Modification Of Surgical Technique Research Articles

Does the crafted abdominal fat grafting technique completely eliminate risk of postoperative CSF leak in endonasal pituitary surgery? Technical note and preliminary clinical outcome.

The endonasal transsphenoidal approach (ETA) developed over the years has become the standard of care for sellar and parasellar lesions. However, because it necessitates the removal of the skull base bone, it is often accompanied by CSF leakage. The authors aimed to provide technical nuances and analyze the results of their routine fat grafting technique after ETA. A consecutive patient cohort (2004-2024) of 168 patients who underwent ETA for sellar and parasellar lesions and the modified fat grafting technique for skull base repair were retrospectively reviewed. Overall, combined ETA and transcranial approach (TCA) was performed in 7 (4.2%) patients, and 4 (2.4%) patients had prior transsphenoidal surgery. The size of the lesion was < 10 mm in 24 (14.3%) patients, 10-30 mm in 93 (55.4%), and > 30 mm in 51 (30.4%). Histopathological diagnoses were as follows: 154 (91.7%) pituitary adenomas, of which 45 (26.8%) were secreting; 8 (4.8%) Rathke's cleft cysts; 2 (1.2%) inflammatory/autoimmune lesions; 2 (1.2%) craniopharyngiomas; 1 (0.6%) renal cell carcinoma metastasis; and 1 (0.6%) chordoma. Gross-total resection was achieved in 127 (75.6%) patients, near-total resection in 22 (13.1%), and subtotal resection/partial resection/biopsy in 19 (11.3%). Overall, 122 (72.6%) procedures had intraoperative CSF leakage. Postoperative CSF leakage was observed in 1 (0.6%) patient treated with a revision operation and regrafting with a slightly larger graft and lumbar drainage. Even slight modifications in contemporary surgical techniques and the addition of an innovative approach may improve the treatment of sellar and parasellar lesions via ETA and reduce the risk of CSF leakage. The authors have developed and described a modified fat grafting technique with gradual crafting and preprocessing of the abdominal fat tissue for skull base repair, and they have demonstrated its effectiveness in significantly reducing the CSF leak rate. This technique enables adequate reconstruction of skull base defects with low donor-site complication rates and obviates the need for external lumbar drainage.

Cataract surgery with endothelial keratoplasty.

This review aims to provide an updated summary of the combined approach of cataract surgery with endothelial keratoplasty (EK), addressing key considerations, including intraocular lens (IOL) choice and calculation, decision between sequential and triple EK, and modifications in surgical techniques and postoperative management. Advances in imaging techniques (Scheimpflug tomography and anterior segment optical coherence tomography) have improved the ability to detect subclinical corneal edema, aiding in surgical decision-making for EK. Recent studies comparing sequential and triple-EK indicate that both methods yield similar visual outcomes. Though triple-EK offers quicker recovery, it may have higher complication rates. The use of gases like SF6 and C3F8 for anterior chamber tamponade is evolving, with conflicting findings on their efficacy in preventing graft detachment. Furthermore, IOL selection remains crucial, as hyperopic refractive surprises are common, and hydrophilic lenses should be avoided owing to the risk of opacification after EK. The combination of cataract surgery with EK has emerged as an effective treatment for patients with corneal endothelial diseases and cataract. Careful preoperative evaluation, appropriate IOL selection, and advances in surgical techniques contribute to better outcomes, although patient-specific factors must guide the choice between sequential and triple-EK procedures.

