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Biomedical subjects

J M Hay

Publications and source records attributed to J M Hay.

At least 19 recordsLinked to original sources
PubMed2004

Appropriate gastric resection with lymph node dissection for early gastric cancer.

BACKGROUND: The extent of lymphadenectomy (limited vs. extended) and that of gastric resection (partial vs. total) remain controversial issues in the management of early gastric cancer (EGC). A multicentric study was performed to elucidate the appropriate gastric resection with lymph node dissection for early gastric cancer. METHODS: From 1979 to 1988, 332 patients with EGC underwent surgery in 23 French centers. Clinicopathological data, the extent of resection, and the number of lymph nodes retrieved were reviewed retrospectively and screened for prognostic effect. The mean follow-up for the 332 EGC patients was 80 months. RESULTS: Postoperative mortality was correlated to age (odds ratio [OR], 1.1) and extent of gastric resection (OR,10.3). Examination of survival data (excluding postoperative deaths) with univariate analysis and the Cox proportional hazards model showed that the independent factors for excellent prognosis included no lymphatic involvement (P =.005), 10 or more lymph nodes retrieved (P =.003), site of the tumor in the lower third of the stomach (P =.01), and mucosal lesions (P =.04). The extent of resection did not influence long-term survival. CONCLUSIONS: Our results suggest that because of the associated good prognosis, the appropriate surgical treatment for EGC is partial gastrectomy with lymphadenectomy retrieving 10 or more lymph nodes.

Aged↗
PubMed2004

Nuclear mitochondrial pseudogenes as molecular outgroups for phylogenetically isolated taxa: a case study in Sphenodon.

'Living fossil' taxa, by definition, have no close relatives, and therefore no outgroup to provide a root to phylogenetic trees. We identify and use a molecular outgroup in the sole extant lineage of sphenodontid reptiles, which separated from other reptiles 230 million years ago. We isolated and sequenced a partial nuclear copy of the mitochondrial cytochrome b gene. We confirm the copy is indeed not mitochondrial, is older than all extant mitochondrial copies in Sphenodon (tuatara), and is therefore useful as a molecular outgroup. Under phylogenetic analysis, the nuclear copy places the root of the tuatara mitochondrial gene tree between the northern and the southern (Cook Strait) groups of islands of New Zealand that are the last refugia for Sphenodon. This analysis supports a previous mid-point rooted mitochondrial gene tree. The mitochondrial DNA tree conflicts with allozyme analyses which place a Cook Strait population equidistant to all northern and other Cook Strait populations. This population on North Brother Island is the only natural population of extant S. guntheri; thus, we suggest that the current species designations of tuatara require further investigation.

Animals↗
PubMed2003

Treatment and prognosis of early multiple gastric cancer.

AIM: Early gastric cancer (EGC) may have a 5-year survival rate of over 90% following surgery. Early multifocal gastric cancer (EMGC) accounts for between 8.3 and 17% of all EGCs. A multicenter retrospective study is reported of prevalence, characteristics, prognosis and type of resection for EMGC patients. METHOD: 333 patients with EGC were operated on, between January 1979 and December 1988, and followed to June 1996. RESULTS: 33 EGC patients had EMGC. There was no significant difference in clinico-pathological features between EGC and EMGC. 21 cases of EMGC underwent a subtotal gastrectomy and 12 underwent a total gastrectomy. Recurrences after subtotal gastrectomy were, respectively, 10 and 18% for EGC and EMGC patients (p=0.2). The cumulative 5 years specific survival rate for 298 EGC and 34 EMGC were 94 and 90%, respectively (p=0.9). Five-year survival rates after subtotal gastrectomy were 92 and 90% for EGC and EMGC patients, respectively (p=0.8). CONCLUSION: EGC and EMGC had the same clinico-pathological features and prognosis. A careful follow up of the stomach remnant is essential.

Adult↗
PubMed2002

[Value of radiotherapy and chemotherapy in treatment of operable cancers of the esophagus].

