lung abcess
   Unresolved pnuemonia                    Reposition endotracheal tubes
   Diffuse lung dis.                       Placement of endobronchial tubes
    PREOPERATIVE EVALUATION                 LASER surgery for airways.
   Rule out metastases
   RLN palsy
   Diaphragm paralysis
   Exclude tracheo esophageal fistula
   During mech ventillation
   Selective bronchography
   Abn. Chest radiograph
INSTRUMENTS OF CHOICE
RIGID                          FIBEROPTIC/FLEXIBLE
   Forein Body Removal           Mechanical problems of neck
   massive hemoptysis            Upper lobe &peripheral lesions
   Vascular tumors               Limited hemoptysis
   Small children                During mech ventillation
   Endobronchial resections      Pnuemonia for selective cultures
                                  Positioning of double lumen tubes
                                  Difficult intubation
                                  Cheking position of of ETT
                                  Bronchial blockade
Anaesthetic techniques:
LOCAL ANAESTHESIA:
 Pretreated with drying agent
 LA: lidocaine & tetracaine
 Oropharynx: nebulization or gargle
 LA soaked pledgets in pyriform fossa(int. branch of sup. LN)
 Tracheal anaesthesia: transtracheal inj. of LA or spraying of vocal
    cords under direct vision of laryngoscope
   Alternatively sup. LN block along with glossopharyngeal N. block to
    depress gag reflex
   Blocks blunt patients reflexes: pt. must be NPO for several hours
    after examination
   Advantages: awake cooperative spontaneously breathing patient
   Disadv.: poor tolerance to bleeding, occasional lack of cooperation
GENERAL ANAESTHESIA:
1.   APNEIC OXYGENATION:
    Preoxygenation+ induction+ skeletal muscle paralysis+ cessation
     of IPPV       increase in PCO2
    1st minute: increase is approx. 6mmHg
    Subsequently @ 3mmHg/min.
    Oxygen insufflated at 10-15ml/min
    Apneic period should not extend beyond 5mins
    Technique is limited by build up of CO2,respiratory
     acidosis, cardiac dysrrhythmias
2.   APNOEA & INTERMITTENT VENTILLATION
    Oxygen & anaesthesia gases delivered to bronchoscope via
     anaesthesia circuit
    Ventilation possible only when eyepiece is in place,limits
     interventional period by surgeon
    Disadv: leak around the bronchoscope
3. SANDER’S INJECTION SYSTEM:
 Oxygen from high pressure source(50 psig),using controllable
     using pressure reducing valve & toggle switch to a 18-16G needle
     inside & parallel to the long axis of the bronchoscope.
    Pressing the toggle switch jet of oxygen entraining the room air &
     O2-air mixture emerges at a pressure to provide adequate
     ventilation & oxygenation
    Intraluminal tracheal pressure depends upon: driving pressure from
     reducing valve, the size of needle jet, & the length, int. diameter &
     the design of bronchoscope.
    Pressure varies inversely with cross sectional area of the
     bronchoscope so insertion of catheter or biopsy forceps into the
     lumen causes the intra tracheal pressure to rise.
4.     HFPPV
5.     MECH VENTILLATION
PHYSIOLOGICAL CHANGES ASSOCIATED WITH
FIBEROPTIC BRONCHOSCOPY:
 In all patients: hypoxemia, average decline in Pao2 is 20mmHg &
    lasts for 1-2hrs.By 24hrs blood gases are back to normal.
   During or after bronchoscopy patients experience increased airway
    obstruction: inc FRC ,dec in PaO2, VC, Fev1& Forced inspiratory
    flow. all return to baseline by 24hrs.changes are secondary to
    activation of irritative reflexes or mucosal edema.
   If suction at 1atm is applied, air is removed @ 14L/min this causes
    dec in FiO2, PAO2, & FRC leading to dec PaO2,therefore suctioning
    should be kept brief.
   If fibroscopy is planned ETT of largest possible diameter should be
    used.
   Insertion leads to significant rise in PEEP, may cause barotrauma so
    if PEEP is already being used, it should be discontinued.
   With Nd-YAG LASERS FiO2 should be kept minimum & titrated
    against saturation, to reduce chances of catching endobronchial
    fire.
