Gastric necrosis complicating lately a Nissen fundoplication: Report of a case

Background: Gastric necrosis after Nissen fundoplication is a rare and life-threatening complication described in paediatric surgery and in some experimental models. Prompt diagnosis and appropriate therapy of acute gastric dilatation is mandatory to avoid potentially fatal gastric necrosis. Case report: This case report is the first one to describe a gastric necrosis in an adult as a late and very severe complication after Nissen fundoplication. Gastric dilatation and subsequent necrosis occurred 14years after Nissen fundoplication because of small bowel obstruction based on adhesions. Conclusion: Early diagnosis and treatment of gastric dilatation after Nissen fundoplication are essential to prevent from severe secondary complications but can be difficult to establish because of atypical symptom

Gastric necrosis complicating lately a Nissen fundoplication. Report of a case

BACKGROUND: Gastric necrosis after Nissen fundoplication is a rare and life-threatening complication described in paediatric surgery and in some experimental models. Prompt diagnosis and appropriate therapy of acute gastric dilatation is mandatory to avoid potentially fatal gastric necrosis. CASE REPORT: This case report is the first one to describe a gastric necrosis in an adult as a late and very severe complication after Nissen fundoplication. Gastric dilatation and subsequent necrosis occurred 14 years after Nissen fundoplication because of small bowel obstruction based on adhesions. CONCLUSION: Early diagnosis and treatment of gastric dilatation after Nissen fundoplication are essential to prevent from severe secondary complications but can be difficult to establish because of atypical symptoms

Unexpectedly increased rate of surgical site infections following implant surgery for hip fractures : problem solution with the bundle approach

Surgical site infections (SSIs) are the most common nosocomial infections after surgery.However, clinical guidance on how to handle any suspicious clusters of SSI in orthopaedic surgery is missing. We report on problem analysis and solution finding following the observation of an increased rate of SSI in trauma implant surgery.Setting: Trauma unit of a university hospital

Biomechanical investigation of four different fixation techniques in sacrum Denis type II fracture with low bone mineral density

With increasing life expectancy, fragility fractures of the pelvic ring are seen more frequently. Although their osteosynthesis can be very challenging, specific biomechanical studies for investigation of the fixation stability are still lacking. The aim of this study was to biomechanically evaluate four different fixation methods for sacrum Denis type II fractures in osteoporotic bone. Unstable Denis type II vertical sacrum fractures were created in 16 human pelves. Their osteosynthesis was performed with one sacro-iliac screw, posterior sacral plating, triangular fixation, or spino-pelvic fixation. For that purpose, each pelvis was randomly assigned to two paired groups for treatment with either SI-screw/posterior sacral plating or triangular fixation/spino-pelvic fixation. Each hemi-pelvis was cyclically tested under progressively increasing axial compression. Relative interfragmentary movements were investigated via optical motion tracking analysis. Axial stiffness of triangular fixation was significantly higher versus posterior sacral plating and spino-pelvic fixation (p0.022), but not significantly different in comparison to SI-screw fixation (p=0.337). Cycles to 2, 3, 5, and 8mm fracture displacement, as well as to 3 degrees, 5 degrees, and 8 degrees gap angle at the fracture site were significantly higher for triangular fixation compared to all other groups (p0.041). Main failure mode for all osteosynthesis techniques was screw cutting through the bone, leading loss of fixation stability. From a biomechanical point of view, triangular fixation in sacrum Denis type II fractures demonstrated less interfragmentary movements and should be considered in unstable fragility fractures of the sacrum. (c) 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:1624-1629, 2018

A cadaveric biomechanical study comparing the ease of femoral nail insertion: 1.0- vs 1.5-m bow designs

Introduction Anatomic fit of intramedullary nails was suggested by previous studies to improve significantly when the nail radius of curvature (ROC) is closer to the average femoral anatomy. However, no attempt has been made to investigate the impact of different ROC designs on the nail insertion process. Therefore, this biomechanical study quantitatively compared the ease of insertion between femoral intramedullary nails with a 1.0-m and a 1.5-m bow radius. Materials and methods Long TFN-ADVANCED™ (TFNA, 1.0 m ROC) and Proximal Femoral Nail Antirotation nails (PFNA, 1.5 m ROC) were implanted pairwise into seven paired cadaver femora. All bones were reamed 1.5 mm larger than the nail diameter. Using a material testing machine, intramedullary nailing was then performed stepwise with 20-mm steps and a 10-mm/s insertion rate, and force was measured. The nail deformation caused by the insertion was assessed through 3D computer models built from pre- and post-nailing CT scans. The ease of insertion between TFNA and PFNA nails was quantified in terms of insertion force, insertion energy and nail deformation. Results There was no significant difference in the peak force generated during nailing between TFNA and PFNA nails (P = 0.731). However, the force measured at the end of insertion (P = 0.002) was significantly smaller in TFNA nails compared to PFNA nails. After implantation, TFNA nails showed significantly smaller deformation when compared to PFNA nails (P = 0.005, both ends aligned). Furthermore, less energy was required to insert TFNA nails; however, the difference was not significant (P = 0.25). Conclusions Compared to PFNA nails, a significant decrease in insertion force and nail deformation was found at the end of insertion for TFNA nails. Results suggest that TFNA having a 1.0-m ROC is easier to insert for the set of femora used in this study compared to PFNA with a 1.5-m ROC