Radiotherapy and chemotherapy have been used for more than twenty years as adjuvant treatment of operable cancer of the esophagus. The palliative effect of adjuvant (or neoadjuvant) radio- and/or chemotherapy has been demonstrated in numerous randomized trials. The purpose of this review is to present the principal randomized trials conducted in the treatment of operable cancer of the esophagus. Alone, radiotherapy does not significantly improve survival in patients with operable cancer of the esophagus, irrespective of the pre- or postoperative timing (three trials and one meta-analysis for preoperative, three trials for postoperative, and one trial for pre- and postoperative radiotherapy). Likewise, alone chemotherapy does not significantly improve survival whether given preoperatively (four trials), postoperatively (two trials) or pre- and postoperatively (one trial). Radiochemotherapy combinations appear to provide more hope, but preliminary results are insufficient to draw a clear conclusion. Nevertheless, trial comparing radiotherapy results with chemotherapy, conducted pre- or postoperatively (four trials) appear to demonstrate a significant effect of chemotherapy. The two trials using neoadjuvant therapy have been conducted on patients with adenocarcinomas of the cardia and/or the lower esophagus and have demonstrated very encouraging results for a small number of patients. Finally, the Herslovic trial, while conducted in patients who were initially inoperable, is the only one which has demonstrated superiority of radiochemotherapy over radiotherapy alone. In conclusion, there is still much room for improvement in survival using combined radio- and chemotherapy with different forms (new agents, new associations) and treatment modes (pre- and postoperative or postoperative alone). Despite the wide use of radiotherapy and chemotherapy for cancer of the esophagus, it must be recalled that surgical resection remains the method providing the best chances of survival.

Carcinoma, Squamous Cell↗
PubMed2001

Can laparoscopy reduce hospital stay in the treatment of Crohn's disease?

PURPOSE: The aim of this article was to investigate the safety, outcome, length of stay, and cost of hospital admission in patients with Crohn's disease who underwent laparoscopy compared with open surgery. METHODS: Among 51 consecutive patients with inflammatory bowel disease (1996-2000), 46 with Crohn's disease were included in this nonrandomized prospective study. Of these, 20 patients underwent laparoscopic surgery and 26 underwent open surgery. Data collected included the following information: age, gender, body mass index, diagnosis, duration of disease, preoperative medical treatment, previous abdominal surgery, present indication for surgery, and procedure performed (comparability measures), as well as conversion to open surgery, operating time, time to resolution of ileus, morbidity, duration of hospital stay, and cost of hospital admission (outcome measures). RESULTS: There was no significant difference with respect to comparability measures between the laparoscopic and the open-surgery groups. There was no mortality. There was no intraoperative complication in either group and no conversion in the laparoscopic group. Operating time was significantly longer in the laparoscopic group (302 minutes) vs. the open group (244.7 minutes) (P < 0.05), but this difference disappeared when data were adjusted for the extra time required to perform the laparoscopic hand-sewn anastomoses (288.2 minutes vs. 244.7 minutes). Bowel function returned more quickly in the laparoscopic group vs. the open group in terms of passage of flatus (3.7 vs. 4.7 days) (P < 0.05) and resumption of oral intake (4.2 vs. 6.3 day) (P < 0.01). There were significantly fewer postoperative complications in the laparoscopic group (9.5 percent) vs. the open group (18.5 percent) (P < 0.05); the length of stay was significantly shorter in the laparoscopic group (8.3 days) vs. the open group (13.2 days) (P < 0.01); and the cost of hospital admission was significantly lower in the laparoscopic group ($6106, United States dollars) vs. the open group ($9829, United States dollars) (P < 0.05). CONCLUSION: There is a reduction in the postoperative ileus, length of stay, cost of hospital admission, and postoperative complication rate in the laparoscopic group. Laparoscopic surgery for Crohn's disease is safe, and it is potentially more cost-effective than traditional open surgery.

Adult↗
PubMed2001

Harmonic scalpel in laparoscopic colorectal surgery.

