Biomedical subjects

B M Ure

Publications and source records attributed to B M Ure.

At least 19 recordsLinked to original sources

PubMed2006

Impact of prior surgery on the feasibility of laparoscopic surgery for children: a prospective study.

BACKGROUND: This study aimed to determine the impact of prior surgery on the feasibility of laparoscopic surgery for children. METHODS: A prospective study analyzed 471 consecutive children who underwent laparoscopic surgery over a 4-year period. Laparoscopic procedures were classified "easy," "difficult," or "demanding." The end points of the study were conversion rate, intraoperative events, and duration of operation. RESULTS: A total of 89 patients (19%) had undergone previous abdominal surgery. The conversion rate was 18% for the patients with prior surgery versus 9% for those without a prior operation (16/89 vs 35/382; p < 0.05). This difference reflects a significantly higher conversion rate for "easy" procedures among patients with than among those without prior surgery, but not for "difficult" and "demanding" procedures. The type of prior surgery had no significant impact on the mean duration of the operation. Of 71 procedures, 12 (17%) after prior conventional surgery were converted, as compared with 4 (22%) of 18 after prior laparoscopy (p > 0.05). Intraoperative events, mainly attributable to adhesions and lack of overview, occurred in 8% of patients with prior procedures, as compared with 2% without former surgery (7/89 vs 9/382; p < 0.05). Relevant complications were not significantly more frequent after prior surgery. The incidence of conversions decreased with increased time between current and previous surgery. It was 64% for surgeries less than 1 year later, 25% for surgeries 1 to 5 years later, and 5% for surgeries more than 5 years later (7/11 vs 6/24 vs 3/54; p < 0.001). CONCLUSIONS: Prior surgery has a limited impact on the feasibility of laparoscopic surgery for children. The conversion rate and the incidence of intraoperative events, mainly because of adhesions and lack of overviewing, is increased, but not the incidence of relevant complications. The feasibility improves considerably with increased time between surgery and prior surgery. The authors consider laparoscopy to be the first-choice technique after prior surgery.

Abdominal Cavity↗

PubMed2006

Haemodynamic, acid-base and blood volume changes during prolonged low pressure pneumoperitoneum in rabbits.

BACKGROUND: The anaesthetic management of small infants during advanced laparoscopic surgery can be complicated by the major pathophysiological effects of increased intra-abdominal pressure. In this study haemodynamic, acid-base and blood volume changes were investigated during pneumoperitoneum in a small animal model. METHODS: Ten fasted, anaesthetized, mechanically ventilated and multi-catheterized New Zealand rabbits were randomized to carbon dioxide pneumoperitoneum (PP, duration 210 min, pressure 8 mm Hg) or control group. Cardiac index was determined using trans-cardiopulmonary thermodilution and total blood volume was measured by thermal-dye dilution with indocyanine green using a fibreoptic monitor system. RESULTS: In PP cardiac index (CI), central venous oxygen saturation (Scv(O(2))), total blood volume (TBV) and base excess (BE) decreased significantly during the study whereas all variables remained constant in the control group. After release of PP the measured variables did not return to baseline within 30 min [PP, baseline vs study end: CI 108 (22) vs 85 (14) ml kg(-1) min(-1), Scv(O(2)) 81.4 (8.9) vs 56.7 (9.8)%, TBV 318 (69) vs 181 (54) ml, BE -1.9 (2.7) vs -8.7 (1.8) mmol litre(-1); P<0.01]. CONCLUSION: Our animal model suggests that a decrease in CI, metabolic acidosis and hypovolaemia could occur after prolonged low pressure pneumoperitoneum in small infants, which is possibly not detectable by the standard monitor setting. Therefore, the routine use of an extended monitoring including measurement of central venous oxygen saturation and acid-base parameters should be considered during and soon after operation, when pneumoperitoneum will last longer than 2 h.

Acidosis↗

PubMed2006

Carbon dioxide differentially affects the cytokine release of macrophage subpopulations exclusively via alteration of extracellular pH.

