PubMed Health⌕ Search

Biomedical subjects

N Rodrigues Netto

Publications and source records attributed to N Rodrigues Netto.

13 recordsLinked to original sources
PubMed1992

Extracorporeal shock-wave lithotripsy with Lithostar lithotriptor.

Initial experience of extracorporeal shock-wave lithotripsy (ESWL) using the Lithostar lithotriptor is reported; 193 patients underwent 248 treatments for 210 stones. A total of 139 renal calculi (126 patients) and 71 ureteral stones (67 patients) were analyzed. Treatments were performed without anesthesia in 65 calculi (27.6%), with intravenous sedation in 91 (42.5%), and under epidural anesthesia in 34 calculi (29.9%). A three-month follow-up showed a success rate of 88.0 percent for renal calculi and 95.5 percent for ureteral calculi treated in situ. Renal stone fragmentation was achieved with a mean of 4,890 shocks at 17.4 kV and ureteral calculi were fragmented with a mean number of 4,798 shocks at a mean of 18.3 kV. Auxiliary procedures after ESWL were required in 2 patients with renal stones and in 1 with ureteral calculi. A comparison between stone size and number of shock waves required to achieve stone fragmentation revealed a linear relationship. Hospitalization was not necessary in 84.4 percent of renal calculi and 89.6 percent of ureteral calculi. Retreatments were necessary in 22 (15.8%) of the renal calculi (18 had 2 sessions, 3 had 3 sessions, and 1 had 4 sessions). Of the ureteral calculi, 8 (11.3%) underwent retreatment (6 had 2 sessions, 1 had 3 sessions, and 1 had 4 sessions). The low morbidity with a large number of patients treated on an outpatient basis, minimizing the need for anesthesia, demonstrated a favorable initial successful experience with the Lithostar.

Brazil↗
PubMed1992

Extracorporeal shock wave lithotripsy of radiolucent urinary calculi using the Siemens Lithostar Plus.

Between October 1989 and June 1991, 1,250 patients with urinary calculi were treated at our institution using the Siemens Lithostar. A total of 17 patients (1.37%) with radiolucent or slightly opaque calculi underwent lithotripsy with the Lithostar Plus, which has an overhead electromagnetic generator module and a localization system composed of a real-time on-line 3.5 mHz. ultrasound transducer. The stones were located in the calices in 52.9% of the cases, renal pelvis in 17.7%, ureter in 23.5% and bladder in 5.9%. Followup consisted of a nephrotomogram or ultrasound 1 day and 1 to 3 months postoperatively. Complete removal of all stone fragments was achieved in 76.4% of the cases after 3 months. Retreatment was necessary in 23.5% of the cases. All treatments were performed without anesthesia and hospitalization. Complications were present in 11.8%; perirenal hematoma was noted in 1 patient but this resolved spontaneously within a few days and the same occurred in 1 patient with renal pain. Extracorporeal shock wave lithotripsy using the Lithostar Plus proved to be an effective noninvasive procedure to treat radiolucent and slightly opaque urinary calculi. However, since the Lithostar Plus has a higher power setting, care must be taken to avoid damage with the use of high energy.

Adult↗
PubMed1991

Adjunct controlled inversion therapy following extracorporeal shock wave lithotripsy for lower pole caliceal stones.

The lower calix is responsible for a significant number of kidneys with residual stone fragments after extracorporeal shock wave lithotripsy (ESWL*). To compare the effectiveness of controlled inversion therapy as an adjunctive method to the elimination of calculous fragments, 42 patients who had undergone treatment for lower caliceal stones with a Siemens Lithostar lithotriptor were reviewed. Of the patients 25 had no adjunctive therapy and 17 underwent controlled inversion therapy. The success rate, effectiveness quotient and complication rate were analyzed. Followup consisted of ultrasound and a nephrotomogram 1 day and 1 to 3 months postoperatively. Complete removal of all stone fragments was achieved in 84% of the patients without an adjunctive maneuver and in 64.7% of those treated with controlled inversion therapy. The effectiveness quotient was 72.4% and 35.5%, respectively. The group treated without adjunctive therapy had fewer retreatment sessions and a lower complication rate. There were no complications related to the controlled inversion therapy and patient acceptance was generally enthusiastic. We conclude that controlled inversion therapy did not improve the results of ESWL for lower pole caliceal calculi.

Adolescent↗
PubMed1991

Experimental studies on BCG in hamsters.

The effects of BCG in the treatment of superficial bladder cancer in man are known, but the mechanism is not quite well understood. Thirty-six hamsters received BCG through three routes: intravesical, intradermal and oral. Each group was composed of 12 animals; BCG was administered to 9 and only saline solution to 3 hamsters. BCG was given once a week for six weeks. The animals were sacrificed at 20, 30 and 65 days after the last administration of BCG. The anatomopathologic study revealed granulomatous reaction in the liver of 5 hamsters and in the spleen of 4 other animals of the intravesical group. In all groups that received BCG, hyperplasia of periarteriolar lymphoid tissue (T zone) of the spleen was observed. We support the view that BCG promotes a systemic reaction whatever the route of administration may be.

Administration, Intravesical↗
PubMed1990

Is routine dilation of the ureter necessary for ureteroscopy?

