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Rapid Acquisition Of Key Concepts Pulmonology

Apr 11, 2024

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Contraindications to Lung Transplantation

Predictors of Survival After Lung Transplantation

Characteristics of the Ideal Lung Donor

Classification of Pneumonia

Chest X-ray Of Pneumonia

Initial Treatment Strategies for Outpatients with Community Acquired Pneumonia

Flow Loop Pattern

Treatment Of Asthma

Cystic Fibrosis Pathology

Normal Alveolus Vs Injured Alveolus During The Acute Phase

Staging Of Lung Cancer

Rapid Acquisition Of Key Concepts Pulmonology

Contraindications to Lung Transplantation

Contraindications to Lung Transplantation
Absolute ContraindicationsRelative Contraindications
Surgical considerationsAnatomic abnormalities not amenable to transplant procedure
Age>65 years
Functional statusImmobility, inability to participate in physical therapy/rehabilitationLimited functional status as defined by 6-minute walk distance
Medical comorbiditiesUntreatable, irreversible organ dysfunctionChronic kidney disease
Active malignancy or malignancy with insufficient remission period
Active bacterial bloodstream infectionInfection resistant to treatment or of high risk for posttransplant morbidity/mortality (Burkholderia cenocepacia, Mycobacterium abscesses)
Uncontrolled viral infection (HIV, hepatitis)
Nutritional BMI <18 or >30-35
Psychosocial Untreatable, irreversible psychiatric disorder with potential to impact transplant outcome
Active substance abuseLimited social supports
Other circumstances that would complete ability to participate in and comply with posttransplant careHistory of noncompliance with medical treatment

Predictors of Survival After Lung Transplantation

Predictors of Survival After Lung Transplantation

1 Year Survival

≥10 Year Survival

Donor factors

HCV donor

Recipient factors

Age <70 years

Diagnosis other than pulmonary fibrosis, pulmonary hypertension, sarcoidosis, A1AT 

O2 requirement <5L

Cl >2

Outpatient at time of transplant 

Preserved recipient eGFR 

Total bilirubin <2

Age 18-35 years

Donor/Recipient Factors

Non female to male transplant 

Donor/recipient weight ratio >0.7

Higher levels of HLA matching

Operative factors

Avoidance of unplanned conversion to cardiopulmonary bypass 

Decreased ischemic time

Bilateral lung transplant 

Posttransplant factors

Pa07/Fi02>260 at 72h 

Absent need for postoperative ECMO support

Fewer hospitalizations for rejection

Other factors

Higher center volume

Higher center volume

Also Read: Hepatopulmonary Syndrome And Porto Pulmonary Hypertension


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Characteristics of the Ideal Lung Donor

Characteristics of the Ideal Lung Donor
Donor age<55 years
ABO compatibility Identical
Chest radiographyClear
PaO2:FiO2>300 on PEEP 5-cm H2O
Tobacco History<20 pack-years
Chest TraumaAbsent
Evidence of aspirationAbsent 
Prior thoracic surgeryNone
Sputum gram stainNegative 
Bronchoscopy FindingsNo purulent secretions

Classification of Pneumonia

Community acquired pneumonia

  • The pneumonia which does not satisfy 
    • HAP
    • VAP
    • HCALP
  • Are known as community acquired Pneumonia.
  • Patient admitted to hospital with another complaint.
    • Pneumonia has occurred within 48 hours of hospitalisation. 
    • No hospitalisation but pneumonia is present 

Hospital acquired pneumonia

  • Pneumonia after 48 hours of hospitalisation
    • Patient is not in intubation

Ventilator associated pneumonia

  • Pneumonia > 48 hours after intubation

Healthcare associated pneumonia

  • To identify the patients having multidrug resistant organism (earlier)

Definition

  • Pneumonia (No HAP or VAP)
  • History of
    • Hospitalisation >48 hours in last 98 days 
    • Within two are three months, if the patients had:
      • IV infusion
      • Chronic hemodialysis 
      • Wound care
      • Chemotherapy 
  • HAP and VAP are studied as the single entity (Similar bacteria)

Also Read: Harrison 21st Update Pulmonology

Chest X-ray Of Pneumonia

Lobar Pneumonia (Typical)
  • Lobar Pneumonia (Typical) or
  • Definitive sign on consolidation: Air bronchogram 
  • Localization: Silhouette sign 
  • Tracheal and esophageal shadows are obscured by white opacity:
    • Upper lobe involvement
  • Opacity is not distinguished from the cardiac border 
    • Right mid lobe consolidation
  • Opacity is not distinguished from the diaphragmatic margin 
    • Lower lobe consolidation.
 Air filled sacs (Pneumatocele)
  • Air filled sacs (Pneumatocele)
  • Seen in staphylococcus infections.
  • Seen in the paediatric population.
  • Rare in adults



