Orthopedics Commons^™

Elixhauser Comorbidity Index To Predict Perioperative Bleeding And Adverse Spine Surgery Outcomes, Mitchell K. Ng, Michael A. Mont, Mosadoluwa Afolabi, Prathiksha N V, Amitha Kumar, Stephen S. Johnston

Rothman Institute Papers

Introduction: As spine surgery volume continues to grow, ensuring patient safety and minimizing complications are increasingly critical. Disruptive bleeding—defined as hemorrhagic events requiring clinical intervention—is a significant perioperative challenge. This study aimed to: (1) quantify disruptive bleeding incidence; (2) evaluate associations between patient demographics, Elixhauser Comorbidity Index (ECI), and bleeding risk; and (3) assess the impact of disruptive bleeding on mortality, ventilator use, length of inpatient stay, 90-day readmissions, and inpatient costs. Methods: A nationwide healthcare database was used to identify patients who underwent spine surgery in 2019. Patients were subdivided by the Elixhauser Comorbidity Index (ECI) from 0 to …

P-15 Peptide Enhanced Bone Graft In Transforaminal Lumbar Interbody Fusion: A Randomized, Controlled, Investigational Device Exemption Study Demonstrating Improved Composite Clinical Success, James Harrop, John E. O'Toole, Michael P. Steinmetz, Rick C. Sasso, Christopher D. Chaput, K. Brandon Strenge, Greg Maislin, Jeffrey P. Mullin, Thomas B. Freeman, Anthony Guanciale, Howard Lantner, Michael E. Janssen, David G. Schwartz, John M. Small, Wellington K. Hsu, Paul M. Arnold

Department of Orthopaedic Surgery Faculty Papers

STUDY DESIGN: Prospective, multicenter, single-blind, randomized, controlled pivotal study.

OBJECTIVE: To evaluate whether P-15L (PearlMatrix P-15 Peptide Enhanced Bone Graft) is noninferior in effectiveness to local autograft when applied in single-level instrumented transforaminal lumbar interbody fusion (TLIF).

SUMMARY OF BACKGROUND DATA: P-15L, an FDA-designated Breakthrough Drug-Device, is a composite drug-device combination bone graft containing P-15, a 15-amino acid polypeptide, which enhances cell binding, proliferation, and differentiation, resulting in bone formation.

MATERIALS AND METHODS: Skeletally mature patients, aged 22 to 80 years, with degenerative disc disease (DDD) were randomized 1:1 to P-15L (investigational) or to the local autograft (control) during single-level …

Reliability Of Existing Measures And Classification Systems For Trochlear Dysplasia, Sean R. Waldron, Nihar S. Shah, Matthew W. Veerkamp, Brendan A. Williams, John A. Schlechter, Lauren H. Redler, Matthew D. Ellington, Shital N. Parikh

Department of Orthopaedic Surgery Faculty Papers

BACKGROUND: Patellofemoral instability (PFI) is common in adolescent patients and can lead to a reduction in quality of life and function, as well as long-term arthritis. Treatment of PFI involves assessing and, at times, surgically correcting underlying anatomic abnormalities. Trochlear dysplasia is the most common anatomic risk factor present in PFI.

PURPOSE: To determine the interrater reliability of existing measures and classification systems for the assessment of trochlear dysplasia.

STUDY DESIGN: Cohort study (diagnosis); Level of evidence, 3.

