A cross-sectional study on non-infectious dysfunction of hemodialysis cuffed catheter.

Background: Dialysis cuffed catheter dysfunction results in inadequate dialysis, increased sepsis risk, and a shortened catheter life. It may be possible to prolong catheter function by identifying the causes of cuffed catheter dysfunction. Methods: This study was a cross-sectional descriptive study conducted in 2021-2022 on hemodialysis patients with jugular cuff catheters. The catheterizations were performed using the Seldinger technique and were confirmed by fluoroscopy. A 12-month follow-up was conducted with respect to the performance of the cuffed catheter. Results: A total of 123 patients underwent hemodialysis over 2 years via a cuffed catheter. Catheters were most commonly inserted into the right internal jugular vein, with lengths of 19 cm (tip to cuff). The rate of dysfunction of cuffed catheters was 27.6%. Catheter-related thrombosis was the most common cause in 10 cases (29.4%), followed by catheter tip fibrin sheath in 8 cases (23.5%) and catheter tip malposition in 8 cases (23.5%). Furthermore, 18 patients (52.94%) of cuffed catheter dysfunction occurred within 3 months of catheter placement, based on our study. The dysfunction of cuffed catheters on the left side 23 (67.64%) is more prevalent than the right side 11 (32.35%) (P=0.043); the malposition of catheter tips is more prevalent on the left side (P=0.023). Conclusion: Most commonly, cuffed catheter dysfunction is caused by thrombosis, fibrin sheath formation, and catheter tip malposition. Cuffed catheter failure can be reduced by carefully monitoring the catheter's path and tip position, searching for fibrin sheaths when investigating cuffed catheter failure, and preventing thrombotic events.

Challenging the angiosome concept: Delineating peripheral arterial disease patterns in diabetic foot ulcers.

OBJECTIVES: The angiosome concept has significantly impacted diabetic foot ulcer management by highlighting the vascular anatomy's role in wound healing. However, its clinical applicability and validity remain debated due to complexities in foot blood supply and ulcer location determination. METHODS: A cross-sectional study was conducted on 84 individuals with diabetic foot ulcers undergoing lower limb angiography. Demographics, ulcer characteristics, and angiographic data were collected and analyzed using descriptive statistics and relevant tests. RESULTS: Digital subtraction angiography assessed 89 limbs with diabetic foot ulcers; males comprised 54.8%, primarily type 2 diabetes (96.4%), averaging 64.36 ± 10.09 years. Of 129 angiosomes, angiosome 2 (40.3%) had the highest ulcer incidence. Posterior tibial artery (PTA) involvement was predominant (72.9%), while external iliac artery (EIA) and profunda femoris artery (PFA) were least affected (2.4% each). Posterior tibial artery showed 46.5% complete occlusion. Angiosome 2 correlated notably with anterior tibial artery (ATA), peroneal artery (CPA), and PTA, but categorizing angiosomes by supply patterns showed no significant artery correlation (p > .05). CONCLUSIONS: The research indicates inconsistent support for below-the-knee artery involvement correlating with foot ulcer locations in angiosomes. While aiding vascular comprehension, the angiosome concept may not fully elucidate lower limb vascular complexities and ulcer genesis. Factors like collateral circulation should be noticed to understanding ulcer localization and severity, extending beyond angiosomal arterial supply.

Impact of Local Forearm Heating on Pain Intensity and Hemorrhage in Patients Undergoing Radial Artery Cardiac Catheterization: A Pilot Study.

BACKGROUND: Radial artery cardiac catheterization is a common diagnostic and interventional procedure for cardiovascular conditions. Pain and hemorrhage at the access site can cause patient discomfort and complications. This pilot study investigates the potential of local forearm heating to reduce pain and hemorrhage in patients undergoing radial artery cardiac catheterization. METHODS: We enrolled 100 patients scheduled for radial artery cardiac catheterization and randomly assigned them to the heating or control group. The heating group received local forearm heating before sheath removal, while the control group did not. Pain intensity was assessed with a visual analog scale, and hemorrhage was measured by assessing ecchymosis or hematoma size at the catheterization site. Hemodynamic parameters were also monitored. Statistical analysis compared outcomes between the groups. RESULTS: Patients who received local forearm heating had significantly lower pain intensity (4.15 ± 2.73) compared to the control group (5.84 ± 3.34) (P =.009). Hemodynamic parameters and the extent of hemorrhage at the catheterization site did not significantly differ between the heating and control groups (P >.05). No adverse effects related to forearm heating were reported. CONCLUSION: Local forearm heating is a promising intervention to reduce pain intensity without increasing hemorrhage or affecting hemodynamic parameters during radial artery cardiac catheterization. This simple, noninvasive approach has the potential to enhance patient comfort and safety post procedure.

