title: Complications of intra-aortic balloon pump use: does the final position of the IABP tip matter?
abstract: We report results of a retrospective review of intra-aortic balloon pump (IABP) use in two Australasian centres and evaluate the effect of final IABP tip position on outcome. Indications for counterpulsation, patient demographics and in-hospital outcomes and complications were retrospectively collected. The chest X-ray reports provided the 'final' position of the IABP tip. The position was defined as acceptable (tip was seen just below the aortic arch, at T2-T5 vertebrae), malpositioned (tip > 5 cm below aortic arch or at T5-T6) or severely malpositioned (tip > 10 cm below aortic arch or at T7 or below).?Major complications were considered a composite of death secondary to IABP, major limb ischaemia, major IABP malfunction, balloon rupture or haemorrhage, severe renal dysfunction (rise in creatinine > 200 µmol/l), stroke and mesenteric ischaemia. Six hundred and forty-five cases were reviewed. The overall major complication rate was 26.2% and 24.3%. Severe renal impairment was the most common complication (16.6%), and second, severe catheter dysfunction (5.4%). ?Final IABP position was acceptable in 39.9%, malpositioned in 11.1%,?severely malpositioned in 6.7% and unavailable for 42.4%. Logistic regression analysis showed IABP tip malposition (compared with satisfactory position odds ratio=3.9 [95% confidence interval=2.0-7.6, P < 0.001] and severely malpositioned odds ratio=13.0 [95% confidence interval 5.3-31.7, P < 0.001]) was associated with major complications more than the presence of shock (odds ratio=3.8, confidence interval=2.1-6.8 P < 0.001). The acceptance of a less-than-ideal final position was highly predictive of morbidity directly related to IABP device therapy.
authors.affiliation: Cardiology and Intensive Care, Christchurch School of Medicine, University of Otago, New Zealand.
authors.forename: M
authors.initials: M
authors.lastname: Siriwardena
authors.affiliation: Christchurch School of Medicine, University of Otago, New Zealand.
authors.forename: A
authors.initials: A
authors.lastname: Pilbrow
authors.affiliation: Christchurch School of Medicine, University of Otago, New Zealand.
authors.forename: C
authors.initials: C
authors.lastname: Frampton
authors.affiliation: Department of Radiology, Christchurch Public Hospital, Christchurch, New Zealand.
authors.forename: S M
authors.initials: SM
authors.lastname: MacDonald
authors.affiliation: Department of Cardiology, Dunedin Public Hospital, Dunedin, New Zealand.
authors.forename: G T
authors.initials: GT
authors.lastname: Wilkins
authors.affiliation: Department of Cardiology, Christchurch School of Medicine, University of Otago, New Zealand.
authors.forename: A M
authors.initials: AM
authors.lastname: Richards
mesh_terms: D000368:Aged; D001315:Australia; D004868:Equipment Failure / Q000706:statistics & numerical data*; D005260:Female; D006470:Hemorrhage / Q000209:etiology; D017052:Hospital Mortality; D006801:Humans; D007423:Intra-Aortic Balloon Pumping / Q000009:adverse effects* / Q000295:instrumentation*; D007511:Ischemia / Q000209:etiology; D007674:Kidney Diseases / Q000209:etiology; D008297:Male; D016017:Odds Ratio; D013902:Radiography, Thoracic / Q000379:methods; D012189:Retrospective Studies; D012307:Risk Factors; D020521:Stroke / Q000209:etiology; D016896:Treatment Outcome
keywords: cardiogenic shock; counterpulsation; intra-aortic balloon pump; mechanical support