Standing tall: An innovative approach for cataract surgery in severe kyphoscoliosis

Background: Phacoemulsification, a widely utilized surgical procedure for cataract removal, presents unique challenges in patients with severe kyphoscoliosis due to their inability to lie flat. The conventional positioning and ergonomic setup in cataract surgery must be adapted to accommodate such anatomical variations and ensure successful surgical outcomes.[1-5] Purpose: To describe an innovative surgical technique and ergonomic modifications for performing phacoemulsification in a 70-year-old patient with severe kyphoscoliosis, focusing on performing standing phacoemulsification from an elevated platform to achieve optimal positioning. Synopsis: A 70-year-old lady with severe kyphoscoliosis required cataract surgery but could not lie flat on the operating table. To address this, we modified our surgical technique and ergonomic setup. The operating table was set to the lowest height, with the head end elevated and additional pillows for support. The surgeon performed the surgery in a standing position, but owing to the sitting position, the patient’s eye was still high. We modified the standing phacoemulsification technique by standing on a stool to reach the appropriate height for the operating microscope. Another stool was used to position the foot pedal. Phacoemulsification with multifocal IOL implantation was successfully carried out using this approach, ensuring patient comfort and successful surgical outcomes. Highlights: • Innovative Technique: The procedure involved a standing surgery approach with the surgeon standing on a stool, addressing the challenges posed by the patient’s inability to lie flat. • Ergonomic Adjustments: Adjustments included lowering the operating table, elevating the head end, and adding pillows for support. • Patient Comfort: The partial sitting position ensured maximum comfort and tolerance of topical anesthesia. • Successful Outcomes: The modified technique facilitated the successful completion of phacoemulsification with multifocal IOL implantation in a patient with severe kyphoscoliosis, showcasing the importance of adaptable surgical practices. Video link: https://youtu.be/atF-7E3WL28

Long-term results of primary and revision oncological endoprosthetics

BACKGROUND: Increased overall survival leads to a significant increase in the service life of implants. Currently, no joint replacement systems are failure-free, which reduces the service life. AIM: To assess and systematize the main complications of primary and revision joint replacement surgery, identify the main causes of these complications at various stages of joint replacement based on literature data and analysis of own findings in a large patient population, and develop treatment approaches. MATERIALS AND METHODS: The study included 1,292 patients with primary bone and soft tissue sarcomas, as well as metastatic and benign bone tumors, with 1,671 primary and revision joint replacement surgeries of varying extent performed between January 1992 and January 2020. The proportion of males and females who underwent joint replacement surgery was approximately equal. Joint replacement surgery was performed in 886 (68.6%) patients with primary cancer, 144 (11.1%) patients with metastases to long bones, and 262 (20.3%) patients with benign tumors. RESULTS: During the study period, the overall incidence of complications was 1.4 times higher in the revision joint replacement surgery group (38.1%) compared to the primary joint replacement surgery group (26.6%). The most common type I–IV complications included unstable implants two and more years post-surgery (type IIB) and broken implants (type IIIA). As a result of innovative modifications, the overall incidence of type I–IV complications in primary and revision joint replacement surgery decreased to 16.5% and 24.3%, respectively. The most common cancer-related complication of primary joint replacement surgery was tumor recurrence (type V), accounting for 9.5% of cases. Tapered and cylindrical stems were the best shapes for primary and revision joint replacement surgery. The best stability was observed for 60–100 mm long stems in upper extremity joint replacement and 110–150 mm long stems in lower extremity joint replacement. Stems longer than 160 mm can only be used in revision joint replacement surgery. Adequate perioperative antibiotic prophylaxis reduced the risk of implant site infections. CONCLUSION: High-quality cement mantle formation, stems that match the diameter and shape of the medullary canal, and optimal stem length decrease the incidence of early aseptic instability. The study used a set of preventive measures, including strict compliance with standardized antibiotic therapy regimens during and after surgery, surgical technique modifications, perioperative patient management, and informing patients about the risks of infectious complications. These measures decreased the incidence of early implant site infections after primary and revision joint replacement surgery for a period of 28 years. The efficacy of combination treatment for these diseases has a direct impact on the incidence of local tumor recurrence. Surgical technique modifications based on tumor grade significantly increased treatment efficacy.

Differential linea alba width in pediatric umbilical hernias: a comparative analysis.