COMPLICATIONS:
 Trauma to teeth
 Hemorrhage
 Bronchospasm
 Perforation
 Subglottic edema
       In most cases, it is best to intubate the trachea with an ETT
    after bronchoscopy under general anaesthesia. This permits
    avoidance or treatment of some of these problems, particularly
    increased airway reactivity. It also facilitates suctioning and
    allows the patient more gradual recovery.
SMOKING CESSATION TIMELINE – THE HEALTH
    BENEFITS OVER TIME
 In 20 minutes, blood pressure and pulse rate decreases, and
    the body temperature of hands and feet increases.
   Carbon monoxide in cigarette smoke reduces the blood’s
    ability to carry oxygen. At 8 hours, the carbon monoxide level
    in blood decreases, With the decrease in carbon
    monoxide, blood oxygen level increases to normal.
   At 24 hours, risk of having a heart attack decreases.
   At 48 hours, nerve endings start to regrow and the ability to
    smell and taste is enhanced.
   Between 2 weeks and 3 months, circulation
    improves, walking becomes easier and coughing or wheezing
    is not as often. Phlegm production decreases. Within several
    months, there is significant improvement in lung function.
 In 1 to 9 months, coughs, sinus congestion, fatigue and
    shortness of breath decreases as there is continuous significant
    improvement in lung function. Cilia, tiny hair-like structures that
    move mucus out of the lungs, regain normal function.
   In 1 year, risk of coronary heart disease and heart attack is
    reduced to half that of a smoker.
   Between 5 and 15 years after quitting, risk of having a stroke
    returns to that of a non-smoker.
   In 10 years, risk of lung cancer drops. Additionally, risk of cancer
    of the mouth, throat, esophagus, bladder, kidney and pancreas
    decrease. Even after a decade of not smoking however, risk of
    lung cancer remains higher than in people who have never
    smoked. Risk of ulcer also decreases.
   In 15 years, risk of coronary heart disease and heart attack in
    similar to that of people who have never smoked. The risk of
    death returns to nearly the level of a non-smoker.
POSTURAL
 DRAINAGE
 THERAPY
(POSITIONING)
HALF LYING




                     UPPER LOBE POSTERIOR SEGMENT
                     LEFT




RIGHT SIDE LYING,
45 DEGREE TURN
TOWARDS FACE SIDE,
THREE PILLOW
SUPINE LYING




FROM SUPINE 45 DEGREE
TURN TOWARDS RIGHT,
PILLOW FROM SHOULDER
TO HIP,
FOOT END RAISED 14”
FROM SUPINE 45DEGREE
                         TURN TOWARDS
                         LEFT, PILLOW FROM
                         SHOULDER TO HIP,
                         FOOT END RAISED 14”.




                              LOWER LOBE ANT.
                              BASAL SEGMENTS


SUPINE,
PILLOW UNDER HIP,
FOOT END 18” ELEVATED.
PRONE LYING,
                PILLOW UNDER HIP,
                FOOT END ELEVATED 18”.




CONTRALATERA
L SIDE LYING,
PILLOW BELOW
HIP,FOOT END
18” RAISED
PRONE LYING,
PILLOW UNDER HIP.
THANKS

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Anatomy and Clinical Importance of Tracheobronchial Tree

  • 1. ANATOMY OF TRACHEOBRONCHIAL TREE AND ITS IMPORTANCE FOR ANAESTHESIOLOGIST By::Dr. HUNNY NARULA Moderator::Dr. Kanchan Chauhan
  • 2. TRACHEA  The tracheobronchial tree and the lung parenchyma comprise the lower respiratory tract.  Trachea is a midline structure that extends from lower end of cricoid cartilage at level of C6 vertebra to its termination at bronchial bifurcation.  In preserved dissected room cadever : At level of T4 vertebrae  Living subject in erect position : Extends to level of upper border of 5th thoracic vertebrae or in full inspiration upto 6th thoracic vertebrae.  Comprises 16-20 C shaped cartilage rings, cartilages are joined vertically by fibroelastic tissue and closed posteriorly by non striated trachealis muscle
  • 3.  Adult  Length 10-12cm. Diameter 15-20mm.  Children : Trachea is smaller, deeply placed and more mobile.  1 st post natal year – Diameter doesn’t exceed 4 mm  During later child hood : Diameter in mm is approx. equal to age in years.
