colleagues [1] in the previous issue of Critical Care. We agree with the authors’ fi nal conclusion that there should not be a deliberate policy to decrease the fraction of inspired oxygen (FiO2) in the absence of accurate and reliable oximetry. In the developed world, accurate and reliable oximetry and blood gas results are ubiquitous in ICU settings, the context of their study. However, we ha...

BACKGROUND Decreased diffusing capacity of the lung for carbon monoxide (DLCO) is associated with emphysema. DLCO is also related to decreased arterial oxygen tension (PaO2), but there are limited data on associations between PaO2 and computed tomography (CT) derived measures of emphysema and airway wall thickness. OBJECTIVE To examine whether CT measures of emphysema and airway wall thicknes...

Background: It is necessary to determine the value of PaO2 and PaCO chronic bronchitis diseases and their separation from other diseases. For the diagnosis of COPD diseases and their separation from other diseas oxygen, we need to know the amount of Pao2 and PaCO2 in patients; ABG is a Materials and Methods: This cross sectional study was carried out on 1 referring to Afshar hospital in Yazd in...

Pendahuluan: Saat ini COVID-19 masih menunjukkan peningkatan dalam hal prevalensi dan mortalitasnya. mempunyai gejala berupa demam, batuk kering, fatique, kemudian berkembang menjadi sesak napas sampai gagal ARDS. Happy hipoxemia ditemukan pada sebagian pasien yaitu secara subjektif tidak menyatakan adanya sesak, namun didapatkan gangguan oksigenasi. Diperlukan suatu parameter untuk mengevaluas...

BACKGROUND Patients with severe chronic obstructive pulmonary disease (COPD) have impairment in most areas of quality of life, but a relationship between impairment of the partial pressure of oxygen in arterial blood (PaO2) and quality of life has not been established. Previous studies used general health measures such as the Sickness Impact Profile (SIP). In this study a disease-specific healt...

1. To examine the effect of varying oxygen partial pressure (PAO2) on nitric oxide (DLNO) and carbon monoxide (DLCO) diffusing capacity (transfer factor), 10 subjects performed combined DLCO/DLNO measurements with the inspired mixture made up with three different oxygen concentrations (25%, 18% and 15%) to give PAO2 values of 12-20 kPa. 2. A novel method is described for calculating membrane di...

We investigated the effects of isosorbide dinitrate (IDN) on gastric blood flow (GBF), portal venous pressure (PVP) and blood gas of rats with liver cirrhosis (LC) accompanied by portal hypertension. Thirty male Wistar rats (LC in 17 and normal in 13) were used. Before and after IDN administration, GBF, PVP and blood gas in the femoral artery and portal vein were measured. Portal blood oxygen c...

INTRODUCTION Arterial concentrations of carbon dioxide (PaCO2) and oxygen (PaO2) during admission to the intensive care unit (ICU) may substantially affect organ perfusion and outcome after cardiac arrest. Our aim was to investigate the independent and synergistic effects of both parameters on hospital mortality. METHODS This was a cohort study using data from mechanically ventilated cardiac ...

A non-invasive technique was developed for measuring alveolar carbon dioxide and oxygen tension during tidal breathing. This was achieved by solving the Bohr equations for mean alveolar carbon dioxide and oxygen tensions (PACO2, PAO2) from known values of the dead-space:tidal volume ratio measured by helium washout, and from the mixed expired partial pressure of carbon dioxide and oxygen. The d...