PURPOSE: With advances in laparoscopy, various hemostatic procedures have been advocated with variable results. Using currently available tools, some steps in laparoscopic colorectal surgery still represent technical challenges. Our aim was to investigate the feasibility and reliability of the Harmonic Scalpel in laparoscopic colorectal surgery. METHODS: In this nonrandomized prospective study, 34 consecutive patients (15 males; mean age, 46 (range, 24-80) years) underwent laparoscopic colorectal surgery for benign disease (27 patients) and colorectal cancer (7 patients). Dissection, hemostasis, coagulation, and division of several types of vascular pedicles were performed exclusively with the Harmonic Scalpel. The 10-mm-blade Harmonic Scalpel device was used at full power mode for all purposes through a 10-mm port. Coagulation of vascular pedicles was always achieved with the blades in the flat position. The large pedicles (inferior mesenteric, right and left colic, and ileocolic) were coagulated for 20 seconds in several locations along the length (1 cm) before final division. Smaller vascular pedicles were coagulated for ten seconds before division. When the vein and the artery of major pedicles were divided at their origin, either for malignancy or for technical reasons, they were dissected and coagulated separately. For more limited resection of the mesentery, as in the case of benign disease, vascular pedicles were coagulated together as a single bundle. Operative time, minor or major intraoperative or postoperative hemorrhage, need for conversion to laparotomy, bowel injury, and trocar complications were recorded. All anastomoses were checked on Day 8 by a diatrizoate sodium enema. RESULTS: There was no mortality. Mean operative time was 276 (range, 200-520) minutes. Neither minor nor uncontrollable hemorrhage occurred; no conversion to laparotomy and no vascular or bowel injury were recorded. There was one port-site hematoma. Neither hemoperitoneum, intraperitoneal hematoma, fistula, nor intra-abdominal abscess was observed. CONCLUSION: Coagulation and division of minor as well as major vascular pedicles in laparoscopic colorectal surgery with the Harmonic Scalpel" are technically easy, feasible, and reliable.

Adenocarcinoma↗
PubMed2001

Granulocyte-colony stimulating factor in the prevention of postoperative infectious complications and sub-optimal recovery from operation in patients with colorectal cancer and increased preoperative risk (ASA 3 and 4). Protocol for a controlled clinical trial developed by consensus of an international study group. Part two: design of the study.

GENERAL DESIGN: Presentation of a new type of a study protocol for evaluation of the effectiveness of an immune modifier (rhG-CSF, filgrastim): prevention of postoperative infectious complications and of sub-optimal recovery from operation in patients with colorectal cancer and increased preoperative risk (ASA 3 and 4). This part describes the design of the randomised, placebo controlled, double-blinded, single-centre study performed at an university hospital (n = 40 patients for each group). OBJECTIVE: The trial design includes the following elements for a prototype protocol: * The study population is restricted to patients with colorectal cancer, including a left sided resection and an increased perioperative risk (ASA 3 and 4). * Patients are allocated by random to the control or treatment group. * The double blinding strategy of the trial is assessed by psychometric indices. * An endpoint construct with quality of life (EORTC QLQ-C30) and a recovery index (modified Mc Peek index) are used as primary endpoints. Qualitative analysis of clinical relevance of the endpoints is performed by both patients and doctors. * Statistical analysis uses an area under the curve (AUC) model for improvement of quality of life on leaving hospital and two and six months after operation. A confirmatory statistical model with quality of life as the first primary endpoint in the hierarchic test procedure is used. Expectations of patients and surgeons and the negative affect are analysed by social psychological scales. CONCLUSION: This study design differs from other trials on preoperative prophylaxis and postoperative recovery, and has been developed to try a new concept and avoid previous failures.

Clinical Protocols↗
PubMed2001

Laparoscopic treatment of acute small bowel obstruction: a multicentre retrospective study.