  • 4.
  • 6. Formation of lung bud takes place  When embryo is approx. 4 wk old & it (Respiratory diverticulum, lung bud) appears as an outgrowth from ventral wall of foregut  Initially lung bud communicates with foregut. When diverticulum expands caudally, 2 longitudinal ridges (k/a tracheoesophageal ridges) separate it from foregut. These ridges subsequently fuse to form Tracheoseophageal septum. Foregut is divided into dorsal portion to form oesophagus and ventral portion to form trachea and lung buds. During its separation from foregut, lung bud form the trachea and 2 lateral outpocketings, the bronchial buds.
  • 7.  At beginning of 5th wk, each of these buds enlarge to form Contd.. And Rt. Lt. main bronchi.  Rt. then form 3 secondary bronchi and Lt. two, for 3 lobes of Rt. And 2 for Lt. respectively.  Epithelium and internal lining – endodermal origin  Cartilagenous, muscular and connective tissue – splanchnic mesoderm surrounding the foregut
  • 8.
  • 9. TRACHEOBRONCHIAL TREE ANATOMY
  • 10.
  • 11.  Trachea divides into right- and left- primary main bronchi. Each further divides into lobar bronchi which in turn give rise to segmental bronchi-supply air to bronchopulmonary segments.  Segmental bronchi divide dichotomously, eventually giving rise to terminal bronchioles which further terminates into respiratory bronchioles.  Originating from each respiratory bronchioles are 2-11 alveolar ducts leading to the alveolar sacs which are extended as a group of alveoli.  Airway becomes progressively narrower, shorter and more numerous, and Cross sectional area, enlarges.  Areas of tracheobronchial tree furthest from the trachea are collectively called the "distal respiratory tree"
  • 12. BRONCHOSCOPIC VIEW SHOWING CARINA AND LEFT & RIGHT BRONCHUS (MORE VERTICAL).
  • 13. RIGHT MAIN BRONCHUS  The right main bronchus is 2 cm long on average and has an internal diameter of 10-16 mm. This is slightly larger than the diameter of the left main bronchus.  The bronchus intermedius of the right bronchial tree is actually quite short ,extending for 1.0-2.5 cm until its anterior wall extends into and becomes the middle lobe bronchus. Its posterior wall extends into and becomes the right lower lobe bronchus.  Volume loss caused by pleural effusion, atelectasis, elevated right hemidiaphragm, as well as traction or torsion from a fibrotic or scarred upper lobe often cause
  • 14.  The RIGHT UPPER LOBE BRONCHUS divides into (3) a. The apical bronchus b. The anterior bronchus c. The posterior bronchus  Distally just beyond the bronchus intermedius, another division occurs into :  The MIDDLE LOBE BRONCHUS with its anterior direction, dividing into(2) a).medial and b).lateral segmental bronchus.
  • 15. The RIGHT LOWER LOBE BRONCHUS(5)  The right lower lobe bronchus divides immediately into a a).superior segmental bronchus(jsut across from the right middle lobebronchus), and b).medial basal segmental bronchus a bit more distally and along its medial wall.  Finally dividing into three lower lobe bronchi (Three musketeers): c).Antero-basal d).Latero-basal e).Postero-basal
  • 16. Right upper lobe bronchus and bronchus intermedius (sec. carinas) •The carina dividing the right upper lobe from the bronchus intermedius is called the right carina 1 or RC-1. •On the right, the carina between the right middle lobe bronchus and the bronchus to the right lower lobe is named the right carina2 or RC-2.
  • 17. Bronchus intermedius and right lower lobe bronchus
  • 18. LEFT MAIN BRONCHUS  The left main bronchus is usually 4-5cm long(Rt. 2cm long).Its lumen is narrower and relatively horizontal. The usual length of the left lower lobe bronchus beyond the origin of the superior segmental bronchus is 1cm.  Divides into : (2)  a).upper and  b).lower lobe bronchus.