BACKGROUND: The improved outcome after endoscopic surgery has been attributed to less surgical trauma. However, the underlying mechanisms are not fully understood, and direct effects of CO2 used for pneumoperitoneum, cellular acidification, and/or the lack of air contamination have been postulated to additionally modulate immune functions during endoscopic surgery. We investigated the effects of CO2 incubation, extracellular acidification, and air contamination on the inflammatory response of two distinct macrophage populations. METHODS: R2 and NR 8383 rat macrophage cell lines were used. Interleukin-6 (IL-6) and nitric oxide after lipopolysaccharide (LPS) stimulation were determined in these sets of experiments: incubation in 100% CO2, 5% CO2, and room air for 2h; incubation at pH 7.4, 6.5, and 5.5 for 2 h in 5% CO2; and incubation in 100% CO2, 5% CO2 and room air in fixed pH 6.3. The extracellular pH was monitored during incubation. We determined the alteration of intracellular pH in cells subjected to extracellular acidification by fluorescence microscopy. RESULTS: Extracellular pH decreased to 6.3 during 100% CO2 incubation. IL-6 release was reduced after CO2 incubation in NR 8383 cells and increased in R2 cells (p < 0.05). It was not altered by air incubation. Decreasing the extracellular pH to 6.5 mimicked the effects of CO2 and a decrease to 5.5 suppressed IL-6 release in both cell lines. In fixed pH at 6.3, CO2 and air incubation had no effect. CO2 and pH had no impact on nitric oxide release and vitality. Intracellular pH decreased with extracellular acidification without significant difference between the two cell lines. CONCLUSIONS: A decrease in extracellular pH during incubation in CO2 differentially affects IL-6 release in macrophage subpopulations. This may explain contradictory results in the literature. Moreover, we demonstrated that air contamination does not affect macrophage cytokine release. The decrease in extracellular pH is the primary underlying mechanism of the alteration of macrophage cytokine release after CO2 incubation, and it appears that the ability to maintain intracellular pH is not determined by the effects of CO2 or extracellular acidification.

Animals↗

PubMed2006

Laparoscopic transperitoneal nephrectomy is feasible in the first year of life and is not affected by kidney size.

PURPOSE: We analyzed the feasibility of laparoscopic nephroureterectomy in children younger than 1 year, with regard to size of impaired kidney. MATERIALS AND METHODS: A total of 40 consecutive children underwent transperitoneal laparoscopic nephrectomy during a 4-year period. Of the patients 19 (48%) were younger than 1 year and were analyzed in detail. Nine of these patients (47.4%) had a multicystic dysplastic kidney, 9 (47.4%) had reflux nephropathy and 1 (5.3%) had obstructive nephropathy. The duration of operation, reasons for conversion, and intraoperative and postoperative complications were prospectively documented. RESULTS: Mean operative time was 133 minutes (range 60 to 240), and did not differ significantly between patients up to age 12 months compared to children 1 year and older (126 vs 148 minutes, NS). Nephroureterectomy was completed laparoscopically in 17 of 19 children (89%) up to age 12 months vs 20 of 21 (95%) 1 year and older (NS). In 1 child younger than 1 year suture dislocation at the renal artery required laparoscopic resuturing. No further complications were seen. In children younger than 1 year the mean operating time was not significantly different for resection of multicystic dysplastic kidney (8 patients, 113 minutes) compared to reflux nephropathy (9, 134 minutes, NS). Mean operating time did not differ significantly for kidney volumes less than 10 cc (8 patients, 119 minutes) compared to kidney volumes greater than 10 cc (9, 129 minutes, NS). CONCLUSIONS: The feasibility of transperitoneal laparoscopic nephroureterectomy in children younger than 1 year is excellent. The duration of operation is not affected by patient age, underlying disease or kidney size.

Adolescent↗

PubMed2006

Laparoscopic transabdominal pyeloplasty in children is feasible irrespective of age.