METHODS: As part of the PRISM (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) patellar instability Research Interest Group (RIG) project, a …

How Does Pattern Of Bone Healing Affect The Strain Of Plate Implant Via Frequency Detection? A Biomechanical Cadaveric Study, Chavarin Amarase, Chanyaphan Virulsri, Pairat Tangpornprasert, Pisitpong Chancharoen, Saran Tantavisut

Chulalongkorn Medical Journal

Background: Detecting bone union is a crucial process in treating bone fractures to prevent complications, including implant failure and bone nonunion. Nowadays, there are many methods and new innovative devices for detecting bone union through strain measurements, such as strain gauges, fluid level displacement, contrast media, and frequency changes. There is also a trend toward increasing these methods in the future. However, the patterns of bone healing studied with these methods still do not provide a standard for determining the true bone healing process. The aim of this study is to identify the most appropriate bone healing pattern for …

Comorbidity Profiles Associated With Total Knee Arthroplasty In A Medically Underserved Population, Blake C. Martin, Manoj Peiris

School of Medicine Publications

Introduction: Total knee arthroplasty (TKA) is a common orthopedic procedure that is increasing in incidence and prevalence and is rising in younger populations. The Rio Grande Valley (RGV) represents a medically underserved region in the southern United States characterized by high rates of chronic conditions such as obesity, diabetes, and arthritis. The purpose of this study is to investigate the relationship between pre-existing chronic medical conditions and TKA within this medically underserved and at-risk population.

Methods: This retrospective chart review was conducted using data obtained from University of Texas Rio Grande Valley medical records spanning January 1, 2018, through January …

Hallucinations And Diabetes – Could It Be The Hip? An Interesting Case Of Cobalt Poisoning, Mahrukh Tariq, Zauraiz Anjum

Advances in Clinical Medical Research and Healthcare Delivery

Cobalt (Co) poisoning has been described historically in beer-drinkers when cobalt was used as an additive. In present times, this type of poisoning is usually caused by occupational exposure or metal prosthesis breakdown. We present a case of Co poisoning from metal prosthesis breakdown with exceptionally high levels, and thus, some unique symptoms. Interestingly our patient not only had symptoms commonly associated with Co poisoning, e.g., paresthesia, sensory-neural hearing loss, acute kidney failure, but also developed new onset diabetes, which is not commonly associated with this type of pathology. Moreover, when we had this patient under our care, we had …

Bilateral Congenital Radioulnar Synostosis - Case Report, Derek A. Diangelis, Matthew J. Hudson

Advances in Clinical Medical Research and Healthcare Delivery

A 2-year-old male presented to an orthopedic outpatient office due to a supination defect in both of his upper limbs. X-rays of the affected limbs revealed fusion of the proximal radioulnar joints indicating congenital radioulnar synostosis (CRUS). CRUS is abnormal development of the upper limbs occurring during weeks 3—7 of embryological development. Causes of CRUS include genetic syndromes and spontaneous mutations. Treatment options include nonoperative and surgical treatments, however, treatment is controversial due to a lack of clinical evidence. Proposed screening methods could help improve detection rates and improve clinical management. This report aims to increase awareness of CRUS and …

The Role Of C-Terminal Crosslinking Telopeptide Of Type Ii Collagen (Ctx-Ii) After Anterior Cruciate Ligament Reconstruction: A Systematic Review., Ali Naderi, S Ali Ghasemi, Andrea Fabregas, Gene Shaffer, James Raphael

Orthopedic Surgery Resident Research

Anterior cruciate ligament (ACL) injuries are known to accelerate cartilage degradation and predispose patients to early-onset osteoarthritis. C-terminal cross-linked telopeptide of type II collagen (CTX-II), a biomarker of cartilage breakdown, can be detected in various body fluids, including urine, offering a non-invasive method for evaluating cartilage degeneration. This systematic review aimed to assess existing evidence on urinary CTX-II (uCTX-II) levels following ACL reconstruction (ACLR). A systematic search of two medical databases was conducted in accordance with PRISMA guidelines. Studies were screened for inclusion based on their assessment of CTX-II in human subjects undergoing ACLR, and methodological quality was evaluated using …

Management Of Displaced Supracondylar Fractures Of The Humerus Using Lateral Versus Crossed Kirschner Wires: A Prospective Randomized Controlled Clinical Trial, Ashlee Dobbe, Emily K. Schaeffer, Njalalle Baraza, Firoz Miyanji, Christine Alvarez, Anthony P. Cooper, Chris W. Reilly, Kishore Mulpuri

General Surgery, East Africa

Aims: We sought to evaluate whether loss of reduction in lateral Kirschner (K)-wiring is noninferior to crossed K-wiring in closed reduction and percutaneous pinning of Type III supracondylar humerus fractures.