  • 19.  The UPPER LOBE BRONCHUS divides into : a). Upper division(3) Apical Posterior Anterior b).Lingular bronchus(2) Superior div. inferior div.  The LOWER LOBE BRONCHUS(4): Apical Ant.basal Post basal Lat basal Med basal
  • 20. Left upper lobe bronchus: Upper division and Lingula LC-1 LC-2
  • 21. Contd… TRACHEA Rt. Main bronchus Lt. Main bronchus Middle Superior lobar Inf. Lobar Sup. Lobar Inf. Lobar lobar Bronchus(3) bronchus(5 bronchus(5 bronchus(4 bronchus(2 ) ) ) ) • Superior • Apical • Apical • Lateral •Apical •Medial basal •Posterior • Posterior • Medial •Ant basal • Ant. Basal • Anterior •Anterior •Lat basal • Post basal •Superior lingular •Post basal • Lateral basal •Inferior lingular
  • 22. VASCULAR SUPPLY OF TRACHEA AND BRONCHI  Arterial supply : Upper 2/3 - Inferior thyroid artery Lower 1/3 – Bronchial artery  Venous supply : Inferior thyroid vein  Lymphatic : drain into Deep cervical, pretracheal, paratracheal LN.  Nerve supply : RLN with sympathetic fibres from middle cervical ganglion Bronchial arteries :  Rt. Bronchial artery - branch of 3rd posterior intercoastal artery.  2 Lt. bronchial arteries – branch of thoracic aorta. Bronchial vein communicates with pulmonary vein.  Rt. Side  Azygous vein  Lt. Side  Accessory hemiazygous vein
  • 23. LINING EPITHELIUM Trachea Terminal bronchioles: ciliated psuedo stratified columnar epithelium Respiratory bronchioles alveolar ducts alveoli: non ciliated cuboidal epithelium
  • 24. Bronchopulmonary semgments RIGHT(10 LEFT ) 3 3+2 2 4 5
  • 25.
  • 26. TRACHEOBRONCHIAL TREE CLINICAL RELEVANCE
  • 27. ANGLE OF MAIN BRONCHI A). B). Rt Lt RIGHT LEFT 45 2 45 45 5 •A). In Adults: Hence more chances of rt bronchial intubation •B). In Children (under the age of 3yrs the angulation of the two main bronchi at the carina is equal on both sides.)
  • 28. Some more..  The presence of 5cm of bronchial lumen uninterrupted by any branching makes the left main bronchus particularly suitable for intubation and blocking during thoracic surgery.  The patency of the rt middle lobe bronchus is particularly vulnerable to glandular swelling because it is closely related to the right tracheobronchial groups of glands.
  • 29. Relationship B/W Posture And The Focal Incidence Of Lung Abcess  Patient Lying On Side: inhaled materials collect in posterior segment of right upper lobe.  Patient lying on back: inhaled materials collect in apical segment of right lower lobe.  Bronchopulmonary segments are functionally and anatomically distinct from each other - which matters because a segment of diseased lung can be removed surgically without adversely affecting the rest of the lung.
  • 31. TRACHEOSTOMY  creation of permanent or semi permanent opening(surgical airway) in the anterior wall of trachea. Also k/a tracheotomy, laryngotomy, pharyngotomy.  If a cannula is in place, an unsutured opening heals into a patent stoma within a week. If decannulation is performed (ie, the tracheostomy cannula is removed), the hole usually closes in a similar amount of time.
  • 32. Indications:  In The Acute Setting, indications for tracheotomy include such conditions as severe facial trauma, head and neck cancers, large congenital tumors of the head and neck (e.g., branchial cleft cyst), and acute angioedema and inflammation of the head and neck. In the context of failed orotracheal or nasotracheal intubation, either tracheotomy orcricothyrotomy may be performed.  In The Chronic Setting, indications for tracheotomy include the need for long-term mechanical ventilation and tracheal toilet (e.g. comatose patients, or extensive surgery involving the head and neck).  In extreme cases, the procedure may be indicated as a treatment for severe Obstructive Sleep Apnea seen in patients intolerant of Continuous Positive Airway Pressure (CPAP) therapy.