BACKGROUND: Laparoscopic surgery is thought to promote early recovery and quicker return to bowel function. The objective was to evaluate the rate and predictive factors of success, the causes of failure, the morbidity, and mortality during and after hospitalization, as well as to determine whether laparoscopic treatment of acute small bowel obstruction offers the same benefits as for other laparoscopic procedures. METHODS: The records of 308 patients with acute small bowel obstruction treated laparoscopically in 35 centres between 1 October 1988 and 30 September 1996 were retrospectively reviewed. RESULTS: Treatment was implemented completely by laparoscopy ('success' group) in 168 patients (54.6%). Conversion to laparotomy ('failure' group) was required in 140 patients (45.4%; during the same operation in 126 patients and after a median delay of 4 days (range: 1-12 days) in 14 patients). There were significantly more successes in patients with a history of one or two surgical interventions than in those with more than two (56% vs 37%; P < 0.05). There were significantly more successes in patients who had undergone appendectomy only (67/94; 71%) than in patients who (i) had no antecedent surgery (52%; P < 0.05), or (ii) underwent other surgery (33%; P < 0.001). The rate of success was significantly higher (P < 0.001) in patients operated on early (< 24 h) and in patients with bands (54%), than in those with adhesions (31%) or with other causes of obstruction (15%). The median duration of postoperative ileus was significantly shorter in the 'success' group than in the 'failure' group (2 days vs 4 days; P < 0.001). The median duration of postoperative hospital stay was shorter in the 'success' group than in the 'failure' group (4 days vs 10 days; P < 0.001). Fewer immediate wound complications were sustained in the 'success' group than in the 'failure' group (1.2% vs 10.7%; P < 0.001). The total number of immediate or delayed complications and particularly the number of recurrent obstructions after hospitalization as well as the number of deaths did not differ significantly between the two groups. CONCLUSIONS: Successful laparoscopic treatment of small bowel obstruction can be expected in patients who are seen early, and who have had one or two previous interventions (particularly appendectomy, especially if bands are found).

Acute Disease↗
PubMed2001

[Post-traumatic fracture and migration in the pulmonary artery of the catheter of a totally implantable venous access device. Unusual complication].

The case of a 59 year-old patient, who sustained a post-traumatic fracture of the silastic catheter of his totally implantable venous access device that migrated in the right pulmonary artery, is reported. The venous device was placed six months earlier for the treatment of metastatic spread of a primary unknown adenocarcinoma. The venous device was placed on the left side in consideration of a recent right supraclavicular node biopsy. The catheter was introduced through the left internal jugular vein and its peripheral end was positioned subcutaneously across the clavicle to be connected to the port chamber placed in the infraclavicular region. The accidental fracture of the catheter was attributed to a closed trauma occurred during the transport of a refrigerator on the homolateral shoulder. Treatment involved extraction of the migrated fragment through a percutaneous transfemoral angioradiological procedure. A few days later the chamber was removed and a new totally implantable venous access device was placed on the other side.

Catheterization, Central Venous↗
PubMed2000

Laparoscopic sigmoid colectomy with intracorporeal hand-sewn anastomosis.

In recent years, laparoscopy has had a significant impact on colorectal surgery. However, to date, totally laparoscopic procedures have required the use of stapling devices to fashion the anastomosis. Herein we report a case of totally laparoscopic sigmoid colectomy with intracorporeal hand-sewn anastomosis for diverticulitis. We describe the surgical technique, focusing on the advantages of and indications for the laparoscopic hand-sewn anastomosis.

Aged↗
PubMed2000

Lymphatic involvement in early gastric cancer: prevalence and prognosis in France.

