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C Hemmingsen

Publications and source records attributed to C Hemmingsen.

21 records · Page 2Linked to original sources
PubMed1991

CVP catheter electrocardiography: an alternative to radiographic control after cannulation of central veins?

We evaluated 160 electrocardiograms taken after placement of central venous catheters (CVC) to determine their locations. Usable recordings were obtained in 154 patients. Subsequent radiographs revealed 30 misplaced catheters. Twenty-five of those were detected by CVC electrocardiograms. There were five false positive and five false negative traces. The sensitivity of CVC electrocardiography was 96%, the specificity 83.3%, and the total predictive power 93.5%. Electrocardiograms obtained from guide-wires were of significantly better quality than those from 0.9% NaCl filled catheters. The technique is accurate, safe and easy to learn. It may reduce the need for routine radiographic control to less than 10% of patients.

Adolescent↗
PubMed1989

Prophylactic ephedrine during spinal anaesthesia: double-blind study in patients in ASA groups I-III.

Forty-eight patients scheduled to undergo spinal anaesthesia were allocated to three groups of 16 each according to ASA classification I-II-III. Each patient received a fluid load of 7 ml kg-1 and either ephedrine 12.5 mg i.v. and 37.5 mg i.m., or placebo. Twelve patients in the placebo groups developed a maximal decrease in mean arterial pressure exceeding 20%. Five of these (one in ASA II and four in ASA III) developed a decrease exceeding 33% and required treatment. In ASA risk group III, all patients in the placebo group had a decrease in mean arterial pressure exceeding 20%; in 50% of these patients, the decrease exceeded 33%. We conclude that prophylactic ephedrine is desirable for spinal anaesthesia, especially in ASA III patients.

Anesthesia, Spinal↗