Jonathan B. Mark

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Since the introduction of transesophageal echocar-diography (TEE) to the operating room in the early 1980s, 1-4 its effectiveness as a clinical monitor to assist in the hemodynamic management of patients during general anesthesia and its reliability to make intraoperative diagnoses during cardiac operations has been well established. 5-26 In recognition of(More)
T here are no objective criteria for selecting the size of a double-lumen endobronchial tube (DLT) (1). An inappropriately sized DLT can cause airway trauma and interfere with oxygenation and lung separation during one-lung ventilation. The goal of this study was to determine if measurement of tracheal diameter from the preoperative chest radiograph can be(More)
Pressure monitoring systems influence the contour of the displayed wave-forms and, on occasion, can introduce significant artifact in the pressure traces. It is important to understand the technical details of invasive pressure monitoring to interpret better the information presented. Careful observation of the arterial pressure waveform can provide(More)
Sixteen consenting patients scheduled for elective thoracotomy were enrolled into a randomized trial of epidural morphine and hydromorphone. Each patient had a lumbar epidural catheter placed preoperatively for the purpose of post-thoracotomy analgesia. Shortly before the end of the operative procedure each patient received 5 mg of morphine and 0.75 mg of(More)
Introduced in 1977, transesophageal echocardiography (TEE) offered imaging through a new acoustic window sitting directly behind the heart, allowing improved evaluation of many cardiac conditions. Shortly thereafter, TEE was applied to the intraoperative environment, as investigators quickly recognized that continuous cardiac evaluation and monitoring(More)
Right Ventricle Compared to TEE assessment of left ventricular function, echocardiographic evaluation of the right ventricle (RV) is complicated by the non-geometric, asymmetric, crescent-shape of this chamber, which precludes easy application of quantitative methods. Since the long and short axes of the RV are defined by the corresponding views of the left(More)
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