PURPOSE: We assessed the feasibility of laparoscopic transabdominal dismembered pyeloplasty in 46 infants and children with regard to patient age. MATERIALS AND METHODS: A total of 46 consecutive infants and children (31 male and 15 female) underwent laparoscopic transabdominal dismembered pyeloplasty using a 3 to 4-trocar technique. All patients had confirmed unilateral deterioration of renal function on isotope renography. The 46 patients were divided into 3 age groups--1 to 12 months (group 1, 14 patients), 1 to 7 years (group 2, 15 patients) and 7 to 18 years (group 3, 17 patients). Followup included clinical and ultrasound assessment, and isotope renography at 3 months. RESULTS: Laparoscopic pyeloplasty was feasible in 44 of 46 patients (96%). Mean operative time was 175 minutes (range 120 to 270). The operation was converted due to impracticality of stenting the PUJ in 1 patient, and due to bleeding in 1. Mean operative time in 44 successful laparoscopic procedures was not significantly different among the 3 age groups (171 minutes in group 1, 169 minutes in group 2 and 173 minutes in group 3). Two patients required operative intervention for PUJ leakage, and 1 underwent percutaneous nephrostomy with a further uneventful course. Mean followup was 29 months (range 3 to 86). A total of 44 patients (96%) were asymptomatic and had improved PUJ drainage on isotope renography. Two patients underwent redo pyeloplasty due to recurrent hydronephrosis at 1 month and 2 years. CONCLUSIONS: Laparoscopic transabdominal dismembered pyeloplasty is effective and safe in infants and children. The feasibility is also excellent in patients younger than 1 year. The transabdominal approach revealed good exposition without a disadvantage for the patient.

Abdomen↗

PubMed2006

Minimally invasive repair of pectus excavatum - shifting the paradigm?

PURPOSE: The "minimally invasive repair of pectus excavatum" (MIRPE) has increasingly become the standard operation for the repair of pectus excavatum. The aim of the present study was to report on our first-line postoperative results, including a survey of patients and to elucidate the acceptance of MIRPE. PATIENTS AND METHODS: All MIRPE patients, who were operated on between 2000 and 2004 in our departments, were included in a retrospective study. In 2002, a retrospective questioning of 57 patients was initiated by sending identical questionnaires separately to both the patients and their parents asking for individual reasons for choosing and/or agreeing to MIRPE. RESULTS: Complications were seen in 25 out of 84 MIRPE patients (mean 14 years, range from 5 to 20 years), but most of them were minor. Removal of the bar was necessary in 6 cases, due to bar displacement, secondary haematothorax, pericardial effusion, and local infection, respectively. No major complications occurred in the age group between 9 and 14 years. More than 90 % of the patients and their parents were satisfied or highly satisfied with the MIRPE procedure. CONCLUSION: General and specific complications are similar to other series and they decrease with the surgeon's experience. The most severe problem, occurring in older patients, is how to avoid dislocation of the pectus bar. In the light of the complication rate, the acceptance of MIRPE is still high, especially in adolescents and young adults who had refused operation with the open techniques. In this way, a shifting of a paradigm is taking place.

Adolescent↗

PubMed2006

Laparoscopic nephroureterectomy in children: a prospective study on Ligasure versus Clip/Ligation.

PURPOSE: The present study was performed to compare dissection of the renal hilar vessels in laparoscopic transabdominal nephrectomy in children using the Endo-Ligasure vessel sealing system versus clip/ligation. PATIENTS AND METHODS: In a prospective and comparative study carried out from February 2003 to April 2004, 10 consecutive patients (group 1) underwent laparoscopic transabdominal nephroureterectomy using clips or intracorporeally performed ligations, respectively. From April 2004 to April 2005, 10 consecutive patients (group 2) underwent the same procedure using the Endo-Ligasure vessel sealing system. Indications for surgery were confirmed non-functioning kidneys secondary to benign unilateral renal disease and no prior surgery. The age and underlying disease distribution and the affected side were not significantly different between the two groups. RESULTS: The operating time was significantly lower in the Endo-Ligasure group (group 1: median 167 vs. group 2: 108 min, p < 0.05). Bleeding of the renal artery occurred due to dislocation of a suture ligation, which was treated laparoscopically with an intracorporeal suture ligation. Blood loss was negligible in all patients. All procedures were completed laparoscopically and recovery was uneventful. CONCLUSIONS: Endo-Ligasure is a beneficial tool in laparoscopic transabdominal nephrectomy. It is safe, effective, and reduces operating times compared to clip application and intracorporeal suturing.

