Hypoxemia and Coronary Blood Flow12

Hypoxemia and coronary blood flow.

Blood oxygenation and spurious hypoxemia

In health pO2(a) is maintained within the range 10.613.3 kPa (80-100 mmHg) and hypoxemia (reduced blood oxygen) is diagnosed if pO2(a) is less than 10.6 kPa (80 mmHg). The purpose of this article is to highlight the spurious severe hypoxemia that occurs in patients with particularly high white-cell count or high platelet count. In these patients there is a marked discrepancy between measured (i...

Hypoxemia

تنفس یکی از اساسی ترین نیازهای انسان است که در صورت عدم تأمین این نیاز، حیات انسان چند دقیقه ای بیشتر ادامه نخواهد یافت. اهمیت این فعالیت حیاتی از تأثیر آن بر تغذیه سلولها به عنوان کوچکترین واحد سازنده بدن انسان نشأت می گیرد، زیرا اکسیژن یکی از مواد ضروری برای سلولها می باشد و کسب این ماده حیاتی فقط از طریق تنفس مناسب و راحت امکان پذیر است .

Hypoxemia, oxygen content, and the regulation of cerebral blood flow.

This review highlights the influence of oxygen (O2) availability on cerebral blood flow (CBF). Evidence for reductions in O2 content (CaO2 ) rather than arterial O2 tension (PaO2 ) as the chief regulator of cerebral vasodilation, with deoxyhemoglobin as the primary O2 sensor and upstream response effector, is discussed. We review in vitro and in vivo data to summarize the molecular mechanisms u...

The factors that affect blood and blood products usage in coronary artery graft surgery

Background: Coronary artery bypass surgery is one of the surgeries in which high blood transfusions are needed. About 20% of all surgical operations require a blood transfusion. Packed cell administration increases perioperative morbidity and mortality. In the United States, from every 1000 people, one has undergone a coronary artery bypass graft surgery, and it is estimated that around 800,000...