#hypoxemia

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Pathology Glossary: Circulatory Shock

Click through to Review Types and Causes of Shock! 

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Understanding Ventilation Perfusion (V/Q) Mismatch

Need help decoding ventilation perfusion (VQ) mismatch? Read on for definitions and memory tips.

Take a deep breath. We’ll help you put it together. 

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Hypoxemia with an increased A-a gradient

A-a gradient (normal) = 5-10 mmHg ・Medically significant A-a >30 mmHg

PᴀO₂ = %O₂ (713) - PaCO₂/0.8 ≈ 150 - PaCO₂/0.8

↑A-a gradient : ↓PaO₂ of pulmonary origin

Ventilation defect ➝ Impaired O₂ delivery to alveoli ・Oxygen supplementation does not improve PaO₂ if diffuse airway collapse ・Produces intrapulmonary shunt ・Ex: airway collapse (atelectasis) due to RDS, mucus plug

Perfusion defect ➝ Increased pathologic dead space ・Oxygen supplementation does improve PaO₂ ・Ex: pulmonary embolus

Diffusion defect ➝ O₂ cannot diffuse through alveolar-capillary interface ・Ex: interstitial fibrosis, pulmonary edema

Right-to-left Cardiac Shunt ・Ex: tetralogy of Fallot

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Monitoring 2 signs easily measured at home can cut COVID death risk

Monitoring 2 signs easily measured at home can cut COVID death risk

New York: Simply monitoring respiration rate and blood-oxygen saturation at home can cut the risk of death due to COVID-19, finds a study. According to the current guidance from the US Centers for Disease Control and Prevention (CDC), people with COVID-19 must seek medical attention when they experience overt symptoms such as “trouble breathing” and “persistent pain or pressure in the chest” —…

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نقص الأكسجين بالدم

ينقل الدم الأكسجين إلى أعضاء وأنسجة جسمك. ويحدث نقص الأكسجين بالدم – Hypoxemia بسبب مجموعة متنوعة من الحالات، بما في ذلك الربو والالتهاب الرئوي ومرض الانسداد الرئوي المزمن (COPD)، وهى حالة طبية خطيرة وتتطلب عناية طبية فورية. (more…)

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