Clinical application of a minimally invasive cement-augmentable Schanz screw rod system to treat pelvic ring fractures

PurposeThe purpose of this study is to analyze the results using the USS fracture MIS system (DePuy Synthes) to treat instable pelvic ring fractures. As its outstanding feature, it is the only Schanz screw and rod system at present that combines angular stability, perforation/fenestration of the screws for cement-augmentation, a variable screw length, and a large screw diameter.Materials and methodsRetrospective investigation of 134 pelvic ring fractures treated in 2012-2013. Twenty-five patients obtained the abovementioned implant. Besides baseline characteristics of the included patients and the surgical procedure, a clinical/radiological follow-up of sixmonths was analyzed.ResultsDividing the collective into two groups, I high-energy trauma and II fragility fracture of the pelvis, the following results were recorded: group I: ten patients, six male, age 48.419.7years. Mean ISS 4122.5, fracture classification: AO/OTA type 61 B-1/C-1/C-3=1/5/4. Operative treatment: three transiliac internal fixator, seven iliolumbar fixation, one implant was cement-augmented. Group II: 15 patients, 14 female, age 77.5 +/- 10.1years. Fracture classification according to Rommens: FFPII/(III)/(IV)=6/1/8. Operative treatment: eight transiliac internal fixator, seven iliolumbar fixation, 14 implants were cement-augmented. Overall surgical side complications: 16%. Radiological examination: correct positioning of all ilium screws. Follow-up after sixmonth (16 patients): all showed fracture consolidation. One ilium screw was broken close to the connecting clamp.Conclusion The investigated Schanz screw rod system is a suitable implant to broaden the established procedures to stabilize dorsal pelvic ring fractures.Trial registration The study is registered at the Clinical Trial Registry University of Regensburg (Number Z-2017-0878-3)

Diagnostic challenges and future perspectives in fracture-related infection

Fracture-related infection (FRI) is one of the most challenging complications in orthopaedic trauma surgery. It has severe consequences for patients and an important socio-economic impact. FRI has distinct properties and needs to be addressed interdisciplinary. Since criteria for the diagnosis of FRI are not standardized, an expert panel recently proposed a definition for FRI. In this review the current diagnostic modalities and an interdisciplinary diagnostic algorithm based on this recently published definition, are presented and future diagnostic techniques discussed. Since to date, there is no single universal diagnostic test available that gives the clinician the definitive diagnosis of FRI, it is mandatory to follow a standardized diagnostic algorithm to correctly diagnose FRI.status: publishe

Open Access

Controlled dynamic stability as the next step in “biologic plate osteosynthesis ”- a pilot prospective observational cohort study in 34 patients with distal tibia fracture

Biomechanical comparison of plate and screw fixation in anterior pelvic ring fractures with low bone mineral density

Introduction: Osteosynthesis of anterior pubic ramus fractures can be challenging, especially in poor bone quality. The aim of the present study was to compare plate and retrograde endomedullary screw fixation of the superior pubic ramus with low bone mineral density (BMD). Materials and methods: Twelve human cadaveric hemi-pelvises were analyzed in a matched pair study design. BMD of the specimens was 35 +/- 30 mgHA/cm(3), as measured in the fifth lumbar vertebra. A simulated two-fragment superior pubic ramus fracture model was fixed with either a 7.3-mm cannulated retrograde screw (Group 1) or a 10-hole 3.5-mm reconstruction plate (Group 2). Cyclic progressively increasing axial loading was applied through the acetabulum. Relative interfragmentary movements were captured using an optical motion tracking system. Results: Initial axial construct stiffness was 424 +/- 116.1 N/mm in Group 1 and 464 +/- 69.7 N/mm in Group 2, with no significant difference (p = 0.345). Displacement and gap angle at the fracture site during cyclic loading were significantly higher in Group 1 compared to Group 2. Cycles to failure, based on clinically relevant criteria, were significantly lower in Group 1 (3469 +/- 1837) compared to Group 2 (10,226 +/- 3295) (p = 0.028). Failure mode in Group 1 was characterized by screw cutting through the cancellous bone. In Group 2 the specimens exclusively failed by plate bending. Conclusions: From biomechanical point of view, pubic ramus stabilization with plate osteosynthesis is superior compared to a single retrograde screw fixation in osteoporotic bone. However, the extensive surgical approach needed for plating must be considered. (C) 2016 Elsevier Ltd. All rights reserved