This study aimed to investigate the relationship between linea alba width and unclosed pediatric umbilical hernias. A retrospective chart review was conducted on patients with pediatric umbilical hernias persisting beyond the age of 2, from April 2014 to March 2021. Additionally, data from children who underwent computed tomography (CT) for other conditions or injuries, such as diarrhea or traffic accidents, were collected from April 2010 to March 2022. The width of the linea alba was measured using ultrasonography in pediatric hernia patients and CT in children without umbilical hernias. Measurements were taken at five levels on the axial plane: at the level of the umbilicus and 1.5cm and 3cm above and below the umbilicus. The analysis included 191 children without hernias and 30 patients with unclosed hernias, all aged between 2 and 7years. The linea alba width was significantly wider in children with unclosed hernias than in children without hernias at all five measurement points (p < 0.05). The disparity was more pronounced below the umbilicus. However, no significant differences in width were observed across different age groups among children without hernias. Children with umbilical hernias exhibited wider linea albae. It is hoped that these results will contribute to modifications in surgical techniques and enhance understanding of the pathophysiology in patients with umbilical hernias.

A Half-Century of Heterotopic Heart Transplantation in Mice: The Spearhead of Immunology Research

Since the success of solid organ transplants, such as human kidneys, livers and hearts, from the 50s to the 60s in the last century, the field of organ transplantation has progressed rapidly. Mainly due to modifications in surgical operation techniques and improvements in immunosuppressive therapy regimes, organ survival time can now be greatly prolonged. This progress has also been dependent upon the availability of appropriate animal models for organ transplantation. Therefore, the mouse heart transplantation model has developed into an irreplaceable research model for solid organ transplantation, providing indelible contributions to the field. In this review, we will provide an overview of the technical developments in murine heart transplantation, as well as its historical and current role for alloimmune research. Further, we will describe its current fields of application and its scientific achievements before we discuss potential future applications.

Possibilities of intraoperative hemostasis in endoscopic choanoplasty in children

Introduction. Recently, a significant breakthrough has been noted in the surgery of congenital choanal atresia in children: new approaches, various modifications of surgical techniques of choanoplasty have reduced the percentage of complications along with achieving good clinical results in restoring nasal breathing. The outcome of surgery largely depends on adequate hemostasis. Thus, increasing its effectiveness remains relevant.Aim. Evaluation of the effectiveness of intraoperative hemostasis during choanoplasty in patients with congenital choanal atresia (CCA).Materials and methods. The study included 63 children diagnosed with CCA treated at the Veltischev Institute (Moscow). The patients were divided into 2 groups: the main group and the control group. In the main group, hemostasis was carried out by using a bipolar coagulator (power 18 W), periodic irrigation of the surgical field with 1-2 ml of 1% solution of incomplete silver salt of polyacrylic acid (total volume 10-20 ml), in combination with intravenous administration of tranexamic acid in a single dose of 15 mg/kg body weight at a rate of 1 ml/min. In the control group, only coagulation and tranexamic acid were used.Results and discussion. In the main group, the use of incomplete silver salt of polyacrylic acid reduced the average volume of blood loss by 1.3 times compared with the control group.Conclusion. The study showed that the use of incomplete silver salt of polyacrylic acid in hemostasis during choanoplasty in children with CCA is effective.

Factors Contributing to Early Recovery of Urinary Continence Following Radical Prostatectomy: A Narrative Review.