Distal Forearm Arteriovenous Fistula Maturation in Diabetic Hemodialysis Patients.

PURPOSE: Atherosclerotic disease of the forearm arteries can impede the maturation of distal fistulas in diabetic patients. The goal of this study was to look at the maturity of diabetic hemodialysis patients' distal forearm (radiocephalic snuffbox or distal forearm) arteriovenous fistulas. MATERIALS AND METHODS: Patients with chronic renal failure who were candidates for distal forearm radiocephalic arteriovenous fistula implantation were evaluated in this cross-sectional study. Patients' demographic details, underlying disorders, laboratory measurements, vital signs, and information on their surgery were all noted. Patients were checked for fistula development 1 week, 1 month, 2 months, and then monthly until 6 months after surgery. Arteriovenous fistula maturation characterized by optimal blood flow, vessel dilation, and structural adaptations. RESULTS: Among 343 patients (56% male, 44% female, mean age: 57.32 ± 12.48 years), hypertension prevailed (81.9%), followed by hyperlipidemia (42.3%) and coronary artery disease history (25.9%). AVFs achieved 58.3% maturation in 64.98 ± 11.05 days; higher BP during creation correlated with successful maturation (17.02 ± 1.46 mmHg vs 13.90 ± 1.93 mmHg, P < .05). No significant statistical difference found in distal forearm arteriovenous fistula maturation between males (57.8%) and females (58.9%) (P > .005). However, 41.7% of AVFs failed in 18.83 ± 17.89 days. Failed AVFs exhibited lower BP during operation and failure (11.75 ± 1.86 mmHg). Kaplan-Meier analysis depicted maturation probabilities over 90 days post-surgery. CONCLUSION: Diabetes and patient sex did not affect the maturation time of distal forearm AVFs in hemodialysis patients. Increased blood pressure during and after surgery correlated with shorter maturation time.

Hemodialysis Patients with High-Flow Arteriovenous Fistulas: An Evaluation of the Impact on Cardiac Function.

Purpose: : Patients undergoing hemodialysis often experience changes in cardiac function when they have a high-flow arteriovenous fistula (AVF). This study aimed to assess the effect of high-flow AVFs on cardiac function in patients undergoing hemodialysis. Materials and Methods: : A longitudinal study was conducted on hemodialysis patients with high-flow AVFs. Echocardiographic parameters, such as left ventricular ejection fraction (LVEF), left atrial diameter (LAD), left ventricular end-diastolic dimension (LVEDD), right ventricular end-diastolic dimension (RVEDD), inferior vena cava diameter (IVCD), systolic blood pressure, and diastolic blood pressure, were measured and compared before and after AVF creation. Results: : One hundred hemodialysis patients with high-flow AVFs (mean age: 55.95±13.39 years, mean body mass index: 24.71±3.43 kg/m²) were studied. LVEF significantly decreased (51.10%±5.39% to 47.50%±5.79%), while LAD, LVEDD, and IVCD significantly increased after AVF creation (P<0.05). Systolic (132.49±16.42 mmHg to 146.60±17.43 mmHg) and diastolic (79.98±8.40 mmHg to 83.33±9.68 mmHg) blood pressure substantially rose post-fistularization (P<0.001). Notably, LVEF reduction was more significant in brachio-cephalic AVFs (46.29%±4.24%) compared to distal radio-cephalic or snuffbox AVFs (49.17%±7.15%) (P=0.014). Conclusion: : High-flow AVFs can significantly affect echocardiographic parameters in hemodialysis patients, thereby increasing the risk of cardiac failure. Close cardiac monitoring may be necessary for early intervention. Distal AVFs may be preferable in patients with decreased cardiac function.

An Update on Betrixaban, The Challenging Anticoagulant Agent for Extended Venous Thromboembolism Prophylaxis.

