摘要:

The authors used an in vitro flow system to evaluate the sources of error in a previously described closed system thermodilution method for cardiac output determinations. Cardiac outputs were overestimated by as much as 49% because the injectate warmed as it was drawn through the connecting tubing. Submerging the tubing in the ice bath prevented this problem. The authors also evaluated a new closed system thermodilution cardiac output method. The method employed a bypass line and a spring loaded autosyringe which enables the user to flush the system with cold fluid, thereby ensuring accurate injectate temperatures. Cardiac output determinations with this method were as accurate as those obtained with a CO2powered injector. Additionally, this method is easy to use, accommodates injection volumes of 1–10 ml, and is inexpensive.

ISSN:0090-3493    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

To achieve synchronized differential pulmonary ventilation, an Ohio 560 ventilator was modified through separation of the outputs of the deep breath bellows and the tidal volume bellows and providing independent volume, flow rate, PEEP, oxygen-humidification, and alarm systems. The described ventilator modification is simple, inexpensive, and does not alter the performance characteristics of the original unmodified ventilator. Differential lung ventilation may be more easily achieved with this modified ventilator than with the simultaneous use of two ventilators or external electronic synchronizers.

ISSN:0090-3493    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

Significant resistance was encountered when an attempt was made to withdraw a persistently wedged pulmonary artery catheter. A small amount of air was injected into the balloon lumen with great difficulty. This injection freed the catheter which was removed, but produced significant sudden hemoptysis and a pneumothorax. The etiology of this complication and guidelines to avoid it are presented.

ISSN:0090-3493    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

Acute respiratory failure presenting as intractable bronchospasm was caused by tracheal obstruction due to an aneurysm of the thoracic aorta. Atropine was used successfully as a bronchodilating agent, as conventional therapy failed. The diagnosis was established by fiberoptic bronchoscopy.

ISSN:0090-3493    

出版商:OVID    

年代:1981

数据来源: OVID

摘要:

Dopamine is commonly used to improve cardiac output and to maintain peripheral perfusion after myocardial injury. It has several advantages over other catecholamines. At effective inotropic dose levels, dopamine produces less peripheral vasoconstriction than norepinephrine. Dopamine also causes fewer arrhythmias than isoproterenol.This is a case report of a heart transplant patient who began rejecting and developed heart failure. In addition to the immunosuppressive agents, dopamine was used initially as the vasopressor with marked deterioration in the patient's condition. Dobutamine, a new inotropic agent, was substituted for dopamine with subsequent improvement in cardiac function. The authors concluded that dobutamine may be the most appropriate agent to use in the rejecting transplanted heart because of the former's direct action on the heart. Dobutamine may also be preferred for support of the cardiac outputs of patients with chronic heart failure.

ISSN:0090-3493    

出版商:OVID    

年代:1981

数据来源: OVID

ISSN:0090-3493    

出版商:OVID    

年代:1981

数据来源: OVID

ISSN:0090-3493    

出版商:OVID    

年代:1981

数据来源: OVID