The results of transurethral ureteroscopic stone removal in 144 patients were reviewed. Patients were treated by two different techniques according to the dilation of the ureterovesical junction before the introduction of the ureteroscope. Group 1 was represented by 71 patients submitted to ureteral dilation and in group 2 there were 73 patients treated without ureteral dilation. There was only one failure in introducing the instrument without ureteral dilation. In patients submitted to transurethral ureteroscopy with previous ureteral dilation, the success of ureteroscopic stone removal was 91.6% and complications occurred in 6.9%, and, in the cases not submitted to ureteral dilation, the success rate was 99.4% and the complication rate 4.1%. The success rate achieved in removing upper third stones was 100.0% middle third 90.5% and lower third stones 95.6%. Of the 144 patients treated, 8 (5.5%) had ureteral injury, but only 1 (0.6%) needed open surgery. We do not believe that ureteral dilation prevents complications or improves the results of ureteroscopic lithotripsy.

Adult↗
PubMed1990

Transitional cell carcinoma of the prostate metastatic to penis as cause of priapism.

Prostatic carcinoma metastasising to the penis is a rare occurrence with only 56 cases reported in the literature. The incidence of transitional cell carcinoma arising primarily in the prostate ranges from 1. 5 to 4%. These tumors have uniformly poor prognosis regardless the type of therapy. Most of the patients die within two to six moths and very few survive beyond twelve months. A case of transitional cell carcinoma of the prostate with penile metastases and priapism is presented.

Aged↗
PubMed1988

Colon perforation following percutaneous nephrolithotomy.

Between February 1984 and 1986, 285 patients underwent percutaneous nephrostomy placement followed by track dilation and calculi removal. Although percutaneous colonic perforation is rare, we report a case consequent to this procedure. The patient had a good outcome after surgical management of the damaged colon. This report considers the anatomic aspects for percutaneous nephrostomy placement as well as the auxiliary methods used in diagnosis of lesions of the colon.

Adult↗
PubMed1988

Staghorn calculi: percutaneous versus anatrophic nephrolithotomy.

In a retrospective analysis percutaneous ultrasonic lithotripsy and anatrophic nephrolithotomy for staghorn stones were compared to evaluate morbidity. In 46 patients treated percutaneously and 29 patients treated by open surgery, the procedure time, success rate, complication rate, length of hospitalization, disability period, and amount of analgesics needed in the postoperative period were analyzed. 5 patients treated during the learning period were not considered for this study, no matter whether they were treated by open or percutaneous surgery. Complete removal of all stone fragments was achieved in 73.8% of the patients treated percutaneously. Calculi were removed successfully in 82.1% of the patients submitted to anatrophic lithotomy. The group treated percutaneously showed shorter procedural time (mean 120 versus 210 min), shorter hospitalization period (5 versus 7 days), less need for analgesics (mean 1.6 versus 4.7 doses per patient), and an earlier return to normal physical activities (9 versus 43 days). Among the patients who underwent open surgery, 14 (50.0%) required additional interventions to treat complications. Although in the percutaneous group 28.5% required more than one percutaneous intervention, the overall complication rate per surgery of 20.0% was significantly lower, with no need for open surgery. Percutaneous nephrolithotomy proved to be of significantly lower morbidity than anatrophic lithotomy.

Adult↗
PubMed1988

Comparison of the Stamey bladder neck suspension procedure with a modified endoscopic suspension for the treatment of stress urinary incontinence.

Endoscopic vesicourethral suspension is an acceptable procedure for the treatment of stress urinary incontinence and is associated with a high success rate and little morbidity. Classical endoscopic vesical neck suspension was performed in 93 patients with cure of incontinence in 89 (95.7%). Cost-effectiveness and simplification were introduced to Stamey's technique. Modifications introduced to the Stamey technique were found to be simpler and to provide cost savings with fewer complications. Eighty-six women were operated on by this method, with 84.9% of success. A total of 133 (74.3%) of the patients had previous surgical procedures to correct incontinence, demonstrating the indication of the endoscopic vesicourethral suspension in case of failures with other techniques.

Adult↗
PubMed1979

Experimental comparative study of surgical and needle biopsies of the testis.

Testis biopsy was performed on 78 rats in order to compare needle and surgical biopsies. The rats were autopsied 7, 15, 30, 60, and 90 days after biopsy. Both techniques provided tissue of equally good quality for histopathological examination and led to irreversible hypospermatogenesis of the biopsied and the contralateral testes.

Animals↗
PubMedDate not supplied

[The BCG as coadjuvant in the treatment of bladder carcinoma].

Thirty one patients with bladder carcinoma of different grades and stages were treated by endoscopic surgery and oral administration of bacillus Calmette-Guerin (BCG). They were randomly separated in two groups: one was treated surgically and the other was treated surgically and with the BCG. According to the ability to develop an immune response to the antigens, patients were divided into three groups. The group who had been treated by endoscopic surgery only had 7 patients with recurrent bladder cancer during a median interval of 30 months. The group treated surgically and with BCG had only one patient with bladder cancer recurrence within a median follow-up period of 30 months. The results obtained with the use of BCG inducing tumor regression seem to indicate a favorable response.

Adjuvants, Immunologic↗