IntroductionThe Intra-Aortic Balloon Pump (IABP) is frequently used to mechanically support the heart. There is evidence that IABP improves microvascular flow during cardiogenic shock but its influence on the human microcirculation in patients deemed ready for discontinuing IABP support has not yet been studied. Therefore we used sidestream dark field imaging (SDF) to test our hypothesis that human microcirculation remains unaltered with or without IABP support in patients clinically ready for discontinuation of mechanical support.MethodsWe studied 15 ICU patients on IABP therapy. Measurements were performed after the clinical decision was made to remove the balloon catheter. We recorded global hemodynamic parameters and performed venous oximetry during maximal IABP support (1:1) and 10 minutes after temporarily stopping the IABP therapy. At both time points, we also recorded video clips of the sublingual microcirculation. From these we determined indices of microvascular perfusion including perfused vessel density (PVD) and microvascular flow index (MFI).ResultsCeasing IABP support lowered mean arterial pressure (74 ± 8 to 71 ± 10 mmHg; P = 0.048) and increased diastolic pressure (43 ± 10 to 53 ± 9 mmHg; P = 0.0002). However, at the level of the microcirculation we found an increase of PVD of small vessels <20 μm (5.47 ± 1.76 to 6.63 ± 1.90; P = 0.0039). PVD for vessels >20 μm and MFI for both small and large vessels were unaltered. During the procedure global oxygenation parameters (ScvO2/SvO2) remained unchanged.ConclusionsIn patients deemed ready for discontinuing IABP support according to current practice, SDF imaging showed an increase of microcirculatory flow of small vessels after ceasing IABP therapy. This observation may indicate that IABP impairs microvascular perfusion in recovered patients, although this warrants confirmation.
In a controlled surgical setting, circulatory arrest in humans induces a complete sublingual small microvessel shutdown within 1 min. However, flow in larger microvessels persists. Selective antegrade cerebral perfusion was able to restore microvascular flow to precirculatory arrest levels within a similar timeframe.
A case of a perforated black esophagus treated with minimal invasive surgery is presented. A 68-year-old women underwent a right-sided hemihepatectomy and radio frequency ablation of two metastasis in the left liver lobe. Previous history revealed a hemicolectomy for an obstructive colon carcinoma with post-operative chemotherapy. Postoperatively she developed severe dyspnea due to a perforation of the esophagus with leakage to the pleural space. Video-assisted thoracoscopic surgery (VATS) to adequately drain the perforation was performed. Gastroscopy revealed a perforated black esophagus. The black esophagus, acute esophageal necrosis or Gurvits syndrome is a rare entity with an unknown aetiology which is likely to be multifactorial. The estimated mortality rate is high. To our knowledge, this is the first case published of early VATS used in a case of perforated black esophagus.
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