Comparison of Antibiotic-Coated versus Uncoated Porcine Dermal Matrix.

Background: The objective of this study was to evaluate the antimicrobial performance of a rifampin/minocycline-coated, non-cross-linked, acellular porcine dermal matrix (XenMatrix AB) compared to an uncoated, non-cross-linked, acellular porcine dermal matrix (Strattice) after implantation/inoculation with methicillin-resistant Staphylococcus aureus or Escherichia coli in a dorsal rabbit model.

Methods: Forty male New Zealand White rabbits were bilaterally implanted with XenMatrix AB or Strattice grafts and inoculated with clinically isolated methicillin-resistant S. aureus (5 × 10 colony-forming units/ml) or E.

Evaluation of a fully absorbable poly-4-hydroxybutyrate/absorbable barrier composite mesh in a porcine model of ventral hernia repair.

Background: The objective of this study was to evaluate the mechanical and histological properties of a fully absorbable poly-4-hydroxybutyrate/absorbable barrier composite mesh (Phasix™ ST) compared to partially absorbable (Ventralight™ ST), fully absorbable (Phasix™), and biologically derived (Strattice™) meshes in a porcine model of ventral hernia repair.

Methods: Bilateral abdominal surgical defects were created in twenty-four Yucatan pigs, repaired with intraperitoneal (Phasix™ ST, Ventralight™ ST) or retromuscular (Phasix™, Strattice™) mesh, and evaluated at 12 and 24 weeks (n = 6 mesh/group/time point).

Results: Prior to implantation, Strattice™ demonstrated significantly higher (p < 0.

Evaluation of the Antimicrobial Efficacy of a Novel Rifampin/Minocycline-Coated, Noncrosslinked Porcine Acellular Dermal Matrix Compared With Uncoated Scaffolds for Soft Tissue Repair.

Background Despite meticulous aseptic technique and systemic antibiotics, bacterial colonization of mesh remains a critical issue in hernia repair. A novel minocycline/rifampin tyrosine-coated, noncrosslinked porcine acellular dermal matrix (XenMatrix AB) was developed to protect the device from microbial colonization for up to 7 days. The objective of this study was to evaluate the in vitro and in vivo antimicrobial efficacy of this device against clinically isolated methicillin-resistant Staphylococcus aureus (MRSA) and Escherichia coli.

A Rodent Model to Evaluate the Tissue Response to a Biological Scaffold When Adjacent to a Synthetic Material.

The use of biologic scaffold materials adjacent to synthetic meshes is commonplace. A prevalent clinical example is two-staged breast reconstruction, where biologic scaffolds are used to provide support and coverage for the inferior aspect of the synthetic expander. However, limited data exist regarding either the kinetics of biologic scaffold integration or the host tissue response to the biologic scaffold materials used for this application or other applications in which such scaffold materials are used.

Comparable efficacy with varying dosages of glucarpidase in pediatric oncology patients.

Background: Glucarpidase rapidly reduces methotrexate plasma concentrations in patients experiencing methotrexate-induced renal dysfunction. Debate exists regarding the role of glucarpidase in therapy given its high cost. The use of reduced-dose glucarpidase has been reported, and may allow more institutions to supply this drug to their patients.

Voriconazole plasma concentrations in immunocompromised pediatric patients vary by CYP2C19 diplotypes.

Aim: Our objective was to describe the association between voriconazole concentrations and CYP2C19 diplotypes in pediatric cancer patients, including children homozygous for the CYP2C19*17 gain-of-function allele.

Materials & Methods: A linear mixed effect model compared voriconazole dose-corrected trough concentrations (n = 142) among CYP2C19 diplotypes in 33 patients (aged 1-19 years). Voriconazole pharmacokinetics was described by a two-compartment model with Michaelis-Menten elimination.

Histologic characterization of acellular dermal matrices in a porcine model of tissue expander breast reconstruction.

