Biomedical subjects

S Oglevie

Publications and source records attributed to S Oglevie.

6 recordsLinked to original sources

PubMed2000

Minipercutaneous nephrolithotomy.

PURPOSE: To evaluate the safety and efficacy of a minipercutaneous nephrolithotomy procedure (mini-PCNL) through a 20F sheath. PATIENTS AND METHODS: Twenty-one patients underwent a mini-PCNL from October 1997 to October 1999. The mean number of calculi was 1.8 (range 1-9). The mean cross-sectional area of the stone burden was 2.8 cm2 (range 0.72-6.5 cm2). Nephrostomy tract dilation was performed with an 18F Cook Omega or Pursuit balloon dilation catheter (6-mm diameter, 10-cm length; 12 or 14 atm, respectively), and a 20F nephrostomy sheath was advanced over the inflated balloon. RESULTS: The mean operative time was 54 minutes. The mean decrease in hematocrit was 3.4%, and no patient required a blood transfusion. The mean percutaneous tube duration was 22 hours. The mean hospital stay was 1.1 days. The single-procedure stone-free rate was 90%. Two patients underwent successful SWL of residual middle-caliceal calculi that could not be accessed through the existing tract. There were no major complications, but there was one episode of prolonged fever secondary to atelectasis. Five patients remain free of radiographic or symptomatic recurrence after antegrade endopyelotomy for ureteropelvic junction obstruction after a mean of 11 months' follow-up. CONCLUSIONS: By using a 20F sheath rather than the traditional 30F sheath, we decreased the volume of renal parenchyma that is dilated by 56%. This change appears to decrease perioperative bleeding and pain as well as parenchymal scarring.

Adult↗

PubMed1999

Combination of pressure and velocity parameters in the non-invasive diagnosis of aorto-iliac disease.

Three different femoral artery flow velocity parameters in combination with segmental pressure measurements were evaluated for their respective diagnostic value in identifying the presence or absence of hemodynamically significant aorto-iliac disease. A total of 60 patients (119 legs) were examined both non-invasively and with arteriography. Doppler flow velocities were recorded using a 5-MHz CW Doppler velocity metering system. Of the three parameters used (peak velocity, decay time and deceleration), a decay time of 220 ms yielded the most practical discriminant value. The accuracy increases when in addition the upper thigh/arm pressure ratio values are considered. The results indicate that the combination of femoral artery decay time with the upper thigh/arm pressure index provides a simple and accurate non-invasive screening method to confirm or rule out aorto-iliac disease. This helps to determine whether the patient is a candidate for arteriography and for potential surgical intervention.

Aorta↗

PubMed1994

Ultrasound guided biopsy of nonpalpable and difficult to palpate thyroid masses.

We reviewed our experience with ultrasound-guided biopsies of masses of the thyroid gland that were either nonpalpable or difficult to localize by palpation to evaluate the technique and correlate the results. Thirty-two biopsies were performed upon 25 patients whose clinical presentations were palpable nodule (six patients), throat discomfort (two patients), postpartial thyroidectomy follow-up evaluation (two patients), incidental discovery of a mass--by ultrasound of the neck (two patients), roentgenogram of the chest (two patients), computed tomography of the chest (one patient) and during tracheostomy placement (one patient). Other presentations were eliminate infection (one patient), odynophagia (one patient), hoarseness (one patient), cold nodule on a nuclear medicine study (one patient), hyperparathyroidism (one patient), rule out metastasis from carcinoma of the colon (one patient), persistent cough (one patient), enlarged thyroid gland (one patient) or family history of carcinoma of the thyroid gland (one patient). Fifteen patients had nuclear medicine studies showing either a cold nodule (ten patients), multinodular goiter (one patient), normal examination (two patients), hot nodule (one patient) or no thyroid gland activity (one patient). The ultrasound examinations showed either a hypoechoic nodule (25 patients), inhomogeneous or mixed echogenic nodule (six patients) or a hyperechoic nodule with hypoechoic rim (one patient). The nodules ranged in size from 3 milliliters to 7 centimeters. Twenty-six lesions were less than 3 centimeters in diameter; of the other six, four were substernal goiters. Six patients had a previous nondiagnostic biopsy directed by palpation only. Biopsy was performed using real-time ultrasound guidance with various needles. One patient had a small hematoma, which was the only complication in the study. The results of the biopsies were diagnostic in 26 of 32 patients. The final diagnosis was benign follicular cells (ten patients), adenomatous nodule (seven patients), follicular neoplasm (three patients), colloid cyst (two patients), aspergillus (two patients), fibrosis (one patient) and papillary carcinoma (one patient). Six of the biopsies yielded unsatisfactory specimens. One of the patients with a diagnosis of benign follicular cells on biopsy had a follicular carcinoma after surgical pathologic factors were obtained; that was the only false-negative result. We conclude that ultrasound-guided biopsy of the thyroid is a safe and useful method of evaluating nonpalpable and difficult to palpate thyroid masses.

Adolescent↗

PubMed1993

Anterior mediastinal lesions: transsternal biopsy with CT guidance. Work in progress.

PURPOSE: To assess the technique, results, and patient tolerance of transsternal biopsy of anterior mediastinal lesions under computed tomographic (CT) guidance. MATERIALS AND METHODS: Seven patients (four women and three men) with anterior mediastinal lesions underwent eight transsternal biopsies. Patients were included in the study if there was a risk of injury to internal mammary vessels or a danger of tranversing the lung by the biopsy needle. Patients were specifically questioned about the pain caused by the transsternal needle. A pain scale was not used. Conscious sedation and local anesthesia requirements provided gross evaluation of the patients' tolerance to the procedure. CT scans were used to guide and confirm optimal alignment of the transsternal needle with the lesion. RESULTS: Patients experienced minimal discomfort when the sternum was traversed. No instances of pneumothorax, postprocedural pain, or infection were encountered. In six of the seven patients, biopsy specimens were diagnostic. CONCLUSION: The transsternal approach for biopsy of anterior mediastinal lesions appears safe and is well tolerated.

Biopsy, Needle↗

PubMed1989

[Roentgen pathology of blunt bronchial injuries].

We present eight patients with bronchial injuries. The pertinent radiographic findings were subdivided into: (1) signs pertinent to the bronchial tree; (2) signs due to airleak; (3) signs made in the subtended lung. The radiologist plays an important role in the early diagnosis of this severe injury.

Adolescent↗

PubMedDate not supplied

[A comparative multicenter study of the efficacy of single- and double-lumen catheter drainage].

Our study was aimed at comparing the therapeutic efficiency of single and double lumen catheters in the drainage of abdominal fluid collections. We report the results of in vitro and in vivo studies carried out to assess the usefulness of each catheter type based on its therapeutic results. In the in vitro study the aspiration efficacy of the catheters was tested in a simulated cavity. In the in vivo study 188 patients with 206 fluid collections in the abdomen were examined; the patients had been treated percutaneously with single or double lumen catheters, randomly. In each patient we studied drainage efficiency related to aspiration efficacy, the time the catheter rested in the cavity, patient's discomfort and finally the cost of both the device and hospitalization. Some patients underwent surgery for specific reasons, but nevertheless their clinical conditions were absolutely improved thanks to percutaneous drainage. The results of this study yield useful clinical data to choose the most suitable catheter for the percutaneous treatment of abdominal fluid collections. Single lumen catheters work better than double lumen ones, the latter being also more expensive. Hospitalization time is also reduced when single lumen catheters are used.

Adolescent↗