An abnormal TEE on bypass.
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Cardiopulmonary Bypass↗
Biomedical subjects
Christoph Schelenz
Publications and source records attributed to Christoph Schelenz.
Time-variant investigation of quadratic phase couplings caused by amplitude modulation in electroencephalic burst-suppression patterns.
OBJECTIVE: Several studies suggest that parameters derived from bispectral analysis of the EEG can be used to characterize specific cortical activation states represented by non linear interaction between brain electrical oscillations. For example, it was shown that so-called bispectral indices can be used to assess the depth of sedation. The methods applied so far are based on interval-related procedures of bispectral analysis. Consequently, the use of the resulting parameters for on-line monitoring or investigations of signal properties during transition periods, e.g., when entering burst-suppression periods, is restricted. The objective of this paper is to provide the methodological basis for a time-continuous (on-line) investigation of quadratic phase coupling induced by amplitude modulation. METHODS: To accomplish this aim an algorithm is presented which enables the analysis of the temporal development in the degree of amplitude modulation (DAM), e.g., during the transition to burst-suppression periods in patients with severe neurological diseases. RESULTS: It was found that these periods are associated with increasing DAM compared with the baseline conditions.
Algorithms↗
Myocardial infarction with chest pain and paraplegia.
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Adult↗
Case report: the malfunctioning implanted venous access device.
Totally implanted venous access devices (VADs) are an alternative to central line placement for those patients requiring frequent intravenous access. Venous thrombosis, infection, extrusion, extravasation and occlusion are commonly encountered complications of central VADS. Fracture with embolization of implantable venous access catheter is a rare complication of this commonly used device, but it may have serious consequences. Clinical manifestation may include infraclavicular or chest pain, paraesthesias in the arm, cardiac arrhythmias, palpitation or an extra heart sound, in addition to withdrawal occlusion, swelling, and resistance to infusion. Nursing staff should be aware of these signs and symptoms and they should immediately stop any infusion if these signs and symptoms emerge. Whenever problems with a VAD occur a chest radiograph or a contrast enhanced angiographic control of the VAD is advised. This article provides two cases relating to malfunction of a VAD. Despite typical symptoms in both cases a catheter fracture with embolization was not taken into consideration, and a radiological control of the VAD was not performed. It was only by chance that the patients did not sustain any harmful sequels from the broken VAD.
Adult↗