Search PubMed⌕ Search

Biomedical subjects

J S Valla

Publications and source records attributed to J S Valla.

At least 37 records · Page 2Linked to original sources
PubMed1998

Laparoscopic renal surgery via a retroperitoneal approach in children.

PURPOSE: Laparoscopic procedures are still not widely performed by pediatric urologists due to operative time and costs as well as the lack of indications and, thus, the lack of sufficient surgeon experience. We report our experience with the retroperitoneal approach using special inexpensive methods for various indications in children. MATERIALS AND METHODS: From 1994 to 1997 we performed 42 retroperitoneal laparoscopic procedures in 41 children with a mean age of 4 years, including 31 nephrectomies, 8 partial nephrectomies, 2 renal cystectomies and 1 pyelolithotomy. A total of 13 patients were younger than 1 year. Followup ranged from 6 months to 3 years. RESULTS: Mean operative time was 104 minutes (range 35 to 150) for nephrectomy, 153 (range 90 to 210) for upper pole nephroureterectomy, 135 for pyelolithotomy and 60 for renal cystectomy. Average postoperative stay was 2 days. Conversion was required in 2 cases of partial nephrectomy due to unidentified polar vessels, including 1 involving duodenal perforation. CONCLUSIONS: The indications for retroperitoneal laparoscopy are expanding with the experience of the surgical team. The retroperitoneal approach provides a technique comparable to that of conventional renal surgery.

Adolescent↗
PubMed1998

Is diffuse xanthogranulomatous pyelonephritis a contraindication to retroperitoneoscopic nephroureterectomy? A case report.

Diffuse xanthogranulomatous pyelonephritis (XGP) is a rare form of chronic infection of the child's kidney. The clinical presentation is nonspecific, and investigation often reveals a nonfunctional kidney. Preoperative diagnosis is very difficult even with ultrasonography and computed tomography. Total nephrectomy is the treatment of choice, but it is considered very difficult and is usually contraindicated for laparoscopic or retroperitoneoscopic techniques. Reported here is a case of retroperitoneal laparoscopic nephroureterectomy for XGP.

Adolescent↗
PubMed1997

[Adnexal torsion in children: plea for early laparoscopic diagnosis and treatment].

BACKGROUND: Experience with adnexa torsion in children, a rare but potentially severe pathology, is still disappointing despite constant radiological progress. PATIENTS AND METHODS: The files of 19 patients with adnexial torsion treated between 1985 and 1995 were retrospectively reviewed and compared to those reported. RESULTS: Eight adnexectomies, six oophorectomies, five detorsions with cystectomy and one salpingectomy were performed. There were only five salvaged adnexa in this series. Three tumors were found; all other cases, except three, were torsions induced by voluminous functional cysts. DISCUSSION AND CONCLUSION: Clinical context (sudden right pelvic pain without fever) seems important to note. Sonographic examination is first necessary, but its results are not accurate enough to confirm the torsion. Endo-rectal ultrasonography should become the best diagnostic method in cases of complicated ovaries. In order to increase the percentage of salvaged adnexa, the authors recommend a laparoscopic approach in emergency when clinical examination was doubtful.

Adnexal Diseases↗
PubMed1997

Laparoscopic approach to primary infarction of the greater omentum.

We describe three new cases of primary segmental infarction of the greater omentum in children. Distinguishing the problem from appendicitis was difficult. Ultrasonography and computed tomography may be useful in confirming the preoperative diagnosis. We discuss management and laparoscopic approach of this rare cause of recurrent abdominal pain in children.

Abdominal Pain↗
PubMed1996

[Lethargic form of acute intestinal intussusception in an infant].

BACKGROUND: Intussusception encephalopathy, a misleading form in which neurological symptoms are obvious, is classic but rarely described. CASE REPORT: A 21 month-old infant was admitted because he had suffered from fluctuating consciousness and apathy for a few hours. Vomiting occurred soon afterwards. Search for dehydration, meningitis, encephalitis, poisoning... was negative; the abdomen was tender leading to ultrasonography that showed a sausage-shaped tumor. The ileocolic intussusception was successfully reduced with a gas enema. CONCLUSION: A striking degree of lethargy associated with vomiting may overshadow to a considerable extent the classical intestinal manifestations. A possible endogenous opioid poisoning by massive secretion of endorphins during pain's paroxysm is one of the hypotheses explaining this type of presentation.

Acute Disease↗
PubMed1996

Laparoscopic versus lumboscopic nephrectomy.