Background: Acellular dermal matrices (ADMs) have been commonly used in expander-based breast reconstruction to provide inferolateral prosthesis coverage. Although the clinical performance of these biologic scaffold materials varies depending on a number of factors, an in-depth systematic characterization of the host response is yet to be performed. The present study evaluates the biochemical composition and structure of two ADMs, AlloDerm(®) Regenerative Tissue Matrix and AlloMax™ Surgical Graft, and provides a comprehensive spatiotemporal characterization in a porcine model of tissue expander breast reconstruction.

Adverse drug event detection in pediatric oncology and hematology patients: using medication triggers to identify patient harm in a specialized pediatric patient population.

Objective: To investigate the use of a trigger tool for the detection of adverse drug events (ADE) in a pediatric hospital specializing in oncology, hematology, and other catastrophic diseases.

Study Design: A medication-based trigger tool package analyzed electronic health records from February 2009 to February 2013. Chart review determined whether an ADE precipitated the trigger.

Hypersensitivity reaction to high-dose methotrexate and successful rechallenge in a pediatric patient with osteosarcoma.

Hypersensitivity reactions to methotrexate are rare, but have been reported. Methotrexate has shown activity against many malignancies, and omission of methotrexate therapy may increase the risk of cancer-related death in some patients. Therefore, rechallenging patients with methotrexate following hypersensitivity may be beneficial.

Evaluation of ECHO PS Positioning System in a Porcine Model of Simulated Laparoscopic Ventral Hernia Repair.

Purpose. Operative efficiency improvements for laparoscopic ventral hernia repair (LVHR) have focused on reducing operative time while maintaining overall repair efficacy. Our objective was to evaluate procedure time and positioning accuracy of an inflatable mesh positioning device (Echo PS Positioning System), as compared to a standard transfascial suture technique, using a porcine model of simulated LVHR.

Population pharmacokinetics of sirolimus in pediatric patients with neurofibromatosis type 1.

Purpose: The narrow therapeutic index and large interpatient variability in sirolimus pharmacokinetics (PK) make therapeutic drug monitoring necessary. Factors responsible for PK variability are not well understood, and published PK studies do not include pediatric patients with neurofibromatosis type 1 (NF1). The objectives of this study were to estimate sirolimus clearance in a cohort of children with NF1 using data collected in a concentration-guided trial, to evaluate the effect of treatment duration on clearance and dose requirements, and to evaluate the association of sirolimus clearance with patient-specific factors, including age, weight, body surface area (BSA), race, and sex.

Analysis of acellular dermal matrix integration and revascularization following tissue expander breast reconstruction in a clinically relevant large-animal model.

Background: Postmastectomy breast reconstruction remains one of the most frequently performed plastic surgery procedures in the United States. Acellular dermal matrix has been used extensively in expander-implant breast reconstruction and therefore is an appropriate material to be used to develop a clinically relevant animal model of breast reconstruction.

Methods: The study population consisted of 18 female Yorkshire pigs, which were assigned randomly to bilateral expander breast reconstruction with either AlloMax Surgical Graft or AlloDerm Regenerative Tissue Matrix (n = 9 per group).

Characterization of poly-4-hydroxybutyrate mesh for hernia repair applications.

Background: Phasix mesh is a fully resorbable implant for soft tissue reconstruction made from knitted poly-4-hydroxybutyrate monofilament fibers. The objectives of this study were to characterize the in vitro and in vivo mechanical and resorption properties of Phasix mesh over time, and to assess the functional performance in a porcine model of abdominal hernia repair.

Materials And Methods: We evaluated accelerated in vitro degradation of Phasix mesh in 3 mol/L HCl through 120 h incubation.

Pilot induction regimen incorporating pharmacokinetically guided topotecan for treatment of newly diagnosed high-risk neuroblastoma: a Children's Oncology Group study.