Methods: A prospective, randomized, non-inferiority trial was conducted. Emergency department patients aged three to seven years with Type III supracondylar humerus fractures were invited to participate with informed consent. Block randomization allocated patients into one of two pin configuration groups (lateral or crossed). Surgical technique and postoperative management were standardized between groups. All patients were treated with above-elbow casts, but no strict standardized protocol was applied. The primary outcome was …

Does Hormone Replacement Therapy Reduce Bone Resorption In Postmenopausal Women With An Intact Uterus?, Ashley Harding

PCOM Physician Assistant Studies Student Scholarship

OBJECTIVE: The objective of this selective EBM review is to determine whether or not hormone replacement therapy reduces bone resorption in postmenopausal women with an intact uterus.

STUDY DESIGN: A systematic review of three double blind randomized control trials (RCTs) published from 2016 to 2022.

DATA SOURCES: All RCTs were published in peer reviewed journals in English and were found on PubMed and Google Scholar. Articles were chosen based on relevance to the clinical question.

OUTCOME MEASURED: Level of bone resorption was measured via assessment of bone turnover markers at baseline and after use of hormone replacement therapy in all …

Preoperative Malnutrition Is Associated With Increased Postoperative Complications Following Lumbar Fusion: A Propensity-Matched Analysis, Ali Mehaidli, Muaaz Wajahath, Jad Lawand, Omar Abdalla, Lorenzo Deveza, Noah Hodson, Ryan J Berger, Kevin Taliaferro

Faculty, Staff and Students Publications

Background: Lumbar fusion (LF) is a common surgical intervention for degenerative spinal conditions but carries significant short- and long-term risks. Preoperative malnutrition, characterized by low serum albumin or leukocyte counts, impairs wound healing and increases susceptibility to infection, yet its influence on LF outcomes remains underexplored. This study evaluates the association between preoperative malnutrition and long-term postoperative outcomes following LF.

Methods: Adult patients undergoing LF between 2003 and 2023 were identified in the TriNetX US Collaborative Network. Malnutrition was defined as serum albumin < 3.5 g/dL or leukocyte count < 1,500/mm3 within 1 year preoperatively. A 1:1 propensity score match was performed for demographics, comorbidities, surgical approach, and body mass index (BMI), yielding two cohorts (n=20,693 each). Ninety-day and 5‑year postoperative outcomes were compared using hazard ratios (HRs) with 95% confidence intervals (CIs).

Results: Malnourished patients experienced significantly higher 90‑day rates of transfusion (8.4% vs. 4.5%; HR 1.87, 95% CI: …

Partial Versus Full Revision In Cementless Single-Stage Exchange For Hip Periprosthetic Joint Infection: A Multicenter Comparative Study With 10-Year Survivorship Analysis, Wenbo Mu, Atthakorn Jarusriwanna, Boyong Xu, Scot A. Brown, Xiaogang Zhang, Alexander Dawes, Javad Parvizi Md, Li Cao

Rothman Institute Papers

BACKGROUND: Periprosthetic joint infection (PJI) is one of the most challenging complications following total hip arthroplasty (THA). Traditional management typically involves full revision to ensure comprehensive infection eradication. However, for patients with well-fixed implants, partial revision in a single-stage cementless approach may provide a viable alternative, potentially preserving bone stock and reducing operative time. The relative efficacy of this approach compared with full revision remains to be fully explored. This multicenter study aims to determine whether partial revision in cementless single-stage exchange surgery offers comparable infection control outcomes to full revision for select patients with well-fixed implants.