ABSTRACT: Venous thromboembolism (VTE) is a prevalent yet preventable cause of death, particularly among hospitalized patients. Studies have shown that the risk of VTE remains high for up to 6 months after discharge, highlighting the need for extended thromboprophylaxis as a viable treatment approach. Despite the availability of several anticoagulant drugs such as vitamin K antagonists, heparinoids, rivaroxaban, apixaban, edoxaban, and dabigatran, none of them has received approval from the US Food and Drug Administration for long-term thromboprophylaxis. However, an emerging factor Xa inhibitor called betrixaban has shown promising results in Phase II and phase III trials, positioning itself as the first and only US Food and Drug Administration-approved anticoagulant for extended thromboprophylaxis in hospitalized patients after discharge. Betrixaban offers distinct pharmacological characteristics, including a long half-life, low renal excretion, and unique hepatic metabolism, making it an attractive option for various theoretical uses. Numerous articles have been published discussing the safety and efficacy of betrixaban, all of which have emphasized its usefulness and practicality. However, there has been limited discussion regarding its weaknesses and areas of ambiguity. Therefore, this article aimed to explore the challenges faced during the approval process of betrixaban and provide a comprehensive review of the literature on its advantages and disadvantages as a long-term prophylaxis approach for VTE. Furthermore, we aim to identify the ambiguous points that require further investigation in future studies.

Chemotherapy Port Peal Away Sheath Embolisation and Removal With Endovascular Snaring.

Chemotherapy port implantation is a common procedure for long-term intravenous access in cancer patients. While generally safe, complications can occasionally occur. This case report describes a rare complication of chemotherapy port placement, specifically peel away sheath embolisation, and its successful endovascular removal using snaring techniques. The purpose of this report is to highlight this uncommon complication and discuss the management strategy employed in our case.

Autologous Blood-Clot Embolisation of Iatrogenic Femoral Artery Pseudoaneurysm Caused by Arterial Sheath Placement; A Case Report.

Iatrogenic Femoral Artery Pseudoaneurysm (FAP) is a common complication that occurs in diagnostic and therapeutic catheterization procedures and can cause morbidity and even mortality in patients. Aneurysm larger than 2 cm, symptomatic or complicated should be treated. Here we report a 59-year-old man with post-catheterization FAP following femoral artery angiography, treated successfully by direct transcatheter autologous blood clot embolisation. To the best of our knowledge, our case report is the first to demonstrate that FAP can be successfully treated endovascularly by autologous blood clot embolisation.

Chronic vertebro-jugular arteriovenous Fistula secondary to hemodialysis catheterization: A case report.

Vertebral artery's iatrogenic arteriovenous fistula due to central venous catheterization is an uncommon vascular complication. This report depicts a case of 21-year-old male patient who underwent central venous catheterization for hemodialysis over 10 years ago and was detected with a vertebrojugular arteriovenous fistula. This report depicts a case of 21-year-old male patient who detected with a vertebrojugular arteriovenous fistula after 10 years of hemodialysis through central venous catheterization. The surgical treatment was successfully performed.

Extensive Acute Lower Extremity Arterial Thrombosis: A Major Thrombus Formation Caused by COVID-19.

Acute thromboembolic events have been frequently reported in patients with coronavirus disease 2019 (COVID-19) due to an increase in the coagulation system activity and endothelial dysfunction. This report describes a patient with COVID-19 who initially reported respiratory symptoms and developed acute lower limb ischemia secondary to extensive macrovascular arterial thrombosis, which was treated with thrombectomy. The development of such extensive arterial thrombosis with anticoagulants at therapeutic doses is a new sign of increased viral pathogenicity, and it is necessary to develop and apply updated prophylaxis protocols for thrombosis in these patients.

Intermittent right upper extremity ischemia in a patient with simultaneous aberrant right subclavian artery and patent foramen ovale: A case report.

BACKGROUND: Upper extremity intermittent ischemia due to non-aneurysmal, not occluded aberrant right subclavian artery (ARSA) is rare. CASE PRESENTATION: We describe a 30-year-old male who suffered from PFO and non-aneurysmal, not occluded ARSA, and presented by intermittent right upper extremity ischemia. He was treated by right carotid subclavian transposition for ARSA and antiplatelet medication for PFO. CONCLUSION: Authors assume that intermittent limb ischemia can occur secondary to anatomical changes in a patient without aneurysmal degeneration or occluded ARSA and the existence of pure PFO without any evidence of venous thrombosis is not enough to prove the paradoxical emboli scenario.

Endovascular Removal of Entrapped Central Venous Catheter Guide Wire.

I present the case of a 24-year-old female patient with a guidewire entrapment during central venous catheter insertion. At first, open surgery was considered to remove the entrapped guidewire; however, after vascular surgery consult, it was removed by a simple endovascular procedure described below in detail.

