
Nguyên văn bởi
DarkoftheSun
Tiêu chuẩn để chẩn đoán Chronic respiratory failure là gì vây Mickey?
Hi, bạn tham khảo ở đây thử xem:
http://www.patient.co.uk/showdoc/40000632/
Mình tìm được ở http://resources.metapress.com/pdf-p...h&size=largest
THE spectrum of patients with respiratory failure ranges: from those with acute overwhelming lung injury as demonstrated by the, adult respiratory distress syndrome to those where respiratory failure results from a deterioration in a preexisting chronic lung disorder such as chronic obstructive pulmonary disease (COPD). This deterioration may be rapid in the case of a respiratory infection, resulting in acute respiratory failure. However the deterioration is often very gradual related to a slow progression of the underlying lung disorder, which results in chronic respiratory failure.
Respiratory failure is defined as an arterial partial pressure of O2 (PaO2) less than 8.0 kPa (60 mm Hg), with or without arterial partial pressure of CO2 (PaCO2) greater than 6.7 kPa (50 mm Hg) while breathing air at sea level. Respiratory failure may also lead to effects on the heart such as cor pulmonale (right heart failure). Clinical signs of cor pulmonale include elevation of the jugular venous pressure and pitting ankle edema. Patients may have Stage IV: Very Severe COPD even if the FEV1 is > 30% predicted, whenever these complications are present. At this stage, quality of life is very appreciably impaired and exacerba-tions may be life threatening.
Và còn nữa:
Diagnosis Of Respiratory Failure
It is impossible to estimate the extent of hypoxemia and hypercapnia by observing a patient's signs and symptoms, and mild hypoxemia and hypercapnia may go entirely unnoticed. Blood oxygen must fall markedly before changes in breathing and heart rate occur.
The clinical features of respiratory failure vary widely in individual patients.
The way to diagnose respiratory failure, therefore, is to measure oxygen (PaO2) and carbon dioxide (PaCO2) in the arterial blood. However the levels that indicate respiratory failure are somewhat arbitrary. Depending on age, a PaO2 less than 60 mm Hg or PaCO2 greater than 45 mm Hg generally mean that the patient is in respiratory failure.
Hay rõ hơn:
Chronic Respiratory Failure:
Have chronic respiratory failure à chronic respiratory muscle weakness.
Chronic increase PCO2 à compensate w/metabolic alkalosis , increase bicarb to maintain normal pH.
Acute respiratory: ¯ .08 in pH for every increase 10mmHg in PaCO2
Chronic: ¯ .03 change in pH for every increase 10 mmHg in PaCO2.
Có cái hình này thấy giống mình học trong Block nên đưa lên cho các bạn cùng xem: