Burkhard Hecker

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Continuous mixed venous oxygen saturation (SvO2), using modified pulmonary artery (PA) catheters, can assist in the management of cardiac surgery patients. Two FDA-approved catheters are available for SvO2 monitoring. One system uses two wavelengths of light and the other is a three-wavelength system. The present study was designed to determine the accuracy(More)
To assess the effects of continuous positive (CPAP) or negative airway pressure (CNAP) breathing (+/- 10-12 cmH2O, duration 25 min) on blood content in the body's capacitance vasculature, regional distribution of labeled red blood cells was evaluated in seven spontaneously breathing supine volunteers. Counts were acquired by whole body scans and detectors(More)
Two pumps, 'PA' and 'PB,' with different drug delivery characteristics were available at the time of this study for patient-controlled analgesia (PCA). PB purportedly produces a 'placebo effect' by emitting an audible signal whenever the patient depresses the trigger button. PA emits an audible signal only when the drug is successfully administered into the(More)
The administration of magnesium ion (Mg++) has been reported to defibrillate the ventricles and to decrease the incidence of arrhythmias after cardiopulmonary bypass. In a prospective study of 76 randomly selected patients undergoing coronary artery bypass grafting, patients received either no Mg++, 0.25 mEq/kg of Mg++ during cardiopulmonary bypass with the(More)
The psychosocial functioning of 23 women treated both surgically and nonsurgically for vaginal agenesis was assessed by means of a retrospective questionnaire. Subjects were also physically examined to evaluate anatomic outcome. It was concluded that the patients psychological adjustment before treatment and the sensitivity of her family and medical(More)
male predominance (76%), the majority with unilateral disease (95%). Aggressive management for early cases, including laser photocoagulation, cryotherapy, and drainage of subretinal exudates using pars plana vitrectomy techniques, may prevent neovascular glaucoma and a painful blind eye. Because the definitive genetic defects for both VATER association and(More)
A woman with a history of systemic lupus erythematosus presented with extensive bilateral strokes due to acute inflammatory, occlusive large vessel disease affecting several aortic branches including the carotid, subclavian, renal, and iliac arteries. We quantitatively characterized the arterial inflammation in this patient and compared it with the(More)
The anesthetic potency of sufentanil was established by determining its effect on the minimal alveolar anesthetic concentration (MAC) of halothane. Each of eight selected doses of sufentanil was administered to a group of four to five mechanically ventilated rats anesthetized with halothane. Sufentanil was administered as a constant infusion preceded by an(More)
Lower intercostal and abdominal muscles interact with other respiratory muscles to produce inspiration as well as expiration. Intercostal nerve blockade from T6-T12 was produced in seven healthy males to study its effect on: 1) supine pulmonary function, 2) inspiratory effort, 3) hypercapnic ventilatory response, including mouth occlusion pressures with and(More)
Massive pulmonary embolism associated with total cardiovascular collapse occurred during the surgical repair of a ruptured abdominal aortic aneurysm with an aortocaval fistula. Pulmonary artery pressure monitoring permitted immediate diagnosis whereas central venous pressures did not reflect the obstruction to right ventricular outflow. Pulmonary(More)