Journal of anesthesia
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Journal of anesthesia · Mar 1994
Changes of oxygen transport variables and serum lactate during open-chest cardiac massage in dogs.
The aim of this study was to investigate the influence of critically low cardiac output (CO) upon oxygen transport. We especially focused on the changes of mixed venous oxygen saturation (S-vO2) in the presence of oxygen consumption ([Formula: see text]) debts. Additionally, we examined the correlation between the cumulative oxygen deficit (Def[Formula: see text]) and serum lactate. ⋯ Supplydependent[Formula: see text] was observed when CO decreased below 40 ml·min-1·kg-1. The mean value of S-vO2 in the range of supply-dependent[Formula: see text] was 13±2% and did not change significantly during 1 h of CPR. The changes of lactate from baseline values were linearly correlated with Def[Formula: see text] (r=0.62,P<0.01), but absolute values of serum lactate were not.
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Journal of anesthesia · Mar 1994
Preoperative estimation of pulmonary extravascular thermal volume in patients undergoing pneumonectomy.
Pulmonary extravascular thermal volume (PETV) was measured during pulmonary artery occlusion in 18 patients preoperatively and 7 patients postoperatively who were undergoing pneumonectomy. We found that the PETV decreased from 6.6±2.3 ml·kg-1 before occlusion to 4.1±1.6 ml·kg-1 during occlusion. ⋯ There was a significant correlation between the PETV during occlusion and that at 3 weeks after pneumonectomy (r=0.66,P<0.05). In conclusion, PETV during pulmonary artery occlusion is a reliable baseline value in the assessment of postoperative pneumonectomy values.
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Journal of anesthesia · Mar 1994
Effects of a forced-air system (Bair Hugger, OR-type) on intraoperative temperature in patients with open abdominal surgery.
Intraoperative hypothermia is difficult to avoid and may present a significant clinical risk during the early postoperative phase. We evaluated a forced-air system [Bair Hugger, OR-type (BH)] for warming intraoperative patients with open abdominal surgery. Twenty patients received BH warming [BH(+) group] and another 20 patients, who served as controls, did not [BH(-) group]. ⋯ Rectal and fingertip temperatures in the BH(+) group were significantly higher than those in the BH(-) group, and central-peripheral temperature gradients in the BH(+) group were significantly smaller than those in the BH(-) group during the study, except at 180 min. No shivering occurred in either group. Therefore, BH is an effective warming device during open abdominal surgery.