يعرض 1 - 10 نتائج من 13 نتيجة بحث عن '"Stephen W. Carmichael"', وقت الاستعلام: 1.53s تنقيح النتائج
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    المصدر: Clinical Anatomy. 20:201-208

    الوصف: There is neither consensus on the number nor agreement on the location of the anatomic compartments of the foot. This project utilized high-resolution magnetic resonance imaging (MRI) to identify foot compartments. The purpose of this study was to devise a new system using 3-Tesla (3T) MRI that assessed the number and location of these compartments. Six feet from healthy volunteers were imaged. From these, 10 compartments were described: (1) medial, (2) calcaneal, (3) lateral, (4) central superficial, (5) central deep (adductor), (6–9) interossei, and (10) skin. The 3T MRI and foot/ankle coil allowed us to assess the number and location of foot compartments. Clin. Anat. 20:201–208, 2007. © 2006 Wiley-Liss, Inc.

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    المصدر: Clinical Anatomy. 17:45-49

    الوصف: The purpose of this study was to determine if various lithotomy positions increase strain on the obturator and lateral femoral cutaneous nerves in fresh adult cadavers. A static load cell was used to record strain changes of the obturator and lateral femoral cutaneous nerves in the pelvis and anterior thigh when the lower limbs were placed in three sets of positions of varying hip abduction and flexion. The means of the strain measurements, which were measured in grams in all positioning angles were compared to the baseline 0 degrees measurements. Analysis of variance was calculated for the differences. Flexion of the hip did not increase strain on either nerve. Abduction to 30 degrees or 45 degrees increased strain by more than 30 g on the obturator nerve (P0.05) but not the lateral femoral cutaneous nerve. The addition of 45 degrees or more of flexion to abduction negated the strain increase on the obturator nerves seen with abduction alone. Nerve strain30 g has been associated consistently with nerve dysfunction, disrupting axonal transmission, and causing structural neural damage. Our findings suggest that concomitant hip flexion should be used when placing anesthetized patients in a lithotomy position that includes abduction of the lower limbs to30 degrees to decrease the risk for perioperative neuropathy of the obturator nerve.

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    المصدر: Annals of Plastic Surgery. 38:604-610

    الوصف: Various free flaps have been utilized in the thigh region, however there are few systematic clinicoanatomic studies of the thigh region. The purpose of this study is to clarify the clinicoanatomic characteristics of the free septocutaneous thigh flap. Forty-two dissections were carried out in unenbalmed cadavers. The pedicle was observed in all specimens in the anterolateral thigh (ALT), medial thigh, gluteal thigh, and lateral thigh flaps. The pedicle was observed in 46% of the specimens in the anteromedial thigh flap. The pedicle was observed in 86% of the specimens in the posterior thigh flap. The pedicle length (153 +/- 23 mm) of the ALT flap was the longest pedicle in the thigh flaps. The internal diameter of the pedicle of the ALT flap (3.0 +/- 1.0 mm), which could be used for anastomosis, is the largest in the septocutaneous thigh flaps. The clinicoanatomic characteristics of thigh flaps are clarified.

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    المصدر: Academic Medicine. 80:349-351

    الوصف: The current shortage of faculty qualified to teach anatomy in U.S. medical schools is reversible. Sufficient numbers of individuals are in the pipeline to provide a future cadre of well-trained faculty members educating students in gross anatomy. The challenge is to realign departmental, institutional, and federal training grant priorities and resources, creating incentives for graduate students, postdoctoral fellows, and faculty members to stay the course and become the teachers needed to educate the next generation of health professionals. These strategies include (but are not limited to) team-teaching gross anatomy, thereby distributing the time commitments of a laboratory-based course more widely within a department; funds made available from the administration of medical schools to allow postdoctoral fellows to participate in teaching and providing compensation for the research activities; using "mission-based budgeting" to specifically compensate for faculty teaching time; and, finally, re-instituting federally funded training grants that solved this same teaching crisis in the not-too-distant past.

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    المصدر: Annals of Emergency Medicine. 44:320-322

    الوصف: We report a case of massive tongue engorgement associated with placement of an esophageal-tracheal twin-lumen airway device (Combitube) in a morbidly obese patient. Approximately 4 hours after atraumatic placement of the Combitube, tongue swelling occurred. An emergency tracheostomy was needed for airway management before removal of the Combitube. Ischemia-reperfusion injury or compression of glossal blood vessels, specifically lingual veins, was the most likely cause for the patient's tongue engorgement. An exhaustive search for other causes revealed nothing. Prolonged use of the Combitube may incur greater risk of airway complications such as tongue engorgement.

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    المصدر: The American Journal of Surgery. 166:130-135

    الوصف: Reconstruction of the arteries of the foot in patients with severe chronic arterial occlusive disease has become a routine and valuable procedure. However, it is frequently difficult to select the optimal site for the distal arterial anastomosis. In order to determine the most important anatomic variations of foot arteries and the relationship of the dorsalis pedis artery to crossing tendons, the following study was performed in 30 cadaver limbs of 17 persons (9 men and 8 women). Their mean age at death was 69.8 years (range: 42 to 93 years). Methods to evaluate anatomy included anatomic dissection, arteriography, and preparation of corrosion cast models. The latter was performed by injection of liquid plastic and catalyst into the tibial arteries followed by chemical débridement of the soft tissue of the foot. Photographs of the corrosion cast models were taken at various stages of soft tissue dissolution. The dorsalis pedis artery was absent in 6.7% of the cases, and the arcuate artery was absent in 33%. The dorsalis pedis artery arose from the peroneal artery in 6.7%. The dorsalis pedis artery crossed under the extensor hallucis longus tendon at the ankle in 54%, above the ankle in 43%, but below the ankle in only 3%. Our study suggests that the optimal site for the dorsalis pedis artery anastomosis on the foot is the segment distal to the ankle.

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    المصدر: Clinical anatomy (New York, N.Y.). 17(4)

    الوصف: The assistance of third-year medical students (MS3) may be an easy, inexpensive, educational method to decrease physical and emotional stress among first-year medical students (MS1) on the first day of gross anatomy dissection. In the academic years 2000-2001 and 2001-2002, a questionnaire on the emotional and physical reactions on the first day of dissection was distributed to 84 MS1 at Mayo Medical School (Rochester, MN); 74 (88%) responded. Student perceptions were assessed on a 5-point Likert scale. The 42 second-year medical students (MS2) whose first academic year was 1999-2000 were used as a control group, because they had not had assistance from MS3. MS2 completed the same questionnaire (59% response rate). Data were collected from MS1 on the day of their first gross anatomy dissection. The most frequent reactions were headache, disgust, grief or sadness, and feeling light-headed. Significant differences (alpha < 0.05) were found with use of the chi(2) test to compare the emotional and physical reactions of MS1 and MS2. MS1 had significantly fewer physical reactions (64% vs. 88%), reporting lower levels of anxiety (23% vs. 48%), headache (14% vs. 36%), disgust (9% vs. 20%), feeling light-headed (11% vs. 24%), and reaction to the smell of the cadaver and laboratory (8% vs. 52%). MS1 commented that having MS3 at the dissection table was extremely helpful. They relied less on their peers and felt they learned more efficiently about the dissection techniques and anatomical structures. Using MS3 as assistants is one method to reduce fear and anxiety on the first day of gross anatomy dissection.

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