BACKGROUND: The prognosis of early gastric cancer (EGC) is considered better than that of invasive gastric carcinoma, with a 5-year survival rate of more than 90% after surgery. The prevalence of lymph node metastasis in EGC ranges from 8% to 20% and is associated with a poor prognosis. HYPOTHESIS: The main prognostic factor of EGC in patients in France is lymphatic involvement. DESIGN, SETTING, AND PATIENTS: From January 1979 to December 1988, 332 patients with EGC were operated on in 23 centers of 2 of the French Associations for Surgical Research. Clinical, pathological, and therapeutic data were reviewed, and the reckoning point was in June 1996. MAIN OUTCOME MEASURES: The cumulative 5- and 7-year specific survival rates of EGC with or without lymphatic involvement. RESULTS: The cumulative 5- and 7-year specific survival rates of 332 patients with EGC (mean follow-up time, 80 months), excluding both operative and unrelated mortality, were 92% and 87.5%, respectively. Thirty-four patients (10.2%) had metastatic lymphatic spread: 13 exclusively in the lymphatic vessels close to the tumor, 17 in at least 1 lymph node, and 4 in both the lymphatic vessels and nodes. The rate of lymph node involvement (regardless of lymphatic vessel involvement) correlated significantly with submucosal invasion (P =. 05) and histologic undifferentiation (P =.03). Lymphatic vessel involvement correlated positively with lymph node involvement (P =. 003). Since 5- and 7-year survival rates of the 13 patients with EGC who had lymphatic vessel involvement without lymph node involvement did not differ significantly from those of patients who had EGC with lymph node involvement (85% and 84% vs 72% and 63%, respectively [P =.42]), all patients with lymph node and/or lymphatic vessel involvement were considered unique. Prognosis was poorest in these patients according to both univariate analysis (94% for 298 without node or vessel involvement vs 78% for 34 with node and/or vessel involvement; P =.006) and multivariate analysis (P =.01). Submucosal invasion was a prognostic factor independent of lymphatic involvement (P =.05). Five- and 7-year survival rates did not differ when the group of 211 patients for whom less than 15 lymph nodes were retrieved were compared with those (n = 51) for whom 15 or more lymph nodes were retrieved (95.5% vs 92% and 95.5% vs 88%, respectively), whether according to univariate (P =.21) or multivariate (P =.31) analysis. CONCLUSIONS: Our results suggest that both lymph node and lymphatic vessel involvement are important prognostic factors in patients with EGC. Lymphadenectomy in EGC is important to identify the high-risk population for whom prognosis is worse. The extent of lymphadenectomy (at least 15 nodes) in these patients, however, does not alter prognosis.

Adult↗
PubMed2000

Prevalence and mechanisms of small intestinal obstruction following laparoscopic abdominal surgery: a retrospective multicenter study. French Association for Surgical Research.

HYPOTHESIS: The prevalence and mechanisms of intestinal obstruction following laparoscopic abdominal surgery have not been studied extensively. DESIGN: Retrospective review of cases of intestinal obstruction after laparoscopic surgery. SETTING: Sixteen surgical units performing laparoscopy in France. PATIENTS: Twenty-four patients with intestinal obstruction. MAIN OUTCOME MEASURES: Prevalence values and descriptive data. RESULTS: The 3 most frequent primary procedures responsible for intestinal obstruction were cholecystectomy (10 cases), transperitoneal hernia repair (5 cases), and appendectomy (4 cases). Prevalences of early postoperative intestinal obstruction after these procedures were 0.11%, 2.5%, and 0.16%, respectively. Intestinal obstruction was due to adhesions or fibrotic bands in 12 cases and to intestinal incarceration in 11 cases. Obstruction was located at the trocar site in 13 cases (9 incarcerations and 4 adhesions), mainly at the umbilicus, and in the operative field in 10 cases (2 incarcerations in a wall defect after transperitoneal inguinal hernia repair, 4 adhesions, and 4 fibrotic bands). The small intestine was involved in 23 of 24 cases; the other was due to cecal volvulus following unrecognized intestinal malrotation. Intestinal obstruction was treated by laparoscopic adhesiolysis in 6 patients and by laparotomy in 18 patients, 6 of whom required small intestine resection. Three postoperative complications but no deaths occurred. CONCLUSION: Intestinal obstruction following laparoscopic abdominal surgery can occur irrespective of the type of operation; the prevalence is as high as (cholecystectomy and appendectomy) or even higher than (transperitoneal hernia repair) that seen in open procedures.

Abdomen↗
PubMed2000

Prevention of deep abdominal complications with omentoplasty on the raw surface after hepatic resection. The French Associations for Surgical Research.

