Perinatology.com

Pulmonary Disorders in Pregnancy

Overview

Respiratory disease in pregnancy ranges from common chronic conditions such as asthma to rare obstetric emergencies such as amniotic fluid embolism. This updated page emphasizes high-yield clinical resources for asthma, venous thromboembolism and pulmonary embolism, pulmonary hypertension, cystic fibrosis and chronic lung disease, respiratory infections, pneumonia, influenza, COVID-19, and tuberculosis.

The original legacy page contained many dead or outdated links. This version keeps the topic structure but replaces older broken references with current or still-active sources from professional societies, major journals, and public health agencies.

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Asthma Amniotic Fluid Embolism Pulmonary Embolism / VTE Pulmonary Hypertension Cystic Fibrosis & Chronic Lung Disease Respiratory Infections & Pneumonia Tuberculosis General Respiratory Resources

Asthma

Asthma remains one of the most common chronic medical disorders in pregnancy. Good control is generally safer than undertreatment, and exacerbation prevention is a major obstetric goal.

Clinical points

  • Assess symptom control, exacerbation history, inhaler adherence, and trigger exposure early in pregnancy.
  • Continue indicated controller therapy; do not reduce effective treatment solely because of pregnancy.
  • Escalate promptly for acute exacerbations; maternal oxygenation is a fetal priority.
  • Coordinate care with pulmonology for severe asthma, recurrent steroid bursts, frequent emergency visits, or uncertain diagnosis.

Updated references

Recent literature notes
Current international guidance continues to favor active control of maternal asthma throughout pregnancy, with stepwise therapy based on severity and control, and the 2024 GINA report remains the most comprehensive current open guideline resource.

Amniotic Fluid Embolism

AFE is a rare, catastrophic obstetric emergency characterized by sudden cardiorespiratory collapse and often coagulopathy. Rapid recognition and multidisciplinary response are essential.

Clinical points

  • Suspect AFE in sudden maternal hypoxia, hypotension, cardiovascular collapse, or DIC during labor, delivery, or the immediate postpartum period.
  • Immediate priorities are maternal resuscitation, oxygenation, hemodynamic support, hemorrhage control, and massive transfusion readiness.
  • Management is supportive and team-based; ICU, anesthesia, transfusion services, and maternal-fetal medicine involvement are usually required.

Updated references

Why this section was updated
The older eMedicine and Contemporary OB/GYN links on the legacy page were outdated or unstable. This section now points to the SMFM guidance page and newer review literature.

Pulmonary Embolism / Venous Thromboembolism

PE remains a major cause of serious maternal morbidity and mortality. Pregnancy-adapted diagnostic pathways and prompt anticoagulation decisions are central to care.

Clinical points

  • Consider PE in dyspnea, pleuritic chest pain, tachycardia, syncope, hypoxemia, or unexplained cardiopulmonary symptoms.
  • Use pregnancy-specific diagnostic pathways and local radiology protocols when imaging is indicated.
  • Low-molecular-weight heparin is the usual first-line treatment for confirmed acute VTE in pregnancy unless contraindicated.
  • Coordinate timing of anticoagulation around delivery and neuraxial anesthesia planning.

Updated references

Pulmonary Hypertension

Pulmonary hypertension in pregnancy is high risk and generally warrants care in a tertiary multidisciplinary center with maternal-fetal medicine, cardiology, anesthesia, and critical care input.

Clinical points

  • Prepregnancy counseling is ideal when pulmonary hypertension is known before conception.
  • Pregnant patients with known or newly suspected pulmonary hypertension should be referred early to experienced centers.
  • Medication review is essential because some pulmonary hypertension therapies are contraindicated or potentially teratogenic.
  • Delivery planning should be individualized and coordinated well before term.

Updated references

Cystic Fibrosis & Chronic Lung Disease

Outcomes for pregnancy in people with cystic fibrosis have improved in the CFTR-modulator era, but maternal nutrition, pulmonary status, diabetes risk, and medication review remain central.

Clinical points

  • Assess baseline lung function, nutrition, pancreatic status, diabetes, and infection history before or early in pregnancy.
  • Coordinate management with a CF center whenever possible.
  • Medication and CFTR modulator decisions should be individualized with pulmonary and maternal-fetal medicine input.
  • Delivery planning should account for respiratory reserve and comorbid disease burden.

Updated references

Respiratory Infections & Pneumonia

Viral and bacterial respiratory infections may be more severe during pregnancy. Influenza, COVID-19, and pneumonia should be recognized and treated promptly when clinically indicated.

Clinical points

  • Pregnancy increases risk for severe influenza illness; do not delay empiric antiviral treatment when influenza is suspected.
  • Pregnancy also increases risk for severe COVID-19; vaccination counseling and early treatment evaluation should follow current guidance.
  • Pneumonia in pregnancy warrants a low threshold for escalation when oxygen needs rise or sepsis is suspected.
  • Use local antimicrobial guidance, obstetric sepsis pathways, and imaging when clinically needed.

Updated references

Tuberculosis

Pregnancy does not eliminate the need to evaluate or treat tuberculosis. Distinguish active TB disease from latent TB infection and use current CDC guidance for pregnancy-specific decisions.

Clinical points

  • Active TB disease in pregnancy should be treated promptly.
  • Latent TB treatment timing depends on risk of progression and maternal factors.
  • Coordinate care with infectious disease or public health TB programs when available.
  • Review medication safety, liver toxicity risk, and newborn/postpartum follow-up needs.

Updated references

General Respiratory Resources

Additional broad reviews that may be useful when evaluating dyspnea, chronic lung disease, or multi-system respiratory symptoms in pregnancy.

General references