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K Hayashida

Publications and source records attributed to K Hayashida.

373 records · Page 21Linked to original sources
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Indicators of superior glenoid labral detachment on magnetic resonance imaging and computed tomography arthrography.

The magnetic resonance imaging and computed tomography arthrographic findings of 36 shoulders with arthroscopically diagnosed detachment of the superior labrum were compared with those of 40 shoulders with a normal superior labrum to detect any findings specific to the injury. In this study we defined a specific magnetic resonance imaging finding as the presence of a linear, high-to-intermediate intensity area between the superior labrum and the glenoid rim on oblique coronal T2-weighted images. We also defined a specific computed tomography arthrography finding as air entering between the superior labrum and the upper part of the glenoid surface. On the basis of these findings magnetic resonance imaging had a sensitivity of 41%, a specificity of 86%, and an accuracy of 63%, whereas computed tomography arthrography had a sensitivity of 45%, a specificity of 93%, and an accuracy of 73%. Thus both of these procedures were specific for these particular findings, but they were neither sensitive nor accurate.

Adolescent↗
PubMedDate not supplied

Surgical treatment of hallux valgus deformity in rheumatoid arthritis: clinical and radiographic evaluation of modified Lapidus technique.

The authors evaluated a modified Lapidus technique for 21 rheumatoid hallux valgus deformities. The technique corrects the deformity by performing arthrodesis of the first tarsometatarsal joint and preservation of the first metatarsophalangeal (MTP) joint. The authors clinically studied patients' subjective improvement of pain and footwear comfort, as well as their satisfaction with the outcome of the surgery. The study also analyzed radiographic changes of the hallux valgus angle (HVA) and two intermetatarsal angles, one between the first and the second (M1/2) and the other between the first and the fifth (M1/5). They were measured before the surgery, 3 weeks after the surgery, and at the last follow-up. Pain relief was great or moderate in 17 feet and footwear comfort was improved in 16 feet. Fifteen patients were satisfied or satisfied with some reservations. The average HVA significantly decreased from 44.1 degrees preoperatively to 10.6 postoperatively and significantly increased again to 29.1 at the last follow-up. The average M1/2 and M1/5 significantly decreased postoperatively (from 13 to 8.3 and from 32.2 to 21.1, respectively), and the reduction of M1/2 remained at the last follow-up (8.7), while M1/5 significantly increased again (28.3). This modified Lapidus technique is a useful method for rheumatoid hallux valgus deformity, which can preserve the first MTP joint.

Aged↗
PubMedDate not supplied

Autoimmune pancreatitis: radiologic findings in three histologically proven cases.

We describe the radiologic findings of autoimmune pancreatitis, a rare variant of pancreatitis. The radiologic findings of autoimmune pancreatitis are pathognomonic and very different from those of ordinary types of acute or chronic pancreatitis. This condition is a new clinical entity that is effectively treated with steroid therapy. It is important to recognize the radiologic characteristics of autoimmune pancreatitis to avoid surgical resection and start steroid therapy.

Aged↗
PubMedDate not supplied

Viable but denervated right ventricular myocardium: a case of Eisenmenger reaction.

We report on a 47-year-old woman who experienced an Eisenmenger reaction (mean pulmonary artery pressure: 86 mm Hg) induced by atrial septal defect. Radionuclide myocardial scans with 99mTc-MIBI and 123I-BMIPP showed increased uptake to the right ventricular myocardium, whereas the 123I-MIBG scan disclosed no uptake to the right ventricular myocardium. The scans showed no apparent abnormality in the left ventricular myocardium. These findings suggest that the right ventricular myocardium was viable but denervated due to severe pulmonary hypertension. The mechanism of right ventricular failure may be closely related to sympathetic denervation.

Antihypertensive Agents↗
PubMedDate not supplied

Greater tuberosity notch: an important indicator of articular-side partial rotator cuff tears in the shoulders of throwing athletes.

We examined the location of rotator cuff tears, associated labral injuries, and notches on the greater tuberosity of the humeral head in shoulders of throwing athletes. Arthroscopic findings (rotator cuff tear, labral condition, and greater tuberosity notch) as well as other factors (duration of playing baseball, range of motion, and joint laxity) of 61 baseball players were retrospectively studied. The presence of a greater tuberosity notch was also evaluated for by plain radiographs. Forty patients had articular-side partial rotator cuff tears, most of which occurred in the interval between the supraspinatus and infraspinatus tendons. The existence of a rotator cuff tear was not related to the range of motion, joint laxity, the detachment of the superior glenoid labrum, or posterosuperior labral injury. Greater tuberosity notches were recognized in 38 shoulders by arthroscopy and most were detected on plain radiographs. The presence of a notch was significantly related to the existence of a rotator cuff tear, while the size of the notch was significantly related to the depth and width of the tear. The greater tuberosity notch seems to be one of the most important diagnostic indicators for a rotator cuff tear in throwing athletes.

Adolescent↗
PubMedDate not supplied

Bankart procedure augmented by coracoid transfer for contact athletes with traumatic anterior shoulder instability.

We investigated the clinical efficacy of the Bankart procedure augmented by coracoid transfer for traumatic anterior shoulder instability in athletes playing contact sports. Eighty-three athletes (85 joints) with traumatic anterior shoulder instability who underwent the combined procedure were studied. The mean patient age at surgery was 21 years, and the mean follow-up period was 5.8 years (range, 2 to 12). According to the Rowe scoring system, the clinical results were graded as excellent for 58 shoulders, good for 21, fair for 5, and poor for 1, with an average score of 91 points. The overall success rate was 93%. A complete return to contact sports was achieved by 73 of the 83 patients (88%). The average loss of external rotation was 15 degrees with the arm at the side and 7 degrees with the arm in 90 degrees of abduction. The complications were nonunions in two cases, screw breakage in one case, and axillary nerve injury in one. This procedure can achieve a good clinical outcome for contact athletes with traumatic anterior shoulder instability.

Adolescent↗