Jeffrey Lukish

A Comparison of the Effect of Growth Factors on Intestinal Function and Structure in Short Bowel Syndrome

BACKGROUND/PURPOSE Epidermal growth factor (EGF) and Insulin like growth factor-1 (IGF-1) increase substrate absorption beyond the normal adaptive response after massive small bowel resection in the rat. However, the mechanism for this response is unknown. This study was designed to evaluate the ultrastructural features of the rat small intestine epithelium after exposure to EGF and IGF-1 and correlate any changes with a possible hypothesis regarding the mechanism for the increased absorption. METHODS Male Sprague-Dawley rats underwent an 80% small bowel resection and jejunostomy tube placement. Seven days later an osmotic pump placed subcutaneously and containing the test substance was connected to the jejunostomy tube. The rats were assigned to one of three groups: group 1 received normal saline (control, n = 5); group 2 received EGF at 150 microg/kg/d (n = 5); and group 3 received IGF-1 at 20 mg/kg/d (n = 5). After a 14-day infusion, a portion of mid-small bowel was resected for light and electron microscopic evaluation from each of the animals. The following features were compared between the groups: villous length, crypt length, villous-crypt ratio, villi per millimeter mucosa, goblet cell distribution, eosinophilic infiltrates, number and distribution of organelles, length of microvilli, and completeness of microvillous surface. RESULTS Ultrastructurally, the bowel epithelium was well preserved in all animals. There were no objective ultrastructural differences between the controls and growth factor-exposed animals. The mean villous-crypt ratio, mean number of villi per millimeter of mucosa (cross section), and mean microvillous height were not significantly different among the groups. However, there was a subjective increase in the number of lysosomes in the enterocytes exposed to EGF and IGF-1. CONCLUSIONS Administration of EGF and IGF-1 after massive small bowel resection does not appear to significantly alter the small intestine epithelial ultrastructure when compared with the control group. The increase in lysosomes in some of the enterocytes of the animals exposed to growth factors may be important because this finding was not seen in any of the control electron photomicrographs. Studies to evaluate enterocyte gene and protein expression are necessary to determine the mechanism of EGF and IGF-1 enhancement of substrate absorption beyond intestinal adaptation.

Laser epilation is a safe and effective therapy for teenagers with pilonidal disease.

UNLABELLED Pilonidal disease (PD) is a frustrating condition because of a recurrence rate as high as 30%. Hair insertion is the essential cause of the disease. Therefore, hair removal with shaving is a part of many postoperative regimens. These methods are resource intensive and adversely impact the life-style of both patient and family. Therefore, we investigated the use of laser epilation (LE) of the intergluteal hair in adolescents with PD as a method of permanent hair removal. METHODS A retrospective review of all patients with PD who underwent LE from 2003 to 2006 at the National Naval Medical Center, Bethesda, Md, and Walter Reed Army Medical Center, Washington, DC, was performed. Laser epilation of the intergluteal hair was carried out with a 1064 nm Nd:YAG laser (Coolglide Vantage, Altus/Cutera, Brisbane, Calif) at a standard fluence (joule/square centimeter), pulse duration, and repetition rate based on skin phototype. The patients were observed for hair regrowth and recurrence. RESULTS Twenty-eight teenagers (17 males, 11 females; mean age, 17.2 +/- 1.4 years) underwent LE. Eight patients presented with abscess and were managed by incision and drainage followed by excision and open wound management, 17 patients presented with a cyst or sinus and underwent excision and primary closure, and 3 patients with asymptomatic sinus were managed nonoperatively. Laser epilation was performed after complete wound healing or immediately in those patients with asymptomatic sinus disease. Laser epilation was well tolerated and without complication in all patients. Intergluteal hair was completely removed in all patients. Patients required an average of 5 +/- 2 LE therapy sessions for hair removal. All patients underwent at least 3 LE sessions (range, 3 to 7 sessions) at 4-week intervals. One female developed a recurrence. The mean follow-up for the group was 24.2 +/- 9.9 months. CONCLUSIONS Laser epilation is a safe method to remove intergluteal hair in teenagers with PD. This technique is an effective adjunctive therapy for the treatment of PD that may reduce recurrence.

Age at presentation of common pediatric surgical conditions: Reexamining dogma

PURPOSE The commonly cited ages at presentation of many pediatric conditions have been based largely on single center or outdated epidemiologic evidence. Thus, we sought to examine the ages at presentation of common pediatric surgical conditions using cases from large national databases. METHODS A retrospective analysis was performed on Healthcare Cost and Utilization Project databases from 1988 to 2009. Pediatric discharges were selected using matched ICD9 diagnosis and procedure codes for malrotation, intussusception, hypertrophic pyloric stenosis (HPS), incarcerated inguinal hernia (IH), and Hirschsprung disease (HD). Descriptive statistics were computed. RESULTS A total of 63,750 discharges were identified, comprising 2744 cases of malrotation, 5831 of intussusception, 36,499 of HPS, 8564 of IH, and 10,112 of HD. About 58.2% of malrotation cases presented before age 1. Moreover, 92.8% of HPS presented between 3 and 10weeks. For intussusception, 50.3% and 91.4% presented prior to ages 1 and 4years, respectively. Also, 55.8% of IHD cases presented before their first birthday. For HD, 6.5% of cases presented within the neonatal period and 45.9% prior to age 1year. CONCLUSION Our findings support generally cited presenting ages for HPS and intussusception. However, the ages at presentation for HD, malrotation, and IH differ from commonly cited texts.