  • 33. Elective tracheostomy: Anaesthesia: GA Position: dorsal recumbent with sand bag under the shoulder. Incision: horizontal incision 1 finger breadth above supra sternal notch parallel to it from one SCM to opp. side or vertical incision in midline extending from cricoid cartilage to suprasternal notch. Division /retraction of thyroid isthmus thus exposing 3rd & 4th tracheal rings. Opening of Trachea and insertion of tube. Emergency Tracheostomy: Within 2-4 mins with vertical incision. Cricothyrotomy/mini tracheostomy: Transverse incision over the cricothyroid membrane. Kept only for 3-5 days,to be replaced with standard tubes after patient’s stabilization..
  • 34. Peadiatric tracheostomy  Vertical incision in trachea b/w 2nd and 3rd ring.  No excision of ant. Wall of trachea.  Secure the tube with neck by two sutures. Percutaneous dilatational tracheostomy  Percutaneous dilatational tracheostomy (PDT) has become a commonly performed procedure in the intensive care unit (ICU) in those patients subjected to prolonged mechanical ventilation.  It has largely replaced the conventional surgical tracheostomy in critical care patients, with benefits in terms of cost, ease of performance, and reduced complications.  Use of guide wire and Dilators.  Under the vision of Bronchoscope through endotracheal tube.  Not suitable for thick neck and in emergency.  Significant complications associated with PDT, including haemorrhage, pneumothorax, and paratracheal placement, have ranged in various series from 3 to 18%
  • 36. PROCEDURE: Cricoid cartilage is palpated and local anaesthetic infilterated,Solutions containing adrenaline may be used to decrease bleeding at the incision site. Horizontal incision is made at chosen insertion site of sufficient size to accept a tracheostomy tube(say about 1.5 to 2cm). At this stage it may be of benefit to perform an exploratory blunt dissection(keeping in midline) to identify the anatomical landmarks.
  • 37. A 14G needle and cannula(with syringe attached) is inserted in the midline in a caudal direction(to avoid the likelihood of the guidewire being passed into pharynx.). The needle is advanced until free withdrawal of air into the syringe confirms the entry of the needle and the cannula into the trachea.this may be facilitated by using fluid filled syringe,allowing visualization of withdrawn air bubbles. some secretions & mucus may be aspirated during this process,which is normal. The guide wire introducer is eased out from its sheath & the “J” tip is straigthened ,the introducer is inserted into the cannula & the guidewire is advanced into the trachea
  • 38. Immediately prior to insertion, the distal end of the “single stage” dilator, “rhino horn” is immersed in water or saline to act as the lubricious coating on the dilator. The dilator is passed over the guiding catheter until it reaches the “safety stop”. The lubricated tracheostomy tube is inserted loaded on its lubricated introducer over the guiding catheter through the stoma with a slight twisting motion.The cuff of the tube is inflated and the tube secured using sutures &/or cotton straps.
  • 39.  Types of PCT :  Ciaglia technique  Grigg’s technique  Blue rhino / Rhino horn technique  Fantony’s technique  Perc twist technique  Surgical Tracheostomy preferable to PCT in the following situations:  Coagulation abnormality  High level of ventilatory support (FiO2 >.7 & PEEP > 10 cm H2O)  Unstable / Fragile cervical spine  Neck injury  Unfavorable neck anatomy (previous surgery, tumor etc.)  Obesity
  • 41.  A mild tonic constriction exists in all normal human airways. Mainly maintained by the efferent vagal activity .  In some individuals, intense bronchoconstriction is provoked following airway stimulation with low level of stimulus as compared to normal persons. This bronchial hyperresponsiveness is termed “Reactive Airways”.  BRONCHOSPASM, the clinical feature of exacerbated underlying airway hyperreactivity, is characterized by abnormal bronchial smooth muscle contraction leading to narrowing of respiratory airways. During the perioperative period, bronchospasm usually arises during induction of anesthesia but may also be detected at any stage of the anesthetic course.  The commonest disease condition that falls into this entity is bronchial asthma. Others include ::chronic bronchitis, emphysema, allergic rhinitis and upper/lower respiratory tract infections. This category of patients constitutes a problem to the anaesthetist especially when the airway has to be tempered with.