Purpose: To assess the feasibility of adding dose-intensive topotecan and cyclophosphamide to induction therapy for newly diagnosed high-risk neuroblastoma (HRNB).

Patients And Methods: Enrolled patients received two cycles of topotecan (approximately 1.2 mg/m(2)/d) and cyclophosphamide (400 mg/m(2)/d) for 5 days followed by four cycles of multiagent chemotherapy (Memorial Sloan-Kettering Cancer Center [MSKCC] regimen).

Patient-reported outcomes and sexual function in vaginal reconstruction: a 17-year review, survey, and review of the literature.

There are multiple techniques used to reconstruct the vagina after oncologic extirpation. However, the long-term functional results of vaginal reconstruction are not well appreciated.A review was conducted of all 27 consecutive patients undergoing vaginal reconstruction from 1990 to 2007.

Computed tomographic angiography in planning abdomen-based microsurgical breast reconstruction: a comparison with color duplex ultrasound.

Background: To plan abdominal perforator-based microsurgical breast reconstruction, duplex ultrasound is often employed to preoperatively identify the location of abdominal wall perforating vessels. Recently, several groups have published the use of computed tomography angiography for preoperative planning in perforator flap breast reconstruction. The purpose of this study was to compare the accuracy of computed tomography angiography in locating clinically useful abdominal wall perforators with that of duplex ultrasound.

Career plans of graduating plastic surgery trainees in 2009: the impact of an uncertain economic climate.

Background: Trainees in plastic surgery graduating in the midst of the current economic recession face unique financial challenges. These issues have the potential to affect future training and practice plans.

Methods: A 13-item questionnaire regarding issues influencing career plans was administered to senior plastic and reconstructive surgery trainees attending the 2009 American Society of Plastic Surgery Senior Residents Conference, in Austin, Texas.

Cell surface biliverdin reductase mediates biliverdin-induced anti-inflammatory effects via phosphatidylinositol 3-kinase and Akt.

Biliverdin reductase A (BVR) catalyzes the reduction of biliverdin (BV) to bilirubin (BR) in all cells. Others and we have shown that biliverdin is a potent anti-inflammatory molecule, however, the mechanism by which BV exerts its protective effects is unclear. We describe and elucidate a novel finding demonstrating that BVR is expressed on the external plasma membrane of macrophages (and other cells) where it quickly converts BV to BR.

Head and neck malignant melanoma: margin status and immediate reconstruction.

Head and neck melanoma often approaches critical structures. Therefore, excision is often limited, leading to positive margins, and increased local recurrence. Immediate reconstruction carries concern for rearrangement or concealment of cancerous tissues.

Symptom outcomes following cranial vault expansion for craniosynostosis in children older than 2 years.

Background: Most craniosynostosis cases are treated by cranial expansion before 1 year of age. Occasionally, patients present at a later age with nonspecific symptoms of increased intracranial pressure. The purpose of this study was to review the symptoms of patients undergoing late cranial vault expansion.

Low-dose inhaled carbon monoxide attenuates the remote intestinal inflammatory response elicited by hindlimb ischemia-reperfusion.

Heme oxygenase (HO) represents the rate-limiting enzyme in the degradation of heme into carbon monoxide (CO), iron, and biliverdin. Recent evidence suggests that several of the beneficial properties of HO, may be linked to CO. The objectives of this study were to determine if low-dose inhaled CO reduces remote intestinal leukocyte recruitment, proinflammatory cytokine expression, and oxidative stress elicited by hindlimb ischemia-reperfusion (I/R).

Patient body mass index and perforator quality in abdomen-based free-tissue transfer for breast reconstruction.

Body mass index (BMI) must be considered when selecting patients suitable for abdomen-based microsurgical breast reconstruction. It is unknown whether BMI or age affects quality or quantity of abdominal wall perforating blood vessels. The purpose of this study was to identify differences in abdominal wall perforating blood vessels among patients with different BMI and age.