摘要:

Radionuclide venography (RNV) is an accepted, reliable, and simple method for detecting thrombi of the deep venous system of the lower extremity. No universal agreement, however, has been established regarding specific techniques for tourniquet applications. In fact, present data reflect a general consensus that tourniquet use and location other than above the ankles has no appreciable or recognizable effect on study outcome. A prospective study was performed on 20 consecutive patients referred for RNV with the clinical impression of deep venous thrombosis (DVT). Each patient was studied initially with tourniquets above the knee and ankle, then with tourniquets above the ankle only, and finally without tourniquets. On the basis of standard criteria for DVT, 8 out of 20 patients were positive for DVT when the study was performed with tourniquets only above the ankle. Four of the eight positive studies became negative, however, when additional tourniquets were placed above the knees (20% false-positive rate). It is concluded that the routine application of additional tourniquets above the knees would eliminate a significant number of falsepositive studies and should be part of an established routine protocol.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

An unusual case of obstruction of the iliac veins by a markedly distended urinary bladder (UB) is presented. Initial radionuclide venography (RNV) was positive, revealing obstruction of the iliac veins associated with marked dilatation of the UB. After the UB was emptied, RNV was negative.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Focal Tc-99m MDP uptake on bone scanning in regions of deep venous thrombosis (DVT) is reported in two patients with documented DVT. It is speculated that this uptake may be related to localized calcification or ossification, which is occasionally observed on radiographs of patients with chronic DVT.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Edema of the lower extremities is a difficult clinical problem. It can be due to stasis, obstruction of the lymphatic channels, increased production of lymph beyond the drainage capacity of the lymphatic vessels. It is often difficult to differentiate between these varieties. Lymphoscintigraphy was performed on 164 patients complaining of swelling of the lower extremities and on 5 volunteers. All patients were injected with 1 mCi of Tc-99m human serum albumin (HSA) intradermally in the medial web of the dorsum of each foot. Data were acquired dynamically for both inguinal regions for 45 minutes, and static images of the legs, thighs, and pelvis were taken at 90 minutes. Time activity curves were generated for the equal regions of inguinal nodes on both inguinal sides. The following patterns were recognized: normal (5 volunteers and 57 patients), enhanced (17 patients), stasis with mild obstruction (70 patients), and marked stasis with obstruction (20 patients)

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

An exercise-related avulsion injury of the insertion of the pectineus muscle is described. The abnormality was detected on a 4-hour delayed bone scan. Symptomatic injuries of the adductor muscles are uncommon and are not to be confused scintigraphically with a stress fracture of the proximal femoral shaft.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Fifteen patients at a mean age of 58 underwent adenosine and maximal exercise thallium SPECT imaging. All scans were performed 1 week apart and within 4 weeks of cardiac catheterization. SPECT imaging was performed after the infusion of 140 μg/kg/min of adenosine for 6 minutes. Mean heart rate increment during adenosine administration was 67 ± 3.7 to 77 ± 4.1. Mean blood pressure was 136 ± 7.2 to 135 ± 6.2 systolic and 78 ± 1.8 to 68 ± 2.6 diastolic. No adverse hemodynamic effects were observed. There were no changes in PR or QRS in intervals. Five stress ECGs were ischemic. No ST changes were observed with adenosine. Although 68% of the patients had symptoms of flushing, light-headedness, and dizziness during adenosine infusion, symptoms resolved within 1 minute of dosage adjustment or termination of the infusion in all but one patient, who required theophylline. Sensitivity for coronary artery detection was 77% and specificity 100%. Concordance between adenoscans and exercise thallium scintigraphy was high (13/15 = 87%). In two patients, there were minor scintigraphic differences. The authors conclude that adenosine is a sensitive, specific, and safe alternative to exercise testing in patients referred for thallium imaging and may be preferable to dipyridamole.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

A pulmonary perfusion defect was caused by an extremely large anterior mediastinal mass subsequently proved by I-131 imaging to be an intrathoracic extension of a cervical goiter. Substernal goiter is not known to be reported previously as one of the causes of a perfusion defect in lung scanning.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

A follow-up total-body I-131 scan in a patient with follicular thyroid carcinoma demonstrated radionuclide accumulation in the right hemithorax. Originally thought to be pulmonary metastatic thyroid carcinoma, the uptake region proved to be intrathoracic gastric mucosa. The patient had been treated for squamous cell esophageal carcinoma by esophagogastrostomy reconstruction with gastric pull-up. This unusual imaging pattern could have been interpreted as metastatic disease in the absence of complete patient records, an appreciation of normal gastric concentration patterns of I-131, and corroborative imaging study analysis.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

A 6-year-old girl suffered from intermittent abdominal pain and bile-stained vomiting after undergoing cholecystectomy for perforated gallbladder and bile peritonitis when she was 2 years old. The interesting finding of her choledochal cyst, which was visualized 5 minutes after the injection of Tc-99m disofenin and contracted well after an egg meal, is reported. This finding is inconsistent with those of early reports, which emphasized delayed filling and stasis of radioactivity in the dilated cyst. This case, together with more recent reports in this field, suggests that nuclear images of choledochal cyst, like its clinical presentation, may be quite variable.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Clinically significant lesions originating within a Riedel's lobe are extremely rare. Characteristic findings from a Tc-99m SC liver—spleen scan of metastatic breast carcinoma arising in a Riedel's lobe are described.

ISSN:0363-9762    

出版商:OVID    

年代:1990

数据来源: OVID