Implanted size and structural valve deterioration in the Edwards Magna bioprosthesis.

Background: The desire of patients to avoid anticoagulation, together with the potential of valve-in-valve (VIV) transcatheter aortic valve replacement (TAVR), have resulted in the increasing use of bioprosthetic valves for aortic valve replacement (AVR). While patient-prosthesis mismatch (PPM) is known to be an adverse risk after AVR, few studies have addressed the effect of PPM on valve durability. This study evaluates the role of valve size and hemodynamics on long term durability after AVR with a Magna bioprosthesis. Methods: We performed a retrospective, single-center evaluation of patients who underwent a surgical AVR procedure between June 2004 through December 2022 using the Magna bioprosthesis. Perioperative information and long-term follow-up data were sourced from the institution's Society for Thoracic Surgeons Adult Cardiac Surgery Registry and outcomes database. Cumulative incidence of freedom from reintervention were estimated accounting for competing events. Group comparisons used Gray's test. Results: Among 2,100 patients, the mean patient age was 69 years (range, 22-95 years), of whom 98% had native aortic valve disease, 32.5% had concomitant coronary bypass grafting, and 19% had mitral valve surgery. Median follow-up was 5.8 (1.9-9.4) years, during which 116 reinterventions were performed, including 74 explants and 42 VIV procedures. Nine hundred and twenty-eight patients died prior to reintervention. Incidence of all cause reintervention was 1.2%, 4.5%, and 11.7% at 5, 10, and 15 years, respectively. Smaller valve size was associated with worse survival (P<0.001), but not with reintervention. Higher mean gradient at implant was associated with increased late reintervention [sub-distribution hazard ratio: 1.016; 95% confidence interval (CI): 1.005 to 1.028; P=0.0047, n=1,661]. Conclusions: While reintervention rates are low for the Magna prosthesis at 15 years, the analysis is confounded by the competing risk of death. PPM, as reflected physiologically by elevated post-operative valve gradients, portends an increased risk of intervention. Further study is necessary to elucidate the mechanism of early stenosis in patients who progress to reintervention.

Successful beating-heart repair of pulmonary artery dissection using a composite valve-tube graft.

Pulmonary artery dissection is rare but highly lethal. Recent reports suggest that surgical repair of pulmonary artery dissection may yield good outcomes in selected patients, although postoperative right ventricular failure and death have been described. Currently, only one patient over age 60 years old has been reported to survive open surgical repair of pulmonary artery dissection. Here, we present the case of a sexagenarian with pulmonary artery hypertension complicated by a dissected pulmonary artery aneurysm which was successfully repaired using a composite valve-tube graft under a beating-heart strategy.

Symptomatic Extra-Adrenal Myelolipoma in the Spleen.

A 42-year-old male patient presented with intermittent abdominal pain and gastrointestinal discomfort present for 4 years. Work-up included ultrasound and computed tomography, which identified a fat-containing splenic mass 5.6 cm in size. Due to recurrent symptoms, the patient sought medical care again. Subsequent images showed an increase in size to 7.6 cm, which was concerning for neoplasm. This was removed via open splenectomy, which was challenging due to intra-abdominal adhesions despite never having had any abdominal surgery. The patient's recovery was uncomplicated. Pathologic assessment indicated that the mass was a myelolipoma. Extra-adrenal myelolipomas are rare and typically found within the retroperitoneum but are extremely rare within the spleen. This case report adds the 6th such case to the literature and demonstrates the need for it to remain in the differential diagnosis of patients with fatty splenic masses, as well as that splenectomy is an appropriate treatment.

A case report on delayed diagnosis of perforated Crohn's disease with recurrent intra-psoas abscess requiring omental patch.