  • 42.  Often, precise testing is not practicable preoperatively and clinicians have to rely on history to identify factors suggesting an increased likelihood for perioperative bronchospasm.  One of the most important is history of recent upper respiratory tract infection characterized by cough and fever. Respiratory symptoms like nocturnal dyspnoea, chest tightness on awakening, associated breathlessness and wheezing in response to various respiratory irritants, appear highly predictive of increased bronchial reactivity  Bronchospasm encountered during the perioperative period and especially after induction/intubation may involve a)an immediate hypersensitivity reaction including IgE-mediated anaphylaxis or b).a nonallergic mechanism triggered by factors such as mechanical (i.e., intubation-induced bronchospasm) or pharmacologic-induced (via histamine-releasing drugs such as atracurium or mivacurium) bronchoconstriction in patients with uncontrolled underlying airway hyperreactivity.
  • 43.  Intraoperatively bronchospasm is diagnosed by ventillatory difficulties characterized by: Difficult mask ventillation. Increased peak airway pressure. Expiratory wheezing. Decreased or absent breath sounds. ETco2 demonstrated a marked prolonged expiratory upstroke of the capnogram. Low concentrations of EtCO2. Desaturation. Hypotension.
  • 44. Management:  The key to therapy is inhalation of sympathomimetics such as albuterol. These drugs produce more rapid and effective bronchodilation than intravenous aminophylline. The beta- adrenergic aerosols like salbutamol, when inhaled before induction of anaesthesia prevents bronchospasm.  Intravenous lignocaine (1.5–2 mg/kg), hydrocortisone (4 mg/kg) or glycopyrrolate (1 mg) may also help in reversing the reflex response to bronchoconstriction. Glycopyroolate may also be administered directly through the endotracheal tube. These dugs are likely to be more effective before the stimulus. Lignocaine has been shown to prevent such bronchospasm by blockade of the airway response to irritation and direct attenuation of smooth muscle response to irritation. Its use could therefore be employed when endotracheal intubation and some drugs likely to trigger bronchospasm are indicated.
  • 45.  Inhalational anaesthetic agents like halothane produce bronchodilatation & if inhalation anaesthesia is indicated, it has been considered the agent of choice; but its myocardial depressant and arrhythmic effects in the presence of catecholamines may limit its use. At high MAC (>1.5), both enflurane and isoflurane prevent vagally mediated bronchospasm. These agents could hence be considered useful for inhalation anaesthesia in the asthmatics. However in 1997, Rooke et al observed clinically in humans that sevoflurane at 1.1 MAC may be more efficacious than both iso- and enflurane.
  • 46. Differential diagnosis: The differential diagnosis includes:  inadequate anesthesia,  mucous plugging of the airway,  esophageal intubation,  kinked or obstructed tube/circuit, and pulmonary aspiration.  Unilateral wheezing suggests endobronchial intubation or an obstructed tube by a foreign body (such as a tooth).  If the clinical symptoms fail to resolve despite appropriate therapy, other etiologies such as pulmonary edema or pneumothorax should also be considered.
  • 48.  Seen in 1:4000 live births.  M:F::25:3  10-40% are pre-term  Ass. with polyhydramnios(60%) Embryology:  Derived from primitive foregut  4th week of gestation tracheoesophageal diverticulum forms from the laryngotracheal groove  Tracheoesophageal septum develops during 4th-5thweeks – muscular + submucosal layer of T + E formed  Elongates with descent of heart and lung  7thweek reaches final length
  • 49.
  • 50. CLINICAL PRESENTATION:  Choking on 1st feed  Drooling of saliva  Coughing  Cyanosis  Aspiration pnuemonia  Associated anomalies:VACTRAL anomalies in 35-65% DIAGNOSIS: Antenatal: In ultrasound polyhydramnios, distended stomach Immediately after birth: Inability to pass suction catheter into the stomach. CXR: coiled orogastric tube in the cervical pouch; air in the stomach & intestine
  • 51. PREOPERATIVE PREPARATION 2 OBJECTIVES: 1.Minimize pulmonary complications (resulting from gastric acid reflux into pulmonary system) NPO, head up position, sump tube on low continuous suction, gastrostomy under LA 2.Manage dehydration & electrolyte imbalance CONVENTIONAL TEF OPERATIVE MANAGEMENT CLOSURE ENDOSCOPIC TEF REPAIR
  • 52. ANAESTHETIC MANAGEMENT: THREE APPROACHES: 1. Induction with inhalational agent+ topical spray+ spontaneously breathing infant+ intubation 2. Iv or inhalational induction+ muscle paralysis+ intubation 3. Intubation in sedated awake neonates ASSESSMENT OF ETT POSITION: GOAL:ETT just above the carina & just below the fistula  Rt. main stem intubation & withdraw ETT until breath sounds are equal bilateral. (Lt. main stem bronchial intubation is poorly tolerated d/t insufficient pulmonary reserve.)