METHODS: We conducted …

Elbow Ulnar Collateral Ligament Reconstruction And Repair: A Systematic Review And Meta-Analysis Of Biomechanical Studies, Austin Looney, Adeeb Hanna, Carlo Coadonato, John Sonnier, Blake Bodendorfer, Christopher Anderson, Neil Sarna, Kevin Freedman, Michael G. Ciccotti, Michael C. Ciccotti, Brandon Erickson, Steven Cohen

Rothman Institute Papers

BACKGROUND: Technical variations in elbow ulnar collateral ligament reconstruction (UCLR) include graft source, graft/tunnel configuration, and humeral and ulnar fixation. While the biomechanical performance of various constructs has been reported, these studies have small sample sizes and compare at most a few technical variations.

PURPOSE: To quantitatively synthesize the results of biomechanical investigations of UCLR and repair.

STUDY DESIGN: Systematic review.

METHODS: A systematic review and meta-analysis was conducted according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses); included articles were published between 1998 and 2020. Biomechanical metrics were utilized to compute effect sizes (standardized mean difference [SMD]) …

Teriparatide Use In Osteopenic Patients Undergoing Single-Level Lumbar Fusion Associated With Decreased 2-Year Revision Rates, Mitchell K. Ng, Ariel N. Rodriguez, Abigail Razi, Ahmed K. Emara, Brian T. Ford, Ameer Tabbaa, Divya Gouni, Jacquelyn J. Xu, Paul G. Mastrokostas, Jad Bou Monsef, Afshin E. Razi

Rothman Institute Papers

Context:  Low bone density is common among lumbar fusion patients and increases the risks of pseudarthrosis, hardware failure, and revision. Teriparatide improves bone mass and fusion in osteoporosis, but its benefit in osteopenia or normal bone remains uncertain.

Aims:  To evaluate the association between teriparatide exposure and (1) postoperative complications, (2) 90-day readmission, and (3) 2-year reoperation, stratified by bone health status (osteoporotic, osteopenic, and normal) in patients undergoing single-level lumbar fusion.

Setting and Design:  A retrospective cohort study using the PearlDiver database from 2010 to 2021 identified patients undergoing single-level lumbar fusion.

Subjects and Methods:  Patients on teriparatide were …

High-Dose Oral Pyrophosphate Inhibits Connective Tissue Calcification In Abcc6 Null Mice But May Affect Bone Structure, Ibtesam Rajpar, Nicholas Yancy, Jacob Beiriger, Christina Shao, Syed Naqvi, Deana Mancuso, Fatemeh Niaziorimi, Ryan E Tomlinson, Koen Van De Wetering

Department of Orthopaedic Surgery Faculty Papers

Pseudoxanthoma elasticum (PXE) is a rare inherited disorder marked by abnormal calcium phosphate deposition in soft connective tissues, particularly the skin, arteries, and eyes. It is caused by inactivating mutations in the ABCC6 gene, which encodes a hepatic efflux transporter. Loss of ABCC6 function leads to reduced plasma levels of pyrophosphate (PPi), a key inhibitor of calcification, thereby promoting ectopic mineralization. Oral PPi therapy has emerged as a potential treatment, but its effectiveness is uncertain. Most ingested PPi is hydrolyzed in the gut to inorganic phosphate, which may worsen calcification. Moreover, its impact on mineralized tissues remains largely unexplored. Abcc6−/− …

Repair Techniques For Acute Rupture Of The Patellar Tendon: A Systematic Review, Gaston Davis, Harrison S. Fellheimer, Christian Mccormick, Kevin B. Freedman

Rothman Institute Papers

BACKGROUND: Multiple techniques exist to repair acute tears of the patellar tendon. Surgical repair is required to reestablish full function of the extensor mechanism of the knee, and optimal results typically occur when the tear is repaired acutely.