OBJECTIVES: The aim of this study is to compare the initial experience at two different urologic centers of the 20 first laparoscopic nephrectomies performed either by transperitoneal laparoscopy (10 cases) in one center or by retroperitoneal laparoscopy (lumboscopy, 10 cases) in the other center. METHODS: 5 males and 15 females with a mean age of 36 years (range 3-74) were operated on the right side in 8 cases and on the left side in 12 cases. Nephrectomies were indicated in 18 cases for benign renal disease, and in 2 cases for ureteric tumor (1 patient in each group). The techniques of these two approaches are described. RESULTS: The mean operating time was shorter with lumboscopy (173 min) than with laparoscopy (210 min), probably due to the direct approach to the renal compartment without intraperitoneal dissection with lumboscopy. There were no severe intraoperative or postoperative complications, but one hematoma of the renal area in the laparoscopic group. The mean postoperative hospital stay was identical following lumboscopy and laparoscopy (4.3 and 4.2 days, respectively). CONCLUSION: These two approaches can be used to perform nephrectomy. In this initial experience, the results appear to be equivalent in terms of morbidity and postoperative hospital stay, but the operating time appears to be shorter with lumboscopy. Larger studies comparing respective nephrectomy conversion rates would provide other arguments in favor of one or other of these techniques.

Adolescent↗
PubMed1996

Retroperitoneal laparoscopic nephrectomy in children. Preliminary report of 18 cases.

Laparoscopic nephrectomy is a new procedure which remains to be evaluated in adults and children. This technique enables the reduction of parietal complications and sequelae. The majority of indications, e.g. renal dysplasia, destroyed kidneys due to obstructive or refluxing uropathy, are suitable for laparoscopic nephrectomy. Contraindications are Wilm's tumor and trauma which represent only 20% of nephrectomies in our experience. As in open surgery, a retroperitoneal approach seems more logical and better adapted than a transperitoneal approach to perform nephroureterectomy for benign disease. From August 1993 to December 1995, we attempted 18 retroperitoneal laparoscopic nephrectomies in children aged from 3 months to 14 years. The patient is placed in a lateral position, and after creation of a retropneumoperitoneum under direct vision control without balloon dissection, three or four ports are needed, renal vessels are dissected, then clipped or coagulated if small. Destroyed kidneys are generally of small size, so they can be extracted via a 10- or 12-mm cannula site without morcellation. Operative time is 35-210 min (median 106 min). There were no major complications and only one conversion. In conclusion, retroperitoneal laparoscopic nephrectomy in children is a feasible and safe procedure in well-trained hands.

Adolescent↗
PubMed1996

Retroperitoneal laparoscopic nephrectomy in children: preliminary report of six cases.

Laparoscopic nephrectomy is a new procedure that must be evaluated in adults and children. This technique allows a reduction in complications and sequelae. The majority of indications, such as renal dysplasia and destroyed kidneys due to obstructive or refluxing uropathy, are suitable for laparoscopic nephrectomy. Contraindications are Wilms' tumor and trauma, which represent only 20 percent of nephrectomies in our experience. As in open surgery, to perform nephroureterectomy for benign disease, a retroperitoneal approach seems more logical than transperitoneal approach, which is the usual approach for laparoscopic surgeons. We have attempted six retroperitoneal laparoscopic nephrectomies in children from 3 months to 14 years old. The patient is positioned in a lateral position after creation of a retropneumoperitoneum under visual control; three or four ports are needed and renal vessels are dissected then clipped, or coagulated if small. Destroyed kidneys are generally of small size, so they can be extracted via a 10- or 12-mm cannula site without morcellation. Operative time ranges from 35 to 210 mm (median 120 mm). We have had no complications or conversions. Retroperitoneal laparoscopic nephrectomy in children is a feasible and safe procedure in well-trained hands.

Adolescent↗
PubMed1995

Primary bronchogenic squamous cell carcinoma in children: report of a case and review of the literature.

The authors report a case of primary bronchogenic squamous cell carcinoma (SCC) revealed by recurrent pneumonia in an 11-year-old boy. Four years after complete surgical resection followed by external radiotherapy, the patient is currently relapse- and metastasis-free. To our knowledge, this is only the sixth pediatric case of primary bronchogenic SCC reported to date.

Carcinoma, Squamous Cell↗
PubMed1994

Laparoscopic appendectomy in children: report of 1,379 cases.

