Ultraschall in der Medizin : Organ der Deutschen Gesellschaft für Ultraschall in der Medizin, [der] Österreichischen Gesellschaft für Ultraschall in der Medizin, [der] Schweizerischen Gesellschaft für Ultraschall in Medizin und Biologie
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Comparative Study
[Diagnostic value of transthoracic ultrasound compared to chest radiography in the detection of a post-interventional pneumothorax].
Chest radiography is standard for the diagnosis of a pneumothorax. However, also ultrasound of the chest has considerable value in the detection of a pneumothorax. A typical sonographic feature is the lack of the lung gliding sign. Aim of our trial was to evaluate the significance of ultrasound of the chest in the diagnosis of a pneumothorax supplemented by using power colour Doppler imaging. ⋯ Transthoracic ultrasound of the chest is a highly sensitive and specific diagnostic tool in the diagnosis of a pneumothorax. In comparison to chest radiography, it is better available and prevents administration of ionizing radiation. However, a disadvantage of ultrasound is the lack of quantification of a pneumothorax and the assessment of the indication for chest tube drainage.
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Hand transplantation is challenging, especially with respect to postoperative care. Serious complications including rejection of the transplant are possible. To date, imaging has relied mainly on plain radiography, CT and MRI. High-resolution ultrasound (HRUS) has the potential to be a quick, cost-effective and dynamic alternative at least for the initial assessment of most of these complications. We report on our experience with HRUS in three patients after bilateral hand/forearm transplantation. ⋯ Based on our experience, we recommend sonography as a first-line modality for the follow-up of patients who underwent composite tissue allografting. HRUS allows the reliable and timely diagnosis of relevant complications and the monitoring of postoperative changes and sets the course for therapy or further more invasive imaging.
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This pilot study aims to assess the viability of using contrast-enhanced ultrasound (CEUS) in renal grafts while they are on hypothermic perfusion machines prior to transplantation. We assessed the vascularity and renal perfusion of machine-perfused porcine kidneys (Maastricht category II) using CEUS. ⋯ CEUS appears to be a viable technique for assessing global perfusion and small defects within kidneys prior to transplantation. The flow patterns seen in vitro appear to correspond to those seen in vivo. Further work is required to evaluate the relevance of the flow dynamics measured.
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Comparative Study
High resolution ultrasound and magnetic resonance imaging of the optic nerve and the optic nerve sheath: anatomic correlation and clinical importance.
We performed a cadaver study to evaluate the accuracy of measurements of the optic nerve and the optic nerve sheath for high resolution US (HRUS) and magnetic resonance imaging (MRI). ⋯ If decisive anatomic structures are clearly depicted and the measuring points are set correctly, there is a good correlation between HRUS and MRI measurements of the optic nerve and the ONSD even on transbulbar sonography. As most of the standard and cut-off values that have been published for ultrasound are significantly lower than the results obtained with MRI, a reevaluation of sonographic ONSD measurement with correlation to MRI is necessary.