Effect of head rotation on overlap and relative position of internal jugular vein to carotid artery in infants and children: a study of the anatomy using ultrasonography.

PURPOSE: The aim of this study was to evaluate the influence of head rotation on the relative anatomy of internal jugular vein (IJV) and carotid artery (CA) in infants and children. MATERIALS AND METHODS: Two hundred pediatric patients (26.5 +/- 23.3 months old) who were undergoing elective surgery were eligible for this consecutive and prospective study. Using 2-dimensional ultrasound, the amount of overlap and the relative position of the 2 vessels were compared between heads in the neutral position and in 90 degrees of rotation. RESULTS: The mean percentage overlap of CA by IJV in the neutral position increased significantly as the head was rotated to the right (23.3% vs 39.2%) and left (35.3% vs 52.8%). The incidence of lateral positioning of IJV to CA decreased significantly when the head was rotated (40% vs 21% in right, 26.5% vs 10.5% in left). The right IJV is associated with less overlap of the CA than the left, regardless of head position. CONCLUSIONS: The head should be kept in as near a neutral position as possible because the overlap increased by head rotation in both sides. In addition, the right IJV should be preferred because of less CA overlap and more lateral positioning than the left.

The duration of intrathecal bupivacaine mixed with lidocaine.

BACKGROUND: Although spinal bupivacaine may have too long duration to be useful in the ambulatory setting, recent animal data suggest that lidocaine added to spinal bupivacaine may reduce the duration of bupivacaine spinal anesthesia. We explored whether lidocaine added to spinal bupivacaine could shorten the duration of bupivacaine spinal anesthesia in humans similarly to what has been reported in animals. METHODS: Ninety patients presenting for transurethral resection of bladder tumor or prostate were assigned to one of three groups by double blind randomization to receive intrathecal 1.5 mL of hyperbaric 0.5% bupivacaine, plus 0.6 mL of one of three solutions: saline (Group I, n = 30, control), 1% lidocaine (Group II, n = 30), and 2% lidocaine (Group III, n = 30). Peak sensory block level, time to peak sensory block, times to two-segment, L1, and S2 regressions from peak sensory block, motor blocks at peak sensory block, L1, and S2 regressions, and postanesthesia care unit stay time (PACU time) were measured. RESULTS: Times to peak sensory block were similar in all three groups. Times to two-segment, L1, and S2 regressions from peak sensory block, and PACU time were significantly reduced in Group II compared to Group I. Times to L1, S2 regressions, and PACU times in Group III were significantly prolonged. CONCLUSIONS: We conclude that lidocaine (6 mg) mixed to spinal bupivacaine (7.5 mg) can shorten the duration of bupivacaine spinal anesthesia, therefore provide more rapid recovery from the spinal anesthesia compared to the same dose of bupivacaine (7.5 mg) alone.

[Psychosocial adjustment of young adult to hemophilia: living like a normal person].

PURPOSE: To explore how young adults in their 20s adjust to hemophilia. METHOD: Grounded theory method guided the data collection and analysis. A purposeful sample of 15 young adults with hemophilia participated during the period of 2000-2001. The data were collected by semi-structured individual interviews, focus group interviews, and participant observations. All interviews were audio taped and transcribed verbatim. Constant comparative analysis was employed to analyze the data. RESULT: "Living like a normal person" emerged as the basic social-psychological process. Two dimensions of the self were identified: normal self and abnormal self. "Living like a normal person" means conscious effort to focus on normal self rather than abnormal self. Five subcategories were identified : 1) pretending as if he is not hemophiliac; 2) relieving the burden; 3) maintaining best physical conditions; 4) becoming independent; and 5) reconciliating with their mothers. CONCLUSION: The results of this study indicate that young adults with hemophilia strive for living a life as a normal person. But there is a question whether it is good for their ultimate quality of life. The results indicate that our society needs to be more tolerant to differences that hemophiliacs have.