Brachio-basilic upper arm transposition fistulas vs. prosthetic brachio-axillary vascular access grafts-Which one is preferred for hemodialysis?

INTRODUCTION: There is still controversy on the use of brachio-basilic upper arm transposition fistula (BBAVF) and prosthetic brachio-axillary vascular access grafts (BAPTFE) in patients with no suitable cephalic veins for creating an autogenous brachio-cephalic fistula. METHODS: In a randomized controlled clinical trial, 60 hemodialysis patients who were not a suitable candidate for BCAVF were randomly assigned into two groups: BBAVF and BAPTFE. The patients were clinically followed up to 1 year and the patency rate and access-related complications were compared between the two groups. FINDINGS: Access failure rate in the BBAVF and BAPTFE groups was 30.0% and 36.6%, respectively. The primary patency time was 232.73 ± 113.36 and 261.53 ± 147.37 days, respectively (P = 0.40). Thrombosis formation and infection were the two main causes for access failure, yet indicating no significant difference between the two groups (P > 0.05). DISCUSSION: BBAVF and BAPTFE have comparable clinical outcomes in short-term follow-up. Therefore, BAPTFE can be used as an alternative vascular access for hemodialysis in patients who are not a suitable candidate for BBAVF.

Brachial Vein Transposition with Consecutive Skin Incisions in a Hemodialysis Patient with Absence of Adequate Superficial Veins: A Case Report.

The creation of an arteriovenous fistula instead of a synthetic vascular graft is a smart decision in hemodialysis patients who do not have a suitable superficial vein. Basilic vein transposition (BVT) is a viable option in most cases, except in patients who do not have a proper basilic vein. In patients with inadequate superficial veins, another source of the autogenous vein is the brachial vein, a deep vein of the upper arm. Most surgeons choose a full medial arm incision to perform brachial vein exploration. We describe a patient in whom BVT was not possible and so brachial vein transposition using skip incisions was performed, with good results.

Effect of low dose aspirin and dipyridamole on primary patency of arteriovenous grafts in hemodialysis patients: a randomized double-blind placebo-controlled trial.

BACKGROUND: There is some evidence for the efficacy of antiplatelet therapies in increasing the vascular access patency duration or decreasing the thrombosis of arteriovenous grafts. OBJECTIVE: To determine the effect of low dose aspirin and dipyridamole on primary patency of arteriovenous grafts in hemodialysis patients. METHODS: This randomized, double-blind, placebo-controlled trial was done at Imam Reza Hospital in Mashhad, Iran from September 10, 2015 to July 05, 2016. Sixty hemodialysis patients, after the placement of a new arteriovenous graft, were divided into three study groups which including; Group 1, who received 80 mg aspirin tablet daily, Group 2 received 80 mg aspirin plus 75 mg dipyridamole daily and Group 3 received placebo daily. Primary unassisted patency was recorded in follow-up until 12 months and the outcomes were analysed using one-way ANOVA test. RESULTS: Primary patency time in Group 1 (Aspirin) was 324.75±147.00 day and for Group 2 (Aspirin + Dipyridamole) was 399.05±92.09 day and for Group 3 (Placebo) was 383.55±108.23 day. There were no significant differences between the 3 groups (p>0.05). Successful dialysis was done in 16.7% in Group 1, 37.5% in Group 2 and 45% in Group 3 from brachial arteriovenous grafts after 1-year follow-up (p=0.746). CONCLUSIONS: In treating dialysis patients, treatment with low dose aspirin and dipyridamole is not effective on increasing the synthetic grafts primary patency duration. TRIAL REGISTRATION: The trial was registered at the Thai Clinical Trials Registry (http://www.clinicaltrials.in.th) with the Trct id: TCTR20160920003. FUNDING: The authors received no financial support for the research, authorship, and/or publication of this article.

Influence of thyroidectomy on postoperative serum calcium level regarding serum vitamin D status. A prospective study.

