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Biomedical subjects

P Mark

Publications and source records attributed to P Mark.

8 recordsLinked to original sources
PubMed1988

Influence of acute preoperative hemodilution on right ventricular function.

In a randomized study, the effects of acute, preoperative hemodilution (HD) (12 mL/kg) on right ventricular function were investigated in coronary artery surgery patients with reduced left ventricular function (ejection fraction < 50%) and significant stenosis of the right coronary artery (RCA). Blood was replaced either by hydroxyethyl starch (HES) solution (ratio 1:1; HD-HES; n = 15) or by Ringer's lactate, (RL) (ratio 2.5:1; HD-RL; n = 15). Fifteen comparable patients without HD served as a control group. Besides commonly measured pressure parameters, right ventricular end-diastolic volume (RVEDV), right ventricular end-systolic volume (RVESV), and right ventricular ejection fraction (RVEF) were measured using a computerized thermodilution technique before and after HD, as well as after extracorporeal circulation (ECC). Right ventricular systolic function, expressed as RVEF, was not changed significantly by HD in any group. Furthermore, right ventricular function of the hemodiluted patients was not impaired by the subsequent ECC procedure. None of the traditionally measured parameters could be correlated significantly to the right ventricular thermodilution variables. It is concluded that moderate HD does not change right ventricular function even when the RCA is significantly stenosed.

Aged↗
PubMedDate not supplied

[Ventral intercorporal spondylodesis in lumbar instabilities].

Ventral spondylodesis is said to be a useful method for the treatment of lumbar illness in combination with instability and pain. Between 1969 and 1983 62 patients of the Orthopedic University Hospital Berlin were operated for a ventral fusion of the lumbar column, excluded the Dwyer spondylodesis indicated in lumbar scoliosis. 50 of them could be re-examined. The result was good and fair in seventy per cent; the consolidation rate 62 per cent in no relation to the clinical result. Best satisfaction was got by those patient who suffered from spondylolisthesis without any compressions of sciatic nerve. Any previous operation of the nerve root with persistent symptoms lowers the aim of spondylodesis as a salvage procedure. With the experience of the surgeon the method itself is without a higher rate of complication than any other way of spondylodesis.

Adolescent↗
PubMedDate not supplied

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