Surgery of descending thoracic aortic aneurysms with centrifugal pump support

P. Biglioli, R. Spirito, M. Agrifoglio, G. Pompilio, A. Parolari, L. Dainese, V. Arena, A. Sala

Research output: Contribution to journalArticle

Abstract

Fifty-five patients with descending thoracic aortic aneurysms were operated upon between October 1987 and October 1994. All patients were supported by a centrifugal pump during operation. The mean (s.d.) duration of cross-clamping was 39(13) min. In order to evaluate the efficacy of the centrifugal pump, haemodynamic and metabolic measurements were made on four occasions (before cross-clamping, immediately after cross-clamping and before crossclamp removal) and again after cross-clamp removal. The haemodynamic data remained stable throughout the procedure: central venous pressure (15(4.6) versus 16(4.8) versus 16(4.6) versus 15(4.6) mmHg; P = n.s.), pulmonary artery pressure (25(6.2) versus 24(5.1) versus 22(5.3) versus 23(4.4) mmHg; P = n.s.), radial systolic pressure (119(19.9) versus 116(25.2) versus 111(25.9) versus 111(20.7) mmHg; P = n.s.) and heart rate (75(12.6) versus 77(14) versus 76(15.6) versus 78(16) beats/min; P = n.s.). The acid-base status deteriorated slowly during surgery. Values before and after cross-clamping were: pH (7.42(0.04) versus 7.37(0.06); P <0.05), base excess (-0.67(2.20) versus -3.70(2.50); P <0.05) and bicarbonates (24(8.9) versus 20(1.9); P <0.05). The cerebrospinal fluid pressure remained constant: 20(5.7) versus 19(5.9) versus 18(5) versus 19(5) mmHg; P = n.s. Renal function, measured before, and at 1, 3 and 7 days after the operation also remained stable (creatinine: 1.1(0.4) versus 1.2(0.4) versus 1.2(0.4) versus 1.2(0.4); P = n.s.; blood urea nitrogen: 46(18.7) versus 46(18.6) versus 51(24.9) versus 55(27.9); P = n.s.). Step-wise multiple linear regression comparing cerebrospinal fluid pressure against haemodynamic and metabolic data showed that during aortic cross-clamping there was a significant relationship between central venous pressure (P <0.0013) and arterial pH (P <0.0148), while before and after cross-clamping multivariate analysis showed a relationship only between central venous pressure and cerebrospinal fluid pressure (P <0.0035). The results confirm that centrifugal pump support is effective in stabilizing haemodynamics and protecting the kidney during thoracoabdominal aneurysm repair.

Original languageEnglish
Pages (from-to)99-103
Number of pages5
JournalCardiovascular Surgery
Volume5
Issue number1
DOIs
Publication statusPublished - Feb 1997

Keywords

  • centrifugal pump
  • descending thoracic aorta aneurysm
  • surgery

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Radiology Nuclear Medicine and imaging
  • Surgery

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