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Biomedical subjects

A Oduro

Publications and source records attributed to A Oduro.

23 records · Page 2Linked to original sources

Effects of intravenous enoximone following coronary artery bypass surgery.

The effects of intravenous enoximone were investigated in patients with reduced left ventricular ejection fraction following coronary artery bypass graft surgery. Pulmonary capillary wedge pressure was maintained at its original level during therapy. Results showed an improvement in cardiac index of approximately 35% and a reduction of systemic vascular resistance of approximately 30% in 10 out of 16 patients. In an attempt to explain the failure of 6 patients to respond to enoximone therapy, preliminary studies revealed that a repeat dose of enoximone may elicit a response. It is further suggested that postsurgical trauma may change the behaviour of the heart in response to this agent, perhaps due to a reduction in high-energy phosphate levels.

Cardiotonic Agents↗

The use of etomidate infusions during anaesthesia for cardiopulmonary bypass.

The effects of cardiopulmonary bypass and hypothermia were studied on the plasma concentration and metabolism of a continuous infusion of etomidate in six patients. Continuous etomidate infusions (20 micrograms/kg/minute) with analgesic cover may be a suitable anaesthetic for cardiac surgery. This rate of infusion provides adequate plasma concentrations, and it would appear unnecessary from the results to alter the rate of infusion during cardiopulmonary bypass and hypothermia.

Adult↗

Transforming the "unacceptable" donor: outcomes from the adoption of a standardized donor management technique.

BACKGROUND: Donor management remains one of the most neglected areas of transplantation. A comprehensive donor management regimen has been developed. The results of the application of this strategy form the basis of this report. METHODS: Full hemodynamic data were collected from 150 multiorgan donors between October 1990 and August 1993. The data were collected at the time of donor team arrival, after insertion of a pulmonary artery floatation catheter and immediately before cardiac excision. RESULTS: Fifty-two donors (35%) fell well outside our minimum acceptance criteria on arrival. Twenty-one of fifty-two had a mean arterial pressure less than 55 mm Hg (mean 47 mm Hg) despite inotropic support in most cases; 10 of 52 had a central venous pressure greater than 15 mm Hg (mean 18.0 mm Hg); 2 of 52 had a high inotrope requirement greater than 20 micrograms/kg/min (mean 25 micrograms/kg/min). After the insertion of a pulmonary artery floatation catheter, an additional 13 of 52 donors were found to have a pulmonary capillary wedge pressure greater than 15 mm Hg (mean 19.8 mm Hg), and the final 6 of 52 had a low left ventricular stroke work index, less than 15 gm (mean 12.8 gm). After optimal management, including hormone replacement 44 of 52 donors yielded transplantable organs (29 hearts, 15 heart and lung blocks). Thirty-seven of forty-four patients (84%) were alive and well from 13 to 48 months after transplantation. There were five early deaths (11%) caused by infection (heart), adult respiratory distress syndrome (heart), arrhythmia (heart), cerebrovascular event (heart and lung), and infection (heart, lung, and liver). Two late deaths (5%) occurred as a result of tamponade (3 months, heart) and infection (14 months, heart and lung). Eight of fifty-two organs were still unsuitable for transplantation after optimum management during the splanchnic dissection as a result of inotrope dependency (n = 4), left ventricular hypertrophy (n = 2), and coronary artery disease (n = 2). CONCLUSIONS: The data indicate that, of the organs which initially fall outside our transplant acceptance criteria, 92% are capable of functional resuscitation. Conversely, superficial assessment may not show compromised function. Optimizing cardiovascular performance also has important implications for the viability of all transplantable organs. This aggressive approach to donor management has resulted in the transplantation of 44 donor hearts that may otherwise have been turned down or inappropriately managed.

Adult↗