Use of arterialized venous blood sampling during incremental exercise tests

Abstract

Close agreement between arterialized venous and arterial pH, PCO2, and lactate has previously been demonstrated during steady-state exercise. The purpose of the present study was to compare arterialized venous and arterial pH, PCO2, K+, lactate, pyruvate, and epinephrine during the constantly changing circumstances of an incremental exercise test. Eight normal subjects undertook an incremental exercise test (increasing by 20 W/min) to exhaustion on a cycle ergometer during which simultaneous arterial and arterialized venous samples were drawn over the last 20 s of each work load. Linear regression of arterialized venous on arterial values showed that r varied from 0.97 to 0.99 for the variables examined and, therefore, showed that accurate estimates of arterial values could be made from the arterialized venous results during incremental testing. For many purposes it could be assumed that arterialized venous values equaled arterial values without serious error.

Loading of Trained Inspiratory Muscles Speeds Lactate Recovery Kinetics

“…Paragraph Number 11 During all exercise trials, arterialized venous blood was drawn from a dorsal hand vein via an indwelling 21-G cannula (9,25). Arterialization was achieved by immersing the hand in water at ~40˚C for 10 min prior to cannulation and by warming the hand during exercise using an infrared lamp.…”

Diaphragm fatigue during exercise at high altitude: the role of hypoxia and workload

“…Arterialized venous blood [14] was obtained to estimate Pa,CO 2 (ABL 300; Radiometer, Copenhagen, Denmark) and measure lactate (2300 STAT; Yellow Spring Instrument, Yellow Spring, OH, USA). Pa,CO 2 and barometric pressure (PB) were used to calculate the alveolar oxygen partial pressure (PA,O 2 ) [15].…”

Effect of Altered Body CO2 Stores on Pulmonary Gas Exchange Dynamics During Incremental Exercise in Humans

“…Prior to each protocol, a 20-gauge catheter was inserted into a vein on the dorsum of the left hand, warmed for at least 20 min by enclosure in a large heating pad so as to 'arterialise' the blood (McLoughlin et al 1992). Once the subject was seated on the cycle ergometer, the temperature of the hand was maintained by placing the hand on the heating pad (located on a small platform immediately adjacent to the left handlebar) and also heating it from above with an infra-red lamp.…”