 Bulging Fissure sign
  • Bulging Fissure sign 
  • Indicates Klebsiella Pneumonia
  • Clues can be – chronic alcoholism, red currant jelly sputum.
  • Upper lobe consolidation
    • Interlobar Fissure is bulging downwards
 Atypical Pneumonia
  • Atypical Pneumonia
  • Bilateral diffuse alveolar opacity

Also Read: Special Considerations in Diabetes Mellitus

Initial Treatment Strategies for Outpatients with Community Acquired Pneumonia

Initial Treatment Strategies for Outpatients with Community Acquired Pneumonia

Status

Standard Regimen

No comorbidities or risk factors for antibiotic resistance

Combination therapy with amoxicillin (1 g tid) + either a macrolide or doxycycline (100 mg bid)

or

Monotherapy with doxycycline (100 mg bid)

or

Monotherapy with a macrolide

With comorbidities ± risk factors for antibiotic resistance

Combination therapy with

amoxicillin/clavulanate or a cephalosporin + ether a macrolide or doxycycline (100 mg bid)

or

Monotherapy with a respiratory fluoroquinolone

Antibiotic treatment within the past 3 months or contact with the health care system. Azithromycin (500 mg on day 1, then 250 mg/d for 4 days), clarithromycin (500 mg bid), or clarithromycin ER (1000 mg/d). If local prevalence of pneumococcal resistance is < 25%. Including chronic heart, lung, liver, or kidney disease; diabetes mellitus; alcoholism; malignancy, or asplenia. 500/125 mg tid or 875/125 mg bid. Cefpodoxime (200 mg bid) or cefuroxime (500 mg bid). Levofloxacin (750 mg/d), moxifloxacin (400 mg/d) or gemifloxacin (320 mg/d).

Flow Loop Pattern

Flow Loop Pattern

Treatment Of Asthma

Class

Name

Age

Asthma indication

Other indications

Anti-IgE

Omalizumab (SC)

≥ 6 years

Severe allergic asthma

Nasal polyposis, chronic spontaneous urticaria

Anti-IL5




Anti-IL5R

Mepolizumab (SC)

Resilizumab (IV)



Benralizumab (SC)

≥ 6 years

≥ 18 years



≥ 12 years

Severe eosinophilic/ Type 2 asthma

Mepolizumab; EGPA, CRSwNP, hypereosinophilic syndrome

Anti-IL4R

Dupilumab (SC)

≥ 6 years

Severe eosinophilic/ Type 2 asthma, or maintenance OCS

Moderate severe atopic dermatitis, CRSwNP

Anti-TSLP

Tezepelumab (SC)

≥ 12 years

Severe asthma

Cystic Fibrosis Pathology

Cystic Fibrosis Pathology
Cystic Fibrosis Pathology

Normal Alveolus Vs Injured Alveolus During The Acute Phase

Normal Alveolus Vs Injured Alveolus During The Acute Phase

Staging Of Lung Cancer

TNM 8th – Primary tumor characteristics

Tx


T0

Tis

Tumor is sputum/ bronchial washings but not be assessed in imaging or bronchoscopy


No evidence of tumor

Carcinoma in situ

T1

T1a(mi)

T1a

T1b

T1c

≤ 3 cm surrounded by lung/visceral pleura, not involving main bronchus

Minimally invasive carcinoma

≤ 1 cm

> 1 to ≤ 2 cm

> 2 to ≤ 3 cm

T2




T2a

T2b

> 3 to ≤ 5 cm or

Involvement of main bronchus without carcina, regardless of distance from carina or invasion visceral pleural or atelectasis or post obstructive pneumonitis extending to hilum


> 3 to ≤ 4 cm

> 4 to ≤ 5 cm

T3

> 5 to ≤ 7 cm in greatest dimension or tumor of any size that involves chest wall, pericardium, phrenic nerve or satellite nodules in the same lobe

T4

> 7 cm in greatest dimension or any tumor with invasion of mediastinum, diaphragm, heart, great vessels, recurrent laryngeal nerve, carina, trachea, oesophagus, spine or separate tumor in different lobe of ipsilateral lung

N1

2

3

Ipsilateral peribronchial and/or hilar nodes and intrapulmonary nodes

Ipsilateral mediastinal and/or subcarinal nodes

Contralateral mediastinal or hilar; ipsilateral/ contralateral scalene/ supraclavicular

M1

M1a

M1b

M1c

Distant metastasis

Tumor in contralateral lung or pleural/pericardial nodule/ malignant effusion

Single extrathoracic metastasis, including single non-regional lymphnode

Multiple extrathoracic metastasis in one or more organs

Hope you found this blog helpful for your NEET SS Pulmonology Preparation. For more informative and interesting posts like these, keep reading PrepLadder’s blogs. 

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