Blood Loss, Surgical↗

PubMed2005

Laparoscopic resection of congenital choledochal cyst, choledochojejunostomy, and extraabdominal Roux-en-Y anastomosis.

BACKGROUND: The feasibility of laparoscopic resection of choledochal cyst and hepaticojejunostomy in children is still unclear. This report presents the author's experience with a first series of patients. METHODS: Data from 11 consecutive children (median age 17.5 months, SD 22, range 2 to 70) with choledochal cyst scheduled for laparoscopy were collected prospectively. There were nine type I and 2 type V cysts according to Todani's classification. All except one patient had intermittent jaundice or recurrent pancreatitis. The laparoscopic technique included excision of the cyst. A Roux-en-Y anastomosis was constructed after exteriorization of the small bowel via the infraumbilical trocar incision. After repositioning of the bowel an end-to-side hepaticojejunostomy was carried out laparoscopically. RESULTS: The procedures were carried out in nine children without intraoperative events and a median duration of 289 min (SD 62). In two patients, the operation was converted after 60 and 90 min due to a lack of overview at the dorsal margin with problems in separation of the portal vein. Oral food intake was started within 2 days and tolerated well in all except one patient, in whom biliar fluid from the drain led to laparoscopic reevaluation on day 1. A small leak was resutured and the patient was discharged on day 5. In one patient, recurrent cholangitis and a dilated Roux-en-Y loop led to correction of some kinking of the loop via laparotomy after 3 months. All other patients are well with bile-stained stools after a mean follow-up of 13 months. CONCLUSIONS: Laparoscopic resection of congenital choledochal cyst and choledochojejunostomy in children is feasible. We feel that there is a considerable learning curve with the technique. Future studies will have to prove the feasibility of laparoscopic Roux-en-Y bowel anastomosis without the need for bowel exteriorization.

Anastomosis, Roux-en-Y↗

PubMed2005

Mini-laparotomy and full laparotomy, but not laparoscopy, alter hepatic macrophage populations in a rat model.

BACKGROUND: Immune function is better preserved by laparoscopic versus conventional surgery. Numerous mediators of the systemic trauma response are synthesized and/or regulated by the liver. However, it has been stated that the advantages of laparoscopic surgery are no more obvious when conventional operations are performed via mini-laparotomy. We set out to compare the impact of laparoscopy and mini- and full laparotomy on the hepatic macrophage populations. METHODS: Male Lewis rats were subjected to anesthesia alone (control), mini-laparotomy (1 cm), full laparotomy (7 cm), or laparoscopy for 60 min. Endpoints were the total protein in the peritoneal lavage fluid, hepatic ED-1 cells (recruited monocytes), hepatic ED-2 cells (Kupffer cells), the expression of OX-6 in the liver, and C-reactive protein (CRP) in plasma. RESULTS: Protein in the peritoneal lavage fluid increased significantly after all interventions. Full laparotomy was accompanied by an enhancement in ED-1-positive monocytes in the liver parenchyma compared to all other groups (p < 0.001). Mini- and full laparotomy led to an increase in ED-2-positive Kupffer cells (p < 0.001). Laparoscopy did not affect the number of monocytes/macrophages. There was no significant alteration of OX-6 expression in either group. No change in the cellular composition in the periportal fields was observed. The CRP plasma levels did not significantly differ between groups. CONCLUSIONS: Laparoscopy completely prevents hepatic macrophage populations from expansion and normal cell disposition is preserved. Laparotomy, irrespective of incision size, increases the number of Kupffer cells. Moreover, full laparotomy, but not mini-laparotomy or laparoscopy, causes an increase in hepatic monocyte recruitment. The regulating pathways after surgery differ from other immunologic challenges, such as sepsis, in which immunocompetent cells accumulate and are stimulated in the periportal fields.

Animals↗

PubMed2005

Laparoscopic partial external biliary diversion procedure in progressive familial intrahepatic cholestasis: a new approach.