Stress urinary incontinence (SUI) is a common condition in patients following radical prostatectomy (RP), which has a significant impact on all aspects of quality of life and is associated with significant social stigma. The factors that improve urinary incontinence in patients following surgery remain controversial. The aim of our narrative review was to identify and synthesise the latest evidence on pre-, intra- and post-operative factors and predictors that contribute to early continence recovery after RP. In this narrative review, primary resources were identified by searching PubMed, EMBASE and Medline, and secondary resources were collected by cross-referencing citations in the relevant articles. We started our review by searching for systematic reviews of factors and predictors that contribute to early recovery of urinary continence after RP. We then reviewed societal guidelines such as the American Urological Association and European Urological Association guidelines on male urinary incontinence. This review focuses on the pre-, intra and postoperative factors that influence postoperative SUI after RP, as well as highlighting modifications in surgical techniques that lead to early continence recovery. Increasing age, higher BMI, shorter membranous urethral length (MUL), and larger PV are independent prognostic factors for SUI within 3 months after RP. Factors such as modified surgical technique preservation of anatomical structure lead to influence postoperative early continence recovery. SUI after RP is influenced by various factors. These factors include not only anatomical landmarks and patient-related factors such as age, BMI, length of MUL and prostate volume, but also prior transurethral resection or laser enucleation of the prostate, the surgeon's expertise, the surgical approach and NS technique.

Clinical outcomes of retrograde intramedullary multiple pinning for proximal humeral fractures using a modified palm tree technique

Retrograde intramedullary multiple pinning using a modified palm tree technique for proximal humeral fractures has attracted interest from surgeons because of its minimal invasiveness into the soft tissue around the shoulder joints. We aimed to evaluate the clinical and radiological outcomes of this procedure. This retrospective study included 21 patients who underwent surgery using a modified palm tree technique for proximal humeral fractures between March 2010 and March 2022. Patients with two- and three-part proximal humeral fractures that could be reduced by closed manipulation under general anesthesia were included in this study. All patients were clinically evaluated using the Japanese Orthopaedic Association (JOA) and University of California at Los Angeles (UCLA) shoulder scores. Postoperative radiographic findings, including fracture healing and signs of pinning-related complications, were evaluated. Twenty-one shoulders in 21 patients (9 men and 12 women) with mean age at surgery of 66.3±19.3 years were evaluated. The mean period until bone union was 2.6±0.7 months. The mean JOA and UCLA shoulder scores at the final follow-up were 84.8±12.1 and 27.5±5.4, respectively. Perforation of the humeral head by Kirschner (K) wires was observed in 9 of the 21 (42.9%) shoulders. The JOA and UCLA shoulder scores at the final follow-up were not significantly different between the groups with and without perforations (p=0.41 and 0.27, respectively). The oblique or Y-view detected significantly more wires with perforation of the humeral head than did the anteroposterior view (6 vs. 15 wires, p<0.01). The modified palm tree technique for proximal humeral fractures demonstrated good postoperative clinical outcomes and early fracture healing. However, modifications in postoperative management and surgical techniques should be considered to reduce the high rate of perforation of the humeral head by K-wires.

Feasibility of endovascular aortic arch repair after hemiarch replacement for acute type A aortic dissection

Feasibility of endovascular aortic arch repair after hemiarch replacement for acute type A aortic dissection

Modifications of surgical techniques in laparoscopic percutaneous extraperitoneal closure of inguinal ring for childhood inguinal hernia to achieve zero recurrence and zero subcutaneous stitch granuloma.

To present our technical modifications of single incision laparoscopic percutaneous extraperitoneal closure (SILPEC) of the internal inguinal ring (IIR) for pediatric inguinal hernia (PIH). The prospectively collected data of all children diagnosed with PIH undergoing SILPEC at our center from 2016 to 2023 were reviewed and divided into two groups for result comparison: Group A: before and Group B: after the implementation of full modifications. Our modifications included using a nonabsorbable monofilament suture, creating a peritoneal thermal injury at the internal inguinal ring (IIR), employing a cannula to ensure the suture at the IIR ligates only the peritoneum, and double ligation of the IIR in selected cases. 1755 patients in group A and in group B (1 month to 14 years old) were enrolled. There were no significant differences regarding baseline patient characteristics between the two groups. At a median follow-up of 40 months, the rate of recurrent CIH and subcutaneous stitch granuloma (SSG) was 2.3% and 1.5% in group A vs. 0% and 0% in group B (p < 0.001). There were no hydroceles, no ascended or atrophic testis. Our SILPEC technical modifications can achieve zero recurrence and zero SSG for PIH.

