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Biomedical subjects

B Baidwan

Publications and source records attributed to B Baidwan.

4 recordsLinked to original sources
PubMed1979

The effects of unanesthetized arterial puncture on PCO2 and pH.

Painful unanesthetized arterial puncture may produce transient hyperventilation, and this hyperventilation might alter resting values of arterial pH and PCO2. We investigated this possibility by comparing pH and PCO2 values of blood samples obtained by arterial puncture with values of arterialized venous blood obtained by a painless method. In 19 consecutive subjects, virtually no difference in pH or PCO2 resulted from an arterial puncture that could not be attributed to the inherent precision of the measuring instrument. Mean +/- SEM pH was identical (7.45 +/- 0.05) both before and during an arterial puncture, as was PCO2 (34.4 +/- 1.2 mm Hg). The variation (SD) in PCO2 within an individual subject was +/- 1.7 mm Hg, which was almost identical to the inherent precision of the Radiometer ABL-2 acid base laboratory (SD, +/- 1.32). We conclude that an unanesthetized arterial puncture provides an accurate measurement of resting pH and PCO2.

Anxiety↗
PubMed1978

Clinical evaluation of new office spirometer.

The accuracy of a simple, pneumatic, direct-recording spirometer suitable for office use was evaluated by comparing spirometry on a water-sealed, 13.5-liter, water-filled spirometer for 120 patients. Good correlation between the two spirometers was seen through a wide range of values for forced vital capacity, forced expiratory volume in one second, and forced expiratory flow during 25% to 75% of forced vital capacity, with coefficients of correlation being .988, .988, and .948, respectively. All correlations were significant. The pneumatic spirometer is accurate, simple to operate, and suitable for spirometry in the office and clinic.

Humans↗