Nonoperative closure of persistent gastrocutaneous fistulas in children with 2-octylcyanoacrylate.

UNLABELLED A persistent gastrocutaneous fistula (pGCF) is an all-too-common complication following removal of a gastrostomy tube (GT) in a child and is associated with significant morbidity. The most common initial methods to manage pGCF include local would care and occlusion techniques. Failure of this approach is followed by surgical excision of the fistula tract and closure of the gastrostomy under general anesthesia. We report the first use of a tissue adhesive, 2-octylcyanoacrylate (2OC) (Dermabond; Ethicon, Sommerville, NJ) as a non-surgical method to close pGCF in children. METHODS The families of children presenting to the pediatric surgical division for management of a pGCF were offered the option of 2OC closure. Children not receiving or who failed to achieve closure with 2OC therapy underwent surgery for excision of the pGCF with primary closure of the stomach and soft tissues. RESULTS Seven children underwent 2OC therapy. 57% (4 of 7) of the children had complete closure of the pGCF with 2OC therapy. Three children underwent operative closure without complication. CONCLUSIONS The tissue adhesive 2OC can successfully close a pGCF in children after GT removal. This therapy is cost-effective, non-invasive, does not require general anesthesia, and can be performed in an outpatient setting.

Secondary overtriage in pediatric trauma: can unnecessary patient transfers be avoided?

BACKGROUND In an era of wide regionalization of pediatric trauma systems, interhospital patient transfer is common. Decisions regarding the location of definitive trauma care depend on prehospital destination criteria (primary triage) and interfacility transfers (secondary triage). Secondary overtriage can occur in any resource-limited setting but is not well characterized in pediatric trauma. METHODS The National Trauma Data Bank from 2008 to 2011 was queried to identify patients 15 years or younger who were transferred to pediatric trauma centers. Secondary overtriage was defined as meeting all 4 of the following criteria: injury severity score (ISS) less than 9, no need for surgical procedure, no critical care admission, and length of stay of less than 24 hours. All other transfers were deemed appropriate triage. RESULTS Our definition of secondary overtriage was met in 32,318 patients out of 144,420 transfers (22.4%). Within this group, 37.5% were discharged directly from the emergency department of the receiving hospital without hospital admission. Appropriately triaged patients required a therapeutic procedure in 43.5% of cases. Differences in age, sex, mechanism of injury, and payer status were modest. CONCLUSIONS Secondary overtriage is prevalent in pediatric trauma systems nationwide and is not associated with any particular patient characteristics. Because clinical outcomes and healthcare spending are increasingly scrutinized, secondary overtriage may reflect unnecessary patient transfer and a source of potential cost savings. Development of better guidelines for secondary triage of pediatric trauma patients may enable timely assessment and treatment of children who require a higher level of care while also preventing inefficient use of available resources.

Utilization of a novel unidirectional knotless suture during minimal access procedures in pediatric surgery

BACKGROUND The application of minimally invasive surgery (MIS) for advanced procedures in children is logical. However, the intracorporeal placement and tying of suture can be challenging, leading to prolonged anesthesia and morbidity. We describe our initial experience with the use of a novel unidirectional barbed knotless suture (V-LOC, Covidien, Mansfield, MA) that permits a safe and efficient advanced MIS reconstruction in infants and children. METHODS From August 2010 to February 2012, 11 infants and children underwent diaphragmatic reconstruction utilizing either the absorbable or the permanent V-LOC suture. Data retrieval included gender, weight, diagnosis, operative time, complications and follow up. RESULTS Thoracoscopic or laparoscopic repairs were carried out in all children. Two of the infants with congenital diaphragmatic hernia of Bochdalek (CDH) developed a recurrence at 4 and 6 months of age and required reoperation. There were no other complications or recurrence in the remaining 9 children, and there were no mortalities in the group. CONCLUSION This is the first study to evaluate the use of the unidirectional barbed knotless suture in pediatric surgery. We demonstrate that the use of the V-LOC barbed suture is an innovative, safe and time saving option for pediatric MIS. Prospective analysis with long-term follow-up is required to confirm these initial results and to ascertain if this novel approach can be utilized in other pediatric surgical conditions.