Dorsal root entry zone lesioning for brachial plexus avulsion - technical evolution and long-term follow-up.

Brachial plexus avulsion (BPA) injuries can cause severe deafferentation pain. This has been successfully treated with dorsal root entry zone (DREZ) lesioning. Distortions in anatomy following a BPA injury can make identifying neural structures challenging. We describe a modification to the operative technique that improves the surgical view and the advanced intraoperative neuromonitoring (IONM) employed to identify DREZ. We have analysed the long-term outcomes for pain, quality of life, and complications in patients undergoing DREZ lesioning. This is a single-centre retrospective case series including patients who underwent DREZ lesioning with IONM for brachial plexus avulsion between 2012 and 2022. Analysed data included pre- and postoperative pain (VAS), quality of life score for chronic pain, and complications. The evolution of the surgical approach is discussed. 44 consecutive patients underwent a DREZ lesioning procedure with intraoperative monitoring and mapping. In these patients the mean VAS score improved from 8.9 (7-10) to 1.87 (0-6) (p < 0.0001) at the time of discharge. 31 patients were followed-up for more than 12 months with a mean duration of follow-up of 41 months and their results were as follows: the mean VAS improved from 9.0 (7-10) to 4.1 (0-9) (p < 0.0001) at the last follow-up and the mean QOL values improved from 3.7 (2-6) to 7.4 (4-10) (p < 0.0001). The long-term outcomes were 'good' in 39%, 'fair' in 29% and 'poor' in 32% of patients. 55% of the patients were able to stop or reduce pain medications. Modifications of surgical technique provide better exposure of DREZ, and IONM aids in identifying DREZ in the presence of severe intra-dural changes. Long-term outcomes of DREZ lesioning indicate not only a reduction in pain but also a significant improvement in quality of life.

The Novel Parallel Closure Technique Compared to Single-Layer Closure of the Uterus After Primary Cesarean Section Decreases the Incidence of Isthmocele Formation and Increases Residual Myometrial Thickness.

Background Isthmocele or a scar defect is a relatively common consequence of cesarean section resulting in menstrual disturbances and infertility and may compromise the myometrial integrity of the uterus in women contemplating subsequent vaginal birth. Several preventive measures have been suggested, including the modification of surgical techniques used for the closure of the uterine incision. The current study aimed to compare the incidence of isthmocele and assess residual myometrial thickness in women who underwent single versus parallel layered closure to approximate the endo-myometrial layer during cesarean section. Methodology This retrospective study evaluated data of women undergoing their first cesarean section under elective conditions (n = 497) where the uterine incision was closed using a single (n = 295) or a parallel layer (n = 202) technique. Patients were evaluated twice, at 3-6 months and 18 months postpartum, with a transvaginal ultrasound noting the presence or absence of an isthmocele and measurement of the residual myometrial thickness. Results Regardless of the closure technique, 64 (12.9%) women had an ultrasound-diagnosed isthmocele. Significantly fewer patients in the parallel-layer closure group presented with an isthmocele both at 3-6 (13.6 vs. 6.9%; p = 0.019) and 18 months (16.3 vs. 7.8%; p = 0.009) postpartum. Residual myometrium was significantly thicker in the parallel-layer closure group (8.0 vs. 13.2 mm at 3-6 months postpartum; p = 0.000 and 7.2 vs. 12.3 mm at 18 months postpartum; p = 0.004). For all patients, a retroverted position of the uterus at 3-6 months follow-up examination significantly increased the frequency of isthmocele (36/395 (9.1%) with an anteverted uterus and 18/102 (17.6%) with a retroverted uterus; p = 0.002). In patients with a single-layer closure, a retroverted uterus at the 3-6-month follow-up was associated with an isthmocele in 29.5% (18/61) of patients, while no isthmocele was recorded when the uterus was retroverted in the parallel-layer closure group (0/41) (p = 0.001). At 18 months postpartum, of the 64 patients with an isthmocele, 26 (40.6%) presented with abnormal uterine bleeding mainly in the form of postmenstrual spotting. Of the 26 patients with abnormal bleeding, 23 were in the single-layer and three were in the parallel-layer closure group. Conclusions The parallel-layer closure when compared to a single-layer closure of the uterine incision in patients undergoing primary cesarean section decreased the incidence of isthmocele formation and increased residual myometrial thickness. More patients in the single-layer closure group had menstrual cycle disturbances at 18 months postpartum.