  • 53. contd:  If g tube present, place the end under water seal:ETT is above fistula----(+)bubbles.  Connect capnograph to g-tube: ETCO2 (+), if ETT is above the fistula  Rigid bronchoscopy, not proven. Beware of gastric distension give gentle positive pressure ventillation keep gastrostomy open, if present. INTRAOPERATIVE PROBLEMS:  Endobronchial intubation  Intubation of fistula  ETT obstruction  V/Q mismatch  Vagal response to tracheal manipulation
  • 54. Post operative management  EARLY EXTUBATION DESIRABLE Caution: disruption of surgical repair with reintubation  POST OP PAIN MANAGEMENT: 1. Iv narcotics 2. Epidural infusion:0.1%bupivacaine+fentanyl 0.5mcg/ml @ 0.1-0.2ml/kg/hr 3. Rectal analgesic + LA infilteration of incision.
  • 55. BRONCHOSCOPY  INDICATIONS  INSTRUMENTS OF CHOICE  ANAESTHESIA FOR BRONCHOSCOPY
  • 56. INDICATIONS: DIAGNOSTIC THERAPEUTIC  Cough  Foreign Bodies  Hemoptysis  Accumulated Secretions  Wheez  Aspiration  Atelectasis  Lung abcess  Unresolved pnuemonia  Reposition endotracheal tubes  Diffuse lung dis.  Placement of endobronchial tubes PREOPERATIVE EVALUATION  LASER surgery for airways.  Rule out metastases  RLN palsy  Diaphragm paralysis  Exclude tracheo esophageal fistula  During mech ventillation  Selective bronchography  Abn. Chest radiograph
  • 57. INSTRUMENTS OF CHOICE RIGID FIBEROPTIC/FLEXIBLE  Forein Body Removal  Mechanical problems of neck  massive hemoptysis  Upper lobe &peripheral lesions  Vascular tumors  Limited hemoptysis  Small children  During mech ventillation  Endobronchial resections  Pnuemonia for selective cultures  Positioning of double lumen tubes  Difficult intubation  Cheking position of of ETT  Bronchial blockade
  • 58. Anaesthetic techniques: LOCAL ANAESTHESIA:  Pretreated with drying agent  LA: lidocaine & tetracaine  Oropharynx: nebulization or gargle  LA soaked pledgets in pyriform fossa(int. branch of sup. LN)  Tracheal anaesthesia: transtracheal inj. of LA or spraying of vocal cords under direct vision of laryngoscope  Alternatively sup. LN block along with glossopharyngeal N. block to depress gag reflex  Blocks blunt patients reflexes: pt. must be NPO for several hours after examination  Advantages: awake cooperative spontaneously breathing patient  Disadv.: poor tolerance to bleeding, occasional lack of cooperation
  • 59. GENERAL ANAESTHESIA: 1. APNEIC OXYGENATION:  Preoxygenation+ induction+ skeletal muscle paralysis+ cessation of IPPV increase in PCO2  1st minute: increase is approx. 6mmHg  Subsequently @ 3mmHg/min.  Oxygen insufflated at 10-15ml/min  Apneic period should not extend beyond 5mins  Technique is limited by build up of CO2,respiratory acidosis, cardiac dysrrhythmias 2. APNOEA & INTERMITTENT VENTILLATION  Oxygen & anaesthesia gases delivered to bronchoscope via anaesthesia circuit  Ventilation possible only when eyepiece is in place,limits interventional period by surgeon  Disadv: leak around the bronchoscope
  • 60. 3. SANDER’S INJECTION SYSTEM:  Oxygen from high pressure source(50 psig),using controllable using pressure reducing valve & toggle switch to a 18-16G needle inside & parallel to the long axis of the bronchoscope.  Pressing the toggle switch jet of oxygen entraining the room air & O2-air mixture emerges at a pressure to provide adequate ventilation & oxygenation  Intraluminal tracheal pressure depends upon: driving pressure from reducing valve, the size of needle jet, & the length, int. diameter & the design of bronchoscope.  Pressure varies inversely with cross sectional area of the bronchoscope so insertion of catheter or biopsy forceps into the lumen causes the intra tracheal pressure to rise. 4. HFPPV 5. MECH VENTILLATION
