Hyun Jun Yoon

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STUDY OBJECTIVE To determine the autonomic changes associated with pneumatic tourniquet-induced hypertension as measured by power spectral heart rate analysis (PSHR). DESIGN Prospective study. SETTING Tertiary teaching hospital. PATIENTS 21 healthy-patients scheduled for lower extremity surgery, during which pneumatic tourniquet inflation was expected(More)
The influence of regional anaesthetic technique on the incidence of lower extremity tourniquet pain was evaluated. We studied 60 patients undergoing orthopaedic procedures of the lower extremity with the use of a pneumatic tourniquet and anticipated inflation of 60 min or longer. Three different anaesthetic techniques were selected by random and draw;(More)
STUDY OBJECTIVE To evaluate heart rate (HR) variability in the prone position with power spectral heart rate (PSHR) analysis during spinal and general anesthesia. DESIGN Prospective, clinical evaluation of HR variability in the prone position. SETTING Tertiary care teaching hospital. PATIENTS 20 healthy, ASA physical status I and II patients scheduled(More)
BACKGROUND AND OBJECTIVES Although the majority of elective lumbar spine surgical procedures are performed under general anesthesia, successful use of spinal and epidural anesthesia has been reported. This study was designed to evaluate the influence of baricity on the performance of spinal anesthesia for lumbar spine surgery. METHODS The study was(More)
ImageS region containing bony defects of approximately 2×3 cm using a regraft from amputated soft tissue of the forehead. Thus, we obtained a good treatment outcome without using previously reported treatment methods such as a tie-over dressing although vascular anastomosis could not be performed in our case. Here, we report on our treatment outcomes. In(More)
STUDY OBJECTIVE To evaluate a large series of elective lumbar spine surgical procedures by a single surgeon whose patients were all offered spinal anesthesia. DESIGN Retrospective chart review. SETTING Tertiary-care teaching hospital. MEASUREMENTS AND MAIN RESULTS The records of all elective lumbar spine procedures between 1984 and 1995 performed by(More)
BACKGROUND AND OBJECTIVES Interscalene brachial plexus block is performed in the groove between the anterior and middle scalene muscles at the level of C6, just over the transverse process. Injection occurs within 1-2 cm of the dural sleeve and could be misdirected into the epidural, subdural, or subarachnoid spaces. METHODS Interscalene block was(More)
BACKGROUND AND OBJECTIVES Interscalene block has produced appropriate anesthesia for shoulder surgery. Success is partly determined by the quality of motor block achieved. This study was designed to evaluate the influence of alkalinization of mepivacaine on the quality of motor block achieved with interscalene brachial plexus anesthesia. METHODS The study(More)
PURPOSE Ankylosing spondylitis is associated with pathophysiology that has important anaesthetic implications. We report a case where the sequelae of ankylosing spondylitis may have been responsible for massive bleeding during emergency spine surgery. CLINICAL FEATURES A 69 yr old man with long standing ankylosing spondylitis sustained a complex fracture(More)