Intrahepatic bile duct anatomical variation in liver transplant donors and its implication in liver transplantation

BackgroundFor patients with end-stage liver disease, liver transplantation is considered the chief curative option. Radiological imaging has a pivotal role in evaluating both donors and recipients before and after transplantation. So the purpose of our study is to assess anatomical variant of intra-hepatic bile duct variation among liver transplant donors by MRCP and its implication in liver transplantation. Retrospective study was carried out in Mansoura University Hospitals over period from January 2019 till June 2022. Study included 64 liver transplant donors aged from 21 to 46 years old. All subjects underwent MRCP. Analysis of data obtained from images as well as reconstruction was performed to get images of bile ducts with a maximum intensity projection and volume rendering.ResultsOur study included 64 liver transplant donors. Donor mean age was 29.8 ± 2.57 years with range between 20 and 38 years. There were 40 males (62.5%) and 24 females (37.5%). Regarding right posterior hepatic duct drainage based on Huang classification, the type of bile duct variant was classified as follows: The most common variant was type A1 in 50% of the donors followed by type A4 in 20.3% then type A2 and type A3 in 14.1% each. The distance between RPHD insertion and junction between the right and left hepatic ducts (L) owns a surgical importance as it may need modification of surgical technique if L was more than 1 cm. So according to karakas classification, we had to subtype Huang A1 cases into K1 subtype (L > 1 cm) and K2a subtype (L ≤ 1 cm). Our subjects were 20 with K1 subtype (31.25%) and 12 with K2a subtype (18.75%).ConclusionsAssessment of anatomical variation of right hepatic duct in liver transplant donor by non-invasive method as MRCP had a fundamental role to obtain successful surgical outcome and also to reduce hepatobiliary surgical complications.

Application and Advantages of the Trans-Unco-Discal (TUD) Approach for Cervical Spondylotic Myelopathy and Radiculopathy: Classification and Modification of Surgical Technique Based on the Location of Spinal Cord and/or Nerve Root Compression.

Purpose: We assess the application and advantages of modifying the trans-unco-discal (TUD) approach which we underwent for cervical myelo-radiculopathy. We present the surgical techniques of the modified TUD approach. Materials and Methods: The material was 180 cases where anterior cervical decompression (ACD) was performed by the modified TUD approach. We classified the material into four groups based on the location of the nerve root and/or spinal cord compression: I, compression of the root at intervertebral foramen (IVF); II, compression of the posterior margin of the vertebral body; III, compression of the IVF and posterior margin of the vertebral body; IV, compression of the bilateral IVF and posterior margin of the vertebral body. We applied the modified TUD approach to these four types. We present the surgical procedures and techniques for the modified TUD approach. The Japanese orthopedic association (JOA) score and neuroradiological alignment were examined. Results: The improvement rate of the JOA score was 78.4% at 6 months post-surgery and 77.5% in the most recent examinations. By the modified TUD approach, compressive lesions of the spinal cord and/or nerve roots were removed, and good alignment was acquired and sustained. Conclusions: ACD by the modified TUD approach safely achieved appropriate decompression for the spinal cord and/or nerve roots, and the patients had a high improvement rate and good alignment. Complications were less common than with other surgical procedures. If the TUD approach and endoscopic approaches can be combined, their application to new area is anticipated.

Interdisciplinary Management of Skull Base Tumors.