BACKGROUND: Several methods have been suggested to treat the hepatic raw surface after resection. Among these, omentoplasty (OP) has been employed occasionally but there are no clinical studies that clearly demonstrate its usefulness. METHODS: Of 172 randomized patients undergoing hepatic resection between January 1991 and December 1994, 5 were withdrawn for protocol violation, leaving 167 who were randomly allotted to undergo OP (n = 87) on the hepatic raw surface or not (NO; n = 80). This procedure was performed for malignant tumor in 125 cases, benign tumor in 33, and for other causes in 15. Six patients had more than two types of lesions, and 32 patients had associated cirrhosis. Sixty-five major and 102 minor hepatic resections were performed. The main outcome measures studied were the number of patients with deep abdominal complications (DAC; deep bleeding or hematoma, deep infection, with or without pus discharge through drains, bile leakage), as well as repeat operations and postoperative death. Patients were divided into two strata according to the site of the lesion with respect to the diaphragm: (1) in contact (posterosuperior segments II, VII and VIII) or (2) not in contact (anterior segments III, IV, V, and VI). RESULTS: Both groups were comparable as regards patient demographics, intraoperative procedures, intraoperative search for bile leaks and intraoperative transfusion requirements. Fewer patients had DAC in OP (n = 11) than in NO (n = 15) (difference not significant). Ten patients (6%) required repeat operations: 4 in OP without immediate mortality and 6 in NO, 3 followed by death. One further patient in OP required repeat operation after discharge and died. Four patients died in OP and 7 in NO, 1 and 4 of DAC, respectively (not significant). Deep abdominal complications were significantly associated with major hepatic resection (P <0.05) whereas postoperative death was significantly correlated with cirrhosis (P <0.05). CONCLUSIONS: OP on the raw surface after hepatic resection lowers the rate of all complications related to DAC (except biliary leaks) and their severity (repeat operations and death) but not significantly so. OP is not recommended as a routine measure to complete elective hepatic resections.

Abdomen↗
PubMed2000

[Hand-sewn intra-abdominal anastomosis performed via video laparoscopy during colorectal surgery].

STUDY OBJECTIVE: Laparoscopic colectomies have been recently shown to be feasible and safe, with the use of stapling devices to fashion the anastomosis. The aim of this study was to evaluate the feasibility and safety of laparoscopic intra-abdominal hand-sewn anastomosis. PATIENTS AND METHODS: Seven patients (four males and three females, mean age 48 years) were included. There were two ileocolic resections for recurrence of Crohn's disease, two right colectomies (one for Crohn's disease and one for carcinoid tumor of the appendix), two left colectomies for diverticulitis and one segmental colectomy for sigmoid volvulus. There were: four side-to-side anastomoses, two side-to-end anastomoses and one end-to-end anastomosis. Anastomoses were fashioned with interrupted single layer sutures in four cases (two ileo-colic and two colorectal anastomoses) and with single layer running sutures in three cases (two ileo-colic and one colo-colic anastomoses). The specimens were retrieved by means of a plastic bag through a 3 to 5 cm long minilaparotomy in five cases and through the rectum in two cases. RESULTS: Mean additional time to perform hand-sewn intra-corporeal anastomosis was 90 +/- 15 min. There was no operative mortality and no intraoperative complications. Postoperative course was uneventful in six patients. Patients were started on an oral fluid diet on day 2 and discharged on day 5, except for one patient with Crohn's disease who had a severe anastomotic bleeding on postoperative day 2 and who required laparotomy for hemostasis through a service colotomy with a single suture. He was discharged on day 8. CONCLUSION: Intra-abdominal hand-sewn anastomoses are feasible and seem reliable. This represents a new step making laparoscopic procedures even closer to conventional techniques. This technique must be evaluated in larger series.

Abdomen↗
PubMed2000

[Radiotherapy and chemotherapy in the treatment of cancer of the rectum].

The North American consensus conference held in 1990 concluded that the best currently available adjuvant treatment for cancer of the rectum (T3, N1 to N3) was postoperative combination radiotherapy and chemotherapy. In 1994, the consensus conference held in Paris concluded that the benefit observed after preoperative irradiation warranted assessment of the effect of preoperative radiochemotherapy. To decide between these two consensus conclusions, it would be most logical to compare preoperative radiotherapy with postoperative radiochemotherapy in a group of patients with similar echo-endoscopic or imaging findings.

Antimetabolites, Antineoplastic↗