PURPOSE: To systematically review the literature to evaluate treatment outcomes and complication rates after acute surgical repair of patellar tendon ruptures using suture anchor repair, transosseous repair, and end-to-end repair.

STUDY DESIGN: Scoping review; Level of evidence, 4.

METHODS: A systematic review was performed to analyze outcomes after patellar tendon repair in accordance with the PRISMA (Preferred Reporting Items for Systematic Reviews …

Regional Anesthesia Utilizing Liposomal Bupivacaine, With Or Without Dexamethasone, Provides Excellent Pain Control And Minimizes Opioid Consumption Following Anterior Cruciate Ligament Reconstruction, William L. Johns, Armen Voskeridjian, Benjamin Miltenberg, Rahul Muchintala, Christopher C. Dodson, Steven B. Cohen, John Salvo, Matthew Sherman, Michael G. Ciccotti, Sommer Hammoud

Rothman Institute Papers

BACKGROUND: Perioperative nerve blocks are commonly used for regional analgesia with anterior cruciate ligament (ACL) reconstruction (ACLR). Liposomal bupivacaine (LB) is a long-acting anesthetic agent providing up to 72 hours of nerve blockade. It is theorized that the addition of dexamethasone to LB (LB+dex) may prolong the analgesic duration.

PURPOSE: To characterize pain control and opioid consumption with adductor canal block (ACB), interspace between the popliteal artery and capsule of the posterior knee (iPACK), and suprasartorial infiltration (SSI) regional anesthetic techniques utilizing LB after ACLR and to compare LB versus LB+dex.

STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. …

Posterior Subperiosteal Abscess Of The Distal Femur In A Pediatric Patient: A Rare Surgical Presentation Of Acute Hematogenous Osteomyelitis, Michael Dearman, Corey Bindner

School of Medicine Student Publications and Presentations

Introduction: Pediatric osteomyelitis commonly arises from acute hematogenous spread and remains diagnostically challenging due to limited radiographic findings and difficulty obtaining MRI in young children. Subperiosteal abscess formation is an uncommon but serious complication, with posterior distal femoral involvement reported only once previously.

Case Report: A 19-month-old male presented with fever and refusal to bear weight. Initial radiographs were unremarkable. Worsening symptoms prompted admission with rising inflammatory markers and blood cultures positive for gram positive cocci. MRI demonstrated distal femoral metaphyseal osteomyelitis with a posterior subperiosteal abscess. Through an anterior arthrotomy and metaphyseal drilling, osteomyelitis and joint involvement were addressed. …

Evaluation Of Micronized, Electrospun Fiber Matrix Effect On Outcomes Of Major Lower Extremity Amputations., Michael Dearman, Brittany Wagner, Alireza Behbudi, Luis Fernandez, Alan Cook, Rebecca Swindall, Brandi Pero, Alisha Thedford

School of Medicine Student Publications and Presentations

Background: Major lower extremity amputations are associated with substantial postoperative morbidity and mortality (Belmont). Restrata is a synthetic electrospun fiber matrix that is engineered to closely resemble human extracellular matrix to facilitate wound healing while avoiding the drawbacks of traditional biologic wound matrices (MacEwan, Fernandez). There have been no studies which have directly compared micronized electrospun fiber matrix (MEFM) to biologic xenograft matrices in patients undergoing major lower extremity amputation. The purpose of this study is to compare postoperative wound recovery in patients undergoing major lower extremity amputation, treated with MEFM (Restrata Minimatrix, Acera, St.Louis, Missouri ) versus a type …

Evaluation Of Micronized, Electrospun Fiber Matrix Effect On Outcomes Of Major Lower Extremity Amputations, Michael Dearman, Brittany Wagner, Luis Fernandez, Alireza Behbudi, Alan Cook, Rebecca Swindall, Brandi Pero, Alisha Thedford

School of Medicine Student Publications and Presentations

No abstract provided.