Endoscopic endonasal skull base surgery has gained acceptance worldwide. Comparative analysis has demonstrated that endoscopic skull base surgery may have advantages for many pathologies of the anterior skull base, e. g., sinonasal malignant tumors; pathologies of the central skull base, e. g., pituitary adenomas, craniopharyngiomas; well-selected cases of planum sphenoidale and tuberculum sellae meningiomas; or for clival lesions, e. g., chordomas, chondrosarcomas, or selected meningiomas. Over the past three decades, interdisciplinary surgical teams, consisting of otolaryngologists and neurosurgeons, have provided detailed anatomical knowledge, suggested new approaches or modifications of established surgical techniques, and offered continued surgical education. A review of pertinent literature was conducted with an emphasis on interdisciplinary endoscopic surgery of skull base lesions. Based on the authors̓ surgical experience in two different interdisciplinary endoscopic skull base centers, the authors classify approaches for endoscopic endonasal skull base surgery, describe indications, and key anatomic landmarks for common pathologies, and highlight surgical techniques to avoid complications. Interdisciplinary endonasal endoscopic surgery combines surgical expertise, improves resection rates for many pathologies, and minimizes morbidity by reducing the incidence of surgical complications.

Decreased Instability in High-Risk (Hip–Spine 2B) Patients After Modifications of Surgical Planning and Technique

Patients undergoing primary total hip arthroplasty (THA) who have spinal deformity and a stiff spine are the highest-risk group for instability. Despite the increasing use of dual-mobility cups and large femoral heads, dislocation remains a major complication after THA. Preoperative planning becomes a critical aspect of ensuring precise component positioning within a safe zone. The purpose of this study was to investigate dislocation rates over a 9-year period. A retrospective review of 4,731 THAs performed by 3 orthopaedic surgeons between January 2014 and March 2023 was performed. Spinopelvic measurements were conducted to determine the hip-spine classification group for each patient. Only patients classified as 2B (pelvic incidence-lumbar lordosis > 10° and Δsacral slope < 10°) were eligible. Both absolute and relative dislocation frequencies were then analyzed using time-series analysis techniques and Fisher's exact tests. A total of 281 hip-spine 2B patients undergoing primary THA were eligible for analysis (57% women; mean age, range: 66 years, 23 to 87; mean body mass index, range: 28, 16 to 45). The overall dislocation rate was 4.3%. Use of femoral head sizes ≥ 40 mm increased from 4% in 2014 to 2019 to 37% in 2020 to 2023 (P < .001), while the use of dual-mobility cups decreased from 100% in 2014 to 2019 to 37% in 2020 to 2023 (P < .001). Acetabular component planning was changed from the supine plane to the standing plane in February 2020. Those changes in surgical practice were notably correlated with a significant decrease in dislocation rates from 6.8% in 2014 to 2019 to 1.5% in 2020 to 2023 (P= .03). Our study demonstrates that the introduction of advanced preoperative THA planning to the standing plane, coupled with precise intraoperative technology for implant placement, can significantly reduce the risk of instability in high-risk THA patients. Notably, we observed a significant decrease in dislocation rates, which aligned with the shift in surgical practice. IV.

Relationship between number of prior lumbar spine surgeries and outcomes following spinal cord stimulator implantation: A multisite, retrospective pooled analysis.