The authors present a retrospective analysis of 1,379 pediatric laparoscopic appendectomies. The patients' average age was 10 years (range, 2 to 16 years). On gross examination, 90% of the appendixes appeared inflamed; on microscopic examination, 93% had evidence of acute appendicitis. The incidence of appendiceal peritonitis was 16%. Nonappendiceal lesions were identified in 10% of patients. The incidence of minor intraoperative events was 2.1%, and the postoperative complication rate was 1.5%; 0.7% of patients required a subsequent laparotomy or additional laparoscopic procedure. There were no deaths. The children were discharged after a 2-day (average) hospitalization and returned to unrestricted activities 1 week after surgery. The advantages of laparoscopic appendectomy are its easy and rapid localization of the appendix, the ability to explore the entire abdominal cavity, the ability to lavage completely the contaminated peritoneal cavity, and a reduction in the incidence of intraperitoneal abscesses and postoperative adhesions. Laparoscopic appendectomy offers reduced parietal scarring, a shorter hospital stay, and an earlier return to normal activities, even in cases of complicated acute appendicitis. Our experience confirms that laparoscopic appendectomy is safe and effective in children.

Adolescent↗
PubMed1991

Single-stage correction of posterior hypospadias (178 cases). Comparison of three techniques: free skin graft, free bladder mucosal graft, transverse pedicle preputial graft.

Three techniques have been developed for single-stage repair of posterior hypospadias: free skin grafts, free bladder mucosal grafts, and pedicle preputial grafts. This multicenter retrospective study of 178 children who underwent surgery for posterior hypospadias was designed to compare the results achieved with these procedures. Free skin grafts (15 cases) resulted in the most frequent complications, and in particular the most severe strictures; in our opinion this technique should be abandoned. Pedicle preputial grafts (133 cases) gave the greatest number of successes from the outset, and should be preferred whenever the dimensions of the prepuce are sufficient for urethroplasty. Results with bladder mucosal grafts (30 cases) were not as good as with preputial grafts, but this technique remains the only solution when the meatus is in a very posterior position, and for children who have already undergone multiple operations.

Adolescent↗
PubMed1991

Laparoscopic appendectomy in children: report of 465 cases.

The authors present a retrospective analysis of 465 pediatric laparoscopic appendectomies. The ages of these patients ranged from 3 to 16 years, with a mean age of 10 years. The diagnosis of acute appendicitis was based on one or more of the following: the initial or repeated physical examination, abdominal radiographs, leukocyte blood count, and ultrasonography. On gross examination, 90% of appendices appeared inflamed, while on microscopic examination, 93% showed evidence of acute inflammation. There was a 3.6% incidence of minor intraoperative incidents and a 3.0% postoperative complication rate with 1.3% of patients requiring a subsequent laparotomy or repeat laparoscopic procedure. There were no deaths. The advantages of laparoscopic appendectomy include easy and rapid localization of the appendix, regardless of its location, the ability to explore the entire abdominal cavity through the same laparoscopic portals used for appendix removal, the ability to lavage completely the contaminated peritoneal cavity, a reduction in the incidence of intraperitoneal abscesses, and a probable reduction in postoperative adhesions. In addition, laparoscopic appendectomy is associated with less cutaneous scarring and a more rapid return of intestinal function and normal activities. In our experience, these results are better than those obtained with classical surgery.

Acute Disease↗
PubMed1989

[Experimental study of submucous vesical injections in rats. Teflon versus silicone].

Correction of vesicoureteric reflux by endoscopic subureteric injection of polytef paste is an expending procedure. But polytef past is thick, hard to inject and can migrate at distant sites of injection. We have tried a silicone paste on experimental studie observes tissue reaction at the site of injection (bladder) and in pelvic nodes, kidneys, liver, lungs, brain. 22 rats were injected: 8 with polytef paste, 14 with silicone paste. The study demonstrated that polytef paste sub mucosal injection is followed by migration nodes and local granulomatous reaction. The silicone paste is easier to inject; none particules of silicone were found in nodes nor in others visceria; granulomatous reaction and fibrous capsule around foreign body were smaller.

Administration, Intravesical↗
PubMed1989

[Closed thorax esophagectomy in caustic stenosis of the esophagus].

The technique of oesophagectomy without thoracotomy using a stripper for oesophageal eversion has been applied to 6 cases of caustic stenosis of oesophagus in infants. This technic has been realized 6 to 18 months after the initial lesion in 5 cases, 13 years in a case. There is neither morbidity nor mortality. This procedure seems well adapted to pediatric indications of oesophagectomy.

Burns, Chemical↗