Ultrasound-Guided Percutaneous Central Venous Access in Low Birth Weight Infants: Feasibility in the Smallest of Patients

PURPOSE The insertion of tunneled central venous access catheters (CVCs) in infants can be challenging. The use of the ultrasound-guided (UG) approach to CVC placement has been reported in adults and children, but the technique is not well studied in infants. SUBJECTS AND METHODS A retrospective review was performed of infants under 3.5 kg who underwent attempted UG CVC placement between August 2012 and November 2013. All infants underwent UG CVC placement using a standard 4.2-French or 3.0-French CVC system (Bard Access Systems, Inc., Salt Lake City, UT). The UG approach was performed on all infants with the M-Turbo(®) ultrasound system (SonoSite, Inc., Bothell, WA). The prepackaged 0.025-inch-diameter J wire within the set was used in all infants weighing greater than 2.5 kg. A 0.018-inch-diameter angled glidewire (Radiofocus(®) GLIDEWIRE(®); Boston Scientific Inc., Natick, MA) was used in infants less than 2.5 kg. Data collected included infant weight, vascular access site, diameter of cannulated vein (in mm), and complications. RESULTS Twenty infants underwent 21 UG CVC placements (mean weight, 2.4 kg; range, 1.4-3.4 kg). Vascular CVC placement occurred at the following access sites: 16 infants underwent 17 placements via the right internal jugular vein, versus 3 infants via the left internal jugular vein. The average size of the target vessel was 4.0 mm (range, 3.5-5.0 mm). One infant had inadvertent removal of the UG CVC in the right internal jugular vein on postoperative Day 7. This infant returned to the operating room and underwent a successful UG CVC in the same right internal jugular vein. There were no other complications in the group. CONCLUSIONS The UG CVC approach is a safe and efficient approach to central venous access in infants as small as 1.4 kg. Our experience supports the use of a UG percutaneous technique as the initial approach in underweight infants who require central venous access.

Mucous fistula refeeding decreases parenteral nutrition exposure in postsurgical premature neonates

BACKGROUND/PURPOSE Premature neonates can develop intraabdominal conditions requiring emergent bowel resection and enterostomy. Parenteral nutrition (PN) is often required, but results in cholestasis. Mucous fistula refeeding allows for functional restoration of continuity. We sought to determine the effect of refeeding on nutrition intake, PN dependence, and PN associated hepatotoxicity while evaluating the safety of this practice. METHODS A retrospective review of neonates who underwent bowel resection and small bowel enterostomy with or without mucous fistula over 2years was undertaken. Patients who underwent mucous fistula refeeding (RF) were compared to those who did not (OST). Primary outcomes included days from surgery to discontinuation of PN and goal enteral feeds, and total days on PN. Secondary outcomes were related to PN hepatotoxicity. RESULTS Thirteen RF and eleven OST were identified. There were no significant differences among markers of critical illness (p>0.20). In the interoperative period, RF patients reached goal enteral feeds earlier than OST patients (median 28 versus 43days; p=0.03) and were able to have PN discontinued earlier (median 25 versus 41days; p=0.04). Following anastomosis, the magnitude of effect was more pronounced, with RF patients reaching goal enteral feeds earlier than OST patients (median 7.5 versus 20days; p≤0.001) and having PN discontinued sooner (30.5 versus 48days; p=0.001). CONCLUSIONS RF neonates reached goal feeds and were able to be weaned from PN sooner than OST patients. A prospective multicenter trial of refeeding is needed to define the benefits and potential side effects of refeeding in a larger patient population in varied care environments.

A novel continuous stitch fundoplication utilizing knotless barbed suture in children with gastroesophageal reflux disease: a pilot study.

INTRODUCTION The intracorporeal placement and tying of suture (IT) can be challenging leading to prolonged CO2 insufflation, anesthesia, and potential morbidity. The unidirectional barbed knotless suture (V-LOC) has emerged as an innovative technology that has been shown to reduce the time associated with IT. Therefore, we conducted a retrospective analysis comparing our initial experience utilizing V-LOC to perform a novel continuous stitch laparoscopic fundoplication (CF) to standard laparoscopic Nissen fundoplication (NF). METHODS Institutional review board approval was obtained to analyze data on patients who underwent V-LOC CF and NF. Data retrieval included age, gender, weight, diagnosis, procedure, operative time, major complications (reoperation for wrap failure/migration or recurrent symptoms), and follow up. RESULTS Twenty patients underwent the V-LOC CF and gastrostomy placement (GT) from January to October 2013. Seventeen patients underwent NF and GT from March 2012 to February 2013. There were no significant differences in age, weight, or incidence of major complications. V-LOC CF led to a significant 30% reduction in operative time compared to NF (79.1±24.2 min vs. 113.8±25.9 min, respectively, P<0.05). CONCLUSIONS This is the first report documenting the continuous stitch fundoplication utilizing the unidirectional barbed knotless suture in children. Although follow-up is short, the V-LOC CF appears to be a safe and effective technique that may reduce operative time in children with gastroesophageal reflux disease. This technology may be beneficial in other minimally invasive applications in pediatric surgery.

Thoracoscopic Ligation of the Patent Ductus Arteriosus

Patent ductus arteriosus (PDA) ligation is a standard treatment method in infants and children who cannot achieve closure by medical methods. The technical aspects of PDA ligation have continued to evolve since its first description by Dr. Robert Gross at Boston Children’s in 1938. The application of minimally invasive techniques in the form of video-assisted thoracoscopic surgery (VATS) for the management of PDA is now feasible even in the smallest of infants.