Lumbar spine surgery is a common procedure for treating disabling spine-related pain. In recent decades, both the number and cost of spine surgeries have increased despite technological advances and modification in surgical technique. For those patients that have continued uncontrolled back and/or lower extremity pain following lumbar spine surgery, spinal cord stimulation (SCS) has emerged as a viable treatment option. However, the impact of lumbar spine surgical history remains largely unstudied. Specifically, the current study considers the impact of number of prior lumbar spine surgeries on pain relief outcomes following SCS implantation. We queried the electronic medical record of five separate pain practices for all patients who have undergone a SCS implant between January 1, 2017, and March 1, 2020. Inclusion criteria consisted of any patients with an SCS implant who underwent a prior lumbar spine surgery. The primary outcome was the mean calculated percentage pain relief in patients based on number of prior lumbar spine surgeries. There was a total of 1974 total SCS implant cases identified across five separate pain clinics. There was no difference in mean calculated pain relief in patients with one prior spine surgery versus those with two or more prior spine surgeries (28.2% vs. 25.8%, adjusted β-coefficient -3.1, 95% CI -8.9 to 2.7, p = 0.290). Similarly, when analyzing number of spine surgeries as a continuous variable, there was no association between number of spine surgeries and calculated pain relief (adjusted β-coefficient -1.5, 95% CI -4.0 to 1.1, p = 0.257). Additionally, after patients were stratified based on waveform, there was no association between number of prior lumbar spine surgeries (analyzed both as a categorical and continuous variable) and calculated percentage pain relief. This multicentered retrospective study found that there was no significant difference in pain scores in individuals who received SCS following one or more lumbar spine surgeries. Additionally, the waveform of the SCS device had no statistically significant impact on post-operative pain scores following one or more lumbar spine surgeries.

Primary Endoscopic Stapedotomy

Background: Otosclerosis is a progressive disease of the otic capsule which presents with conductive hearing loss with an intact tympanic membrane. The description of the disease was first given by Valsalva in 1704. Since then, several techniques are described for otosclerosis. All these procedures have traditionally been performed with microscope. New modifications of surgical techniques have been introduced time to time. The concept of minimally invasive surgical techniques has sprung up lately. Recent advances in optics such as high-definition endoscopes have revolutionized the surgeries in otology. Aim: The study aimed to study the feasibility of primary endoscopic stapedotomy. Objectives: (1) The objectives of the study were to evaluate Air-bone gap (ABG) closure in primary endoscopic stapedotomy and (2) to study intra- and post-operative complications in primary endoscopic stapedotomy. Methodology: Thirty patients with otosclerosis underwent stapedotomy using the standard 0.4 mm 18 cm endoscope and high-definition camera system. Results: Of the 30 cases, 17 were males and 13 were females, with a mean age of 39.84 years. A minimal removal of posterosuperior bony canal wall was required in 21 (70%) cases. The average operative time was 65 min. Among intraoperative complications, chorda tympani injury was seen in 2 (6%) cases, and incus subluxation and stapes footplate subluxation in 1 (3%) case each. Pure-tone audiograms done at an interval of 4 months demonstrated improvement across the three speech frequencies (500–2000 Hz) (50.2 dB vs. 23.7 dB). The average postoperative ABG was within 10 dB in twenty (66%) ears and between 10 and 25 dB in the rest ten (33%) ears. Conclusion: Endoscopic stapedotomy is a good alternative tool to conventional operating microscope. It offers better visualization, less trauma while elevating tympanomeatal flap flap, lesser bone curettage, and provides equivalent results.

Modified Anatomical Anterior Cruciate Ligament Reconstruction with Flat Semitendinosus Graft and C-shaped Tibial Canal

Every year, approximately 400,000 patients undergo anterior cruciate ligament (ACL) reconstruction surgery in the United States, accounting for almost 50% of all knee surgeries in the country. Recent studies have demonstrated that the ACL is a ribbon-like structure with a C-shaped tibial insertion and a flat femoral origin. This article introduces a modification of an ACL reconstruction technique. The modification renders the procedure easily reproducible with standard surgical instruments. We will describe a surgical technique modification that goes beyond the standard round bone tunnels and adopts a more anatomical approach using a C-shaped tibial canal and a flat femoral canal using a flat semitendinosus (semi-T) graft. The use of a semi-T graft better reproduces the ribbon-like ACL anatomy. The semi-T graft, a flat femoral canal, and a C-shaped tibial canal provide increased bone-tendon contact surface area and decreased diffusion length, resulting in improved tendon-bone healing. The modification proposed by our team makes the anatomical ribbon-like ACL graft, C-shaped tibial canal, and the flat femoral canal technique feasible in every orthopaedic operating room and mitigates costly specialized instrument.