NONPULMONARY FACTORS
Abnormalities other than alterations in lung function may influence the Pao2 through their effect on the mixed venous Po2(Py02). The Pv02 is decreased when cardiac output is inappropriately low, when 02 consumption (Vo2) is increased (as with exercise or fever), or when the hemoglobin concentration or 02 saturation is low. For any lung unit, the resultant end-capillary Po2 is influenced by the Pvo2, although the magnitude of this effect on the arterial 02 content will be greatest in lungs with Va/Q inequality or shunt (Fig. 17-9). The importance of this phenomenon is the recognition that a fall in Pao2 in a patient with lung disease may be due to one of these nonpulmonary factors rather than a deterioration in lung function, thus requiring a very different intervention.
- AORTIC ARTERITIS
- EFFECTS OF PULMONARY HYPERTENSION ON PULMONARY FUNCTION
- SMOKING CESSATION
- Chromic Renal Failure Due to Drugs
- ANGINA PECTORIS
- Sigmoidoscopy and Colonoscopy
- Complications of Dialysis
- Aminoaciduria
- ETIOLOGY OF GASTROINTESTINAL BLEEDING
- CLASSIFICATION AND PATHOPHYSIOLOGY
- Sarcoidosis
- Procainamide
- THE APPROACH TO THE PATIENT WITH GASTROINTESTINAL HEMORRHAGE
- TUMORS OF THE PLEURAL SPACE
- NONPULMONARY FACTORS
- Outcome and Prognosis
- Beta Blockers
- CONTROL OF BREATHING IN DISEASE STATES
- Sickle Cell Anemia (SS)
- Skin and Conjunctiva
- SPECIFIC PATHOGENIC ORGANISMS
- CLASSIFICATION OF THE MALABSORPTION SYNDROMES
- DEFINITION
- HEMODIALYSIS AND HEMOPERFUSION IN THE TREATMENT OF DRUG OVERDOSES
- ARRHYTHMIAS in ACUTE MYOCARDIAL MFARCTION
- DEFINITION
- Diet
- NAUSEA AND VOMITING
- TREATMENT OF MALABSORPTION
- CARDIAC PACEMAKERS
- Visceral Angiography
- ATRIAL RHYTHM DISTURBANCES
- NORMAL ESOPHAGEAL PHYSIOLOGY
- Renal Biopsy
- PATHOGENESIS OF RESPIRATORY TRACT INFECTION