BACKGROUND: Progressive familial intrahepatic cholestasis results in fibrosis, cirrhosis, and liver insufficiency if untreated. Medical therapy often fails and partial external biliary diversion has been recommended to prevent early liver transplantation. We present a new technique of performing a laparoscopic partial external biliary diversion and report our experience in a first series of infants. METHODS: From October to November 2004, four consecutive patients with progressive familial intrahepatic cholestasis underwent the laparoscopic partial biliary diversion procedure. A three-trocar technique was used. A proximal jejunal conduit was constructed after exteriorization of the small bowel via the infraumbilical trocar incision. After repositioning of the bowel, an isoperistaltic cholecystojejunostomy was carried out laparoscopically. The distal jejunal conduit was placed as a stoma at the right abdominal trocar site. RESULTS: There were no intraoperative events. The mean duration of the operation was 156.5 min. The postoperative course was uneventful in all patients with full enteral feedings on day 2. The laboratory and clinical signs of cholestasis were reduced up to a mean follow-up of 2 months (range, 1.5-2.5). CONCLUSION: The laparoscopic partial biliary diversion procedure is feasible with all the benefits of minimally invasive surgery. Long-term results remain to be evaluated.

Bile Ducts↗

PubMed2005

Anuria during pneumoperitoneum in infants and children: a prospective study.

INTRODUCTION: Transient oliguria during laparoscopic surgery is a known phenomenon. Currently, no data on the impact of pneumoperitoneum on renal function in children are available. PATIENTS AND METHODS: Thirty children with normal kidney function, who underwent laparoscopic surgery, were included in a prospective study. A transurethral catheter was placed to measure urine output during and 6 hours after operation. Renal blood flow (resistive index) was evaluated by Doppler ultrasound of a segmental renal artery before surgery, every 15 minutes during laparoscopy, and after 24 hours. Blood and urine samples were studied before and 24 hours after surgery. Hemodynamic parameters were monitored continuously during standardized anesthesia, including a standardized intravenous infusion regimen. RESULTS: Urine output decreased within 45 minutes of pneumoperitoneum in all patients. Of 8 children younger than 1 year, 7 (88%) developed anuria vs 3 of 22 (14%) children aged 1 to 15 years (P < .001). Nine children 1 year and older (32%) developed oliguria. There was a significant recovering in the mean urine output until 5 to 6 hours after pneumoperitoneum in both age groups. No significant alterations of the renal blood flow (resistive index) and the serum and urine levels of cystatin C, creatinine, and urea nitrogen were evident until 24 hours postoperatively. The volume of infusion during pneumoperitoneum did not correlate with urine output. CONCLUSION: Pneumoperitoneum leads to anuria in most children younger than 1 year and to oliguria in about one third of older children. This is a completely reversible phenomenon. Urine output should not be taken into consideration for calculating intravenous fluid administration during pneumoperitoneum in children.

Age Factors↗

PubMed2005

Thoracoscopic surgery in infants and children.

Numerous investigators have shown that video-assisted thoracoscopic surgery (VATS) can be safely used for specific conditions of newborns, infants, and children. The technique has been postulated to be associated with a lower morbidity, shorter hospital stay, lower costs, and clinical results similar to those achieved by open surgery. The present article reviews the state of the art of VATS for thoracic conditions in children. Most authors focus on the feasibility of single procedures, and only a small number of reports deals with the feasibility in series with multiple types of procedures and larger numbers of patients. Therefore, systematic research on the advantages and limits of VATS in children remains mandatory.

Adolescent↗

PubMed2005

Fundoplication in paediatric surgery: a survey in 40 German institutions.