BACKGROUND: Hypocalcemia is a well-recognized complication after total thyroidectomy. Hypovitaminosis D may have additional effect in the development of hypocalcemia. This study aimed to determine the effect of total thyroidectomy on postoperative serum calcium in patients with and without hypovitaminosis D. METHODS: This prospective study was performed on patients who underwent total thyroidectomy from 2011 to 2014 in Imam Khomeini General Hospital of Mazandaran University of Medical Sciences. Serum calcium and vitamin D values were recorded before and after surgery. The patients were classified according to serum vitamin D concentrations as less 10 ng/ml (vitamin D deficiency) or higher (control group). The mean values of postoperative calcium level for each class of serum vitamin D were determined and compared. Hypocalcemia was defined as a postoperative calcium level <8 mg/dl. RESULTS: 125 patients due to thyroid disease underwent total thyroidectomy. The incidence of symptomatic and asymptomatic hypocalcemia after surgery was 12% (n=15) and 3.2% (n=4) respectively. 82 (65.6%) patients had vitamin D deficiency and 43 (34.4%) patients had sufficient vitamin D level. There was not any significant difference in calcium level (8.67±0.58 mg/dl vs. 8.70±0.59 mg/dl) between two vitamin D studied groups after thyroid surgery (p>0.05). CONCLUSION: The findings of this study indicated that vitamin D deficiency had no significant effect on post-thyroidectomy serum calcium level.

Pleurodesis with povidone-iodine, as an effective procedure in management of patients with malignant pleural effusion.

OBJECTIVE: Overtime, malignant pleural effusion (MPE) arises in advanced-stages of malignancies and frequently heralds a poor prognosis. If the underlying malignancy is chemo sensitive, systemic chemotherapy may control pleural effusion. A common method for the management of the patients with refractory MPE is pleurodesis through the introduction of sclerosing agents such as talc, bleomycin administered/instilled into the pleural cavity. However, the present prospective study aimed to investigate the efficacy and safety of pleurodesis with povidone-iodine (Betadine) in patients with MPE admitted in Sari General Hospital during 2008-2011. METHODS: Thirty-six patients who underwent pleurodesis by instilling povidone-iodine through a thoracostomy tube, as a bedside procedure were enrolled in the study. For evaluating the effect of povidone-iodine on thyroid gland, the authors measured the thyroid function tests before and after the pleurodesis at 1 week. RESULTS: The response to this procedure was complete in 26 patients (72.2%) and partial in 7 patients (19.4%). Treatment failure was displayed in 3 patients (8.3%). The overall success rate was 91.6%. In post-procedure, the most common complaints of the patients were pain (35.9%) followed by dyspnea, burning and fever. Povidone-iodine does not affect on thyroid function tests. CONCLUSIONS: Povidone-iodine is an effective, inexpensive, safe and feasible agent for chemical pleurodesis in management of MPE.

Primary patency time of basilic vein transposition versus prosthetic brachioaxillary access grafts in hemodialysis patients.

PURPOSE: The aim of this study was to compare the primary patency time of basilic vein transposition and prosthetic brachioaxillary access grafts in hemodialysis patients. METHODS: In this randomized clinical trial, 60 hemodialysis patients who met the inclusion/exclusion criteria were recruited and randomly assigned to two intervention groups; Basilic vein transpositions (BVT) or Arteriovenous access grafts (AVG). Clinical follow-up for patency of the created accesses in at least one year, was performed at two weeks, one, two, three months and then every three months after surgery. Finally, patency rates and access-related complications were compared in the two groups studied. RESULTS: Thirty BVTs and thirty AVG were performed in each group studied. The groups were well matched for age, sex and comorbidity. After at least one year of follow-up, the access failure rate in the BVT and AVG groups was 23.3% and 30%, respectively. In addition, the mean primary patency time in the BVT and AVG groups was 244.13 ± 103.65 and 264.97 ± 149.28, respectively and there was no statistically significant difference between the two groups studied (P=.533). The common cause of access failure were thrombosis and infection but there were no statistically significant differences between the two groups (P>.05). CONCLUSION: Our results show that AVG offer similar patency and complication rates to BVT. Thus, authors consider them as the preferred hemodialysis access when there are no suitable forearm veins to create arteriovenous fistulas.

A rare cause of small bowel obstruction in adults: left paraduodenal internal hernia.

A 47 years old lady presented with repeated intermittent, colicky, left upper, and periumblical abdominal pain associated with nausea and vomiting since two years prior to admission. Each episode of the pain spontaneously subsided after bilious vomiting. The patient had no history of surgery, abdominal trauma or intra-abdominal infection, weight loss or previous history for small bowel obstruction (SBO). MRI enterography was suggestive of internal hernia and surgery documented left paraduodenal (mesocolic) internal hernia (LPDIH). After surgery the patient was followed for three months without any abdominal symptoms.