  • 61. PHYSIOLOGICAL CHANGES ASSOCIATED WITH FIBEROPTIC BRONCHOSCOPY:  In all patients: hypoxemia, average decline in Pao2 is 20mmHg & lasts for 1-2hrs.By 24hrs blood gases are back to normal.  During or after bronchoscopy patients experience increased airway obstruction: inc FRC ,dec in PaO2, VC, Fev1& Forced inspiratory flow. all return to baseline by 24hrs.changes are secondary to activation of irritative reflexes or mucosal edema.  If suction at 1atm is applied, air is removed @ 14L/min this causes dec in FiO2, PAO2, & FRC leading to dec PaO2,therefore suctioning should be kept brief.  If fibroscopy is planned ETT of largest possible diameter should be used.  Insertion leads to significant rise in PEEP, may cause barotrauma so if PEEP is already being used, it should be discontinued.  With Nd-YAG LASERS FiO2 should be kept minimum & titrated against saturation, to reduce chances of catching endobronchial fire.
  • 62. COMPLICATIONS:  Trauma to teeth  Hemorrhage  Bronchospasm  Perforation  Subglottic edema  In most cases, it is best to intubate the trachea with an ETT after bronchoscopy under general anaesthesia. This permits avoidance or treatment of some of these problems, particularly increased airway reactivity. It also facilitates suctioning and allows the patient more gradual recovery.
  • 63. SMOKING CESSATION TIMELINE – THE HEALTH BENEFITS OVER TIME  In 20 minutes, blood pressure and pulse rate decreases, and the body temperature of hands and feet increases.  Carbon monoxide in cigarette smoke reduces the blood’s ability to carry oxygen. At 8 hours, the carbon monoxide level in blood decreases, With the decrease in carbon monoxide, blood oxygen level increases to normal.  At 24 hours, risk of having a heart attack decreases.  At 48 hours, nerve endings start to regrow and the ability to smell and taste is enhanced.  Between 2 weeks and 3 months, circulation improves, walking becomes easier and coughing or wheezing is not as often. Phlegm production decreases. Within several months, there is significant improvement in lung function.
  • 64.  In 1 to 9 months, coughs, sinus congestion, fatigue and shortness of breath decreases as there is continuous significant improvement in lung function. Cilia, tiny hair-like structures that move mucus out of the lungs, regain normal function.  In 1 year, risk of coronary heart disease and heart attack is reduced to half that of a smoker.  Between 5 and 15 years after quitting, risk of having a stroke returns to that of a non-smoker.  In 10 years, risk of lung cancer drops. Additionally, risk of cancer of the mouth, throat, esophagus, bladder, kidney and pancreas decrease. Even after a decade of not smoking however, risk of lung cancer remains higher than in people who have never smoked. Risk of ulcer also decreases.  In 15 years, risk of coronary heart disease and heart attack in similar to that of people who have never smoked. The risk of death returns to nearly the level of a non-smoker.
  • 66. HALF LYING UPPER LOBE POSTERIOR SEGMENT LEFT RIGHT SIDE LYING, 45 DEGREE TURN TOWARDS FACE SIDE, THREE PILLOW
  • 67. SUPINE LYING FROM SUPINE 45 DEGREE TURN TOWARDS RIGHT, PILLOW FROM SHOULDER TO HIP, FOOT END RAISED 14”
  • 68. FROM SUPINE 45DEGREE TURN TOWARDS LEFT, PILLOW FROM SHOULDER TO HIP, FOOT END RAISED 14”. LOWER LOBE ANT. BASAL SEGMENTS SUPINE, PILLOW UNDER HIP, FOOT END 18” ELEVATED.
  • 69. PRONE LYING, PILLOW UNDER HIP, FOOT END ELEVATED 18”. CONTRALATERA L SIDE LYING, PILLOW BELOW HIP,FOOT END 18” RAISED