BACKGROUND: There is no generally accepted standard surgical approach to gastrooesophageal reflux disease (GERD) at present. However, laparoscopic fundoplication has been advocated to be the procedure of choice for gastrooesophageal reflux disease in children. We aimed to assess the standards of the diagnostic workup and operative techniques in paediatric surgical institutions in Germany. MATERIAL AND METHODS: A questionnaire including 14 items was sent to all 71 departments of paediatric surgery in Germany. Forty (56 %) took part in the survey. Concepts of routine diagnostic workup, operative techniques, number of procedures, and conversions were assessed. RESULTS: The average annual frequency of fundoplications was less than 20 in 36 units (90 %). Experience with laparoscopic fundoplication was present in 24 institutions (60 %). In 19 out of these (79 %) fewer than 50 laparoscopic fundoplications had been performed altogether up to the time of the survey. Out of 584 fundoplications performed in the year 2002, 184 (32 %) had been done laparoscopically. The ratio of conventional versus laparoscopic fundoplication was 170/130 (57/43 %) in academic, and 226/54 (81/19 %) in non-academic departments. The preferred technique of fundoplication, irrespective of the approach, was the Nissen wrap in 28 (70 %) of the departments. The number of paediatric surgeons performing laparoscopic fundoplication was 1 - 2 in 16 institutions (67 %), 3 or 4 in 6 (25 %), and 5 in 2 (8 %) departments. The conversion rate was reported to be less than 5 % in 15 departments (63 %), and 5 - 10 % in 3 (13 %). CONCLUSION: The laparoscopic approach for surgical repair of GERD in children is not yet generally accepted in Germany. In most departments, training remains problematic due to low numbers of procedures. However, the feasibility of laparoscopic fundoplication in Germany is excellent, with a low rate of conversions.

Child↗

PubMed2004

Laparoscopic fundoplication in neurologically impaired children with percutaneous endoscopic gastrostomy.

TOPIC: Laparoscopic fundoplication is the preferred surgical procedure for children with gastro-oesophageal reflux. Little data exist on the feasibility of laparoscopic fundoplication after placement of a percutaneous endoscopic gastrostomy (PEG). PATIENTS AND METHODS: Thirty-nine children aged 4 months to 18 years (median 3.6 years) presented for an antireflux procedure between November 2000 and July 2003. The surgical technique used was the Thal (270 degrees ) fundoplication. Clinical data, technical aspects of the operation, and the postoperative course were collected prospectively. RESULTS: Twenty-two children (56 %), all of them neurologically impaired, already had a PEG in place due to feeding problems irrespective of gastro-oesophageal reflux symptoms. In all cases, laparoscopic fundoplication was performed immediately after gastroscopic removal of the PEG tube. In two cases, conversion to an open procedure became necessary, due to reasons unrelated to the PEG. In one case conversion was necessary because of adhesions of an intrathoracic stomach and in the other case because of circulatory problems due to congenital cardiomyopathy. In one patient, the gastrostomy was moved at the end of the procedure because it was too close to the antrum. In two further cases, the gastrostomy detached during fundoplication. In this case, the gastrostomy catheter was replaced and secured laparoscopically with a purse-string suture. All other cases were without any complications and a balloon tube or a button was placed into the existing gastrostomy channel at the end of surgery. CONCLUSION: No adverse effects are associated with PEG placement prior to a consecutive laparoscopic antireflux procedure. Possible detachment of the pre-existing gastrostomy must be excluded at the end of the procedure.

Adolescent↗

PubMed2004

Postcholecystectomy syndrome with special regard to children--a review.

The incidence of abdominal symptoms after cholecystectomy in adults is high. Up to one third of the patients consult a doctor because of abdominal complaints within 1 year after the operation. In addition, a higher incidence of colon carcinoma after cholecystectomy has been reported in female patients. This article reviews the known facts on the "postcholecystectomy syndrome". However, little is known about postcholecystectomy symptoms in children. Reports on cholecystectomy in children deal rather with feasibility than long-term outcome. Therapeutic concepts for children with symptomatic gallstone disease should consider the differences in the etiology of gallstone formation between children and adults. Therefore, we recommend a specific concept, including laparoscopic cholecystotomy, for children with temporary disorders causing gallstones, and laparoscopic cholecystectomy for all other patients. The impact of these procedures on postcholecystectomy symptoms in children and the impact of cholecystectomy during childhood on the incidence of right-sided colonic carcinoma remains to be determined.

Child↗

PubMed2003

What's new in biliary atresia?