INTRODUCTION: Intra-abdominal abscesses associated with Crohn's disease (CD) can rarely occur in the psoas muscle. An intra-psoas abscess is prone to misdiagnosis because its location mimics other diseases, like appendicitis and diverticulitis [1]. PRESENTATION OF CASE: We present the case of a 25-year-old female with an 11-year history of CD, previously well-controlled on Remicade, who presented with right lower quadrant (RLQ) pain and CT findings of a right psoas abscess initially attributed to perforated appendicitis. Two percutaneous drainages pre-ileocecectomy, laparoscopic ileocecectomy, three percutaneous drainages post-ileocolectomy, and evidence of a recurrent abscess prompted diagnostic laparoscopy. The abscess was unroofed and debrided. A flap of omentum was used to fill the abscess cavity. A comprehensive literature search was performed using the terms 'Crohn's abscess', 'intra-psoas abscess', and 'omental patches' in Medline and on PubMed. DISCUSSION: We attribute the abscess' recurrence to possible epithelialization of the abscess cavity. Intra-psoas abscesses, albeit rare, are a known manifestation of CD. Percutaneous drainage is the initial standard of care, although diagnosis can be difficult given its association with several diseases, which can delay definitive treatment. We summarize a recently proposed and agreed upon treatment scheme for the management of the Crohn's patient with an abdominal abscess. We also propose the novel technique of omental packing in abscess management. CONCLUSION: Clinician awareness must be heightened for perforating CD in the setting of abscess refractory to either multiple drainage procedures, although care should be taken to individualize treatment to each CD patient who presents with an abdominal abscess.

Review and update: robotic transanal surgery (RTAS).

As the field of surgery advances, new approaches have allowed surgeons additional flexibility to perform further interventions with minimal or no external incisions. For many years, single site access (SSA) has been used for transanal procedures, and platforms allowing modified endoscopic approaches have been available. These platforms have limitations related to access, visualization, dexterity, camera control, and instrumentation. Recently, surgical robotics companies have developed and introduced new technologies and platforms, which may help address some of these limitations. Comprehensive internet, open access, and medical and industry conference reviews of robotic surgery platforms and technology available for use in SSA surgery were conducted and 30 articles were found using keywords "robotic surgery, transanal, single site, robotic transanal surgery". A PubMed, Medline, Journals @OVID and open access search for data related to these platforms and technologies was also performed yielding 11 articles. Abstracts were reviewed for those written in the English language, leaving 40 articles which were then filtered for those pertaining to robotic surgery, transanal. 58 abstracts were found, duplicates were eliminated, and the remaining 35 articles were read in their entirety by two reviewers. Several new and existing platforms are identified for use in SSA surgery for transanal surgery as well as abdominal and transoral surgery. These are reviewed, including brand, features, approved and suggested uses, and potential limitations. New robotic technologies serve to enhance the ability of surgeons to perform SSA surgery. This next generation of robotic surgery technology overcomes some of the limitations of preceding endoscopic SSA surgery technology and will enhance the advancement of robotic transanal surgery, but outcomes and performance data are still limited.

Telemedicine and telerobotics: from science fiction to reality.

Advances in communication technologies have paved the way for telemedicine to transform the delivery of medical care throughout the world. Coinciding developments in minimally invasive surgery and in particular teleoperated robotic surgical systems will allow the surgeon to deliver expert care in remote locations. This study presents a systematic review of telemedicine, focusing on telerobotic surgical systems. A brief historical review of telemedicine and telerobotics is provided, including a description of the various subtypes of telemedicine. Currently available systems and recent experimental utilization, including long-distance remote telesurgery, are discussed. Experimental telerobotic surgical systems and future developments in the field are reviewed and the potential applications are considered. Future challenges to the implementation and opinions on the future direction of telerobotics are provided in this review.

Endometriosis-associated nerve fibers and pain.

The assessment and diagnosis of endometriosis remain elusive targets. Patient and medical-related factors add to delays in the detection and treatment. Recently, investigators have revealed specific nerve fibers present in endometriotic tissue, with existing parallels between density and pain severity. The aim of this review is to compile a comprehensive review of existing literature on endometriosis-related nerve fiber detection, and the effects of medical therapy on these neural fibers. We performed a systematic literature-based review using Medline and PubMed of nerve fibers detected in eutopic endometrium, endometriotic lesions, and the peritoneum. Various arrangements of significant medical terms and phrases consisting of endometriosis, pelvic pain, nerve fiber detection/density in endometriosis, and diagnoses methodology, including treatment and detection were applied in the search. Subsequent references used were cross-matched with existing sources to compile all additional similar reports. Similar nerve fibers were detected within lesions, endometrium, and myometrium, though at varying degrees of density. Hormonal therapy is widely used to treat endometriosis and was shown to be related to a reduction in fiber density. A direct result of specific nerve fiber detection within eutopic endometrial layers points to the use of a minimally invasive endometrial biopsy technique in reducing delay in diagnosis and subsequent possible preservation of fertility.