The main problem with biliary atresia (BA) is three-fold. Early diagnosis and timely therapy is mandatory in this rare and life-threatening disease. In as much as the aetiology of BA is unknown, all therapeutic attempts are still symptomatically orientated and finally, at the end-stage of the disease, the majority of the patients need organ replacement. Due to promising interdisciplinary cooperation and improved outcomes after liver transplantation, the overall survival rate of patients with BA increased remarkably during the last decades. Additionally, every effort was made in clinical and basic research to obtain a better understanding of the disease and its clinical course. Nevertheless, the nature of biliary atresia still remains unclear and therapeutic options are unsatisfactory. Numerous papers about BA have appeared, reflecting clinical and scientific activity. Considering recent publications and prospective activities, in the following we will summarise what is new in biliary atresia.

Algorithms↗

PubMed2002

Peritoneal, systemic, and distant organ inflammatory responses are reduced by a laparoscopic approach and carbon dioxide versus air.

BACKGROUND: Advantages of laparoscopic surgery have, among other factors, been attributed to a shorter length of abdominal incision and the use of CO2 versus air. An analysis of these factors taking pressure-induced alterations into account is lacking. The objective of the study was to determine the impact of laparoscopy and laparotomy with exposure to CO2 and room air under a similar pressure on local, systemic, and distant organ immune responses. METHODS: Twenty piglets were randomized into four groups: CO2 laparoscopy, air laparoscopy, CO2 laparotomy, and air laparotomy. Laparotomy was performed in a sterile balloon pressurized similar to laparoscopy. Peritoneal interleukin-1, interleukin-6, tumor necrosis factor-a, and counts of polymorphnuclear cells (PMNs), and macrophages (MFs) were determined in abdominal lavage fluids at 0, 2, and 48 h. Macrophages were assessed for reactive oxygen species (ROS) production. Systemic responses were gauged by white blood cell count (WBC) and cytokines. Alveolar lavage was performed at 48 h to determine cytokine levels, cell counts, and MF ROS production. Blood, lavage fluids, and mesenteric lymph nodes were tested for bacterial translocation. RESULTS: Regarding the peritoneal response, laparotomy versus laparoscopy when performed with CO2 significantly increased PMN and decreased the percentage of macrophages (%MF) up to 48 h. There was a significant increase in interleukin-6, and there was a fourfold increase in MF ROS production. Similar differences between the procedures were found with exposure to air. The use of air versus CO2 in laparoscopy, but not in laparotomy, resulted in an increase of peritoneal PMN and a decrease of the %MF up to 48 h. Air increased the local interleukin-6 release in both procedures and increased MF ROS production fourfold. Regarding the systemic response, laparotomy produced a significant increase in WBC, which was significantly more pronounced with exposure to air. No alteration of other systemic cytokines was seen. Regarding the pulmonary response, the number of MFs and MF ROS production were significantly increased after air versus CO2 laparoscopy. There were no such differences between the laparotomy groups. Regarding bacterial translocation, no bacteria were cultured from peritoneal fluids, lymph nodes, or blood. CONCLUSIONS: Inflammatory responses were reduced by a laparoscopic approach and by exposure to CO2 versus air. Peritoneal responses were affected to a larger degree than systemic parameters. Laparotomy overruled the effects of CO2 on chemotaxis and distant organ injury but not on peritoneal cytokine release.

Air↗

PubMed2002

What's new in minimally invasive paediatric surgery?

There has been substantial progress in minimally invasive techniques in children in recent years. Numerous investigators have shown that laparoscopic and thoracoscopic paediatric surgery can be performed safely. It has been postulated that minimally invasive paediatric surgery is associated with low morbidity, a shorter hospital stay, lower costs and clinical results similar to those achieved by open surgery. The present article reviews information from the past 2 years on the pathophysiological effects, feasibility, standards, new techniques, the importance of the method in malignant diseases and robotics. However, most of these reports still focus on safety and feasibility. It would be preferable if the paediatric surgical society itself would discriminate between useful and useless or harmful techniques. Therefore, further systematic research on the advantages and limits of minimally invasive surgery in children is mandatory.

Child↗