Subclavian Vein Research Articles

Near-zero fluoroscopy technique for cardiac electronic device implantation: long-term outcomes

Abstract Introduction Radiation hazards are a major concern for both patients and staff. We have previously described a near-zero fluoroscopy technique for cardiac electronic device implantation. In this study, we aimed to investigate the long-term safety of this technique and compare outcomes and procedural metrics with a conventional approach in a larger population. Methods Low-dose fluoroscopy technique. Radiation exposure during fluoroscopy is directly proportional to the time the unit is activated. Typically, the pedal switch is depressed for at least a few seconds per imaging sequence in order to visualize "live" movements of either the leads during their positioning or the needle during a fluoroscopy-guided puncture of the subclavian vein. Our technique consists of setting a low frame rate per second (0.5-3.75fps) and momentarily triggering the foot pedal switch only to obtain screenshots of the position of the leads/needle. Use of live electrograms to assist spatial awareness of lead position (e.g. Atrial, Coronary Sinus, Ventricular signals) acts as an adjunct to guidance. Study design We included consecutive patients undergoing permanent pacemaker (PPM) or cardiac defibrillator (ICD) implant at our center from July 2018 to December 2022 using the near-zero fluoroscopy technique. Procedures were performed by three operators (AC, MD, MF). Cumulative radiation dose was measured using dose-area product (DAP). We assessed procedure success and complication rate during long-term follow-up. We compared the procedural metrics and outcomes with a cohort of patients with PPM or ICD implanted in our centre by senior operators, using a traditional fluoroscopic approach. Propensity score was adopted to match baseline characteristics between the study and control group. Results The total population consisted of 412 patients (74.2±13.9 years, 60.9% male). We included 206 who underwent PPM or ICD implantation using the low-dose fluoroscopy technique, and 206 matched-control. A PPM or ICD was successfully implanted in all patients. Fluoroscopy time and DAP were significantly lower in the low-dose fluoroscopy group, mean 2.3±2.0 seconds versus 258.4±252.1 seconds (P<0.001) and 3.4±3.5 µGym2 versus 29.8±55.4 µGym2 (P<0.001), respectively. Mean procedure time was 49.0±20.8 minutes in the low fluoroscopy group and 65.7±26.8 minutes in the control group (P<0.001). Median frame per second setting was 0.5 in the low-dose cohort. After a mean follow-up of 441±470 days, the rate of complications was identical across groups (2.4%, p = 1.0). Conclusion This near-zero dose fluoroscopy technique is effective and safe, enabling a 10x reduction in radiation exposure during device implant. Modification of traditional implant and imaging techniques can provide material reductions in fluoroscopy dose to even below that for a standard PA chest radiograph.

A CASE OF DUAL–SITE LEFT VENTRICULAR PACING PERFORMED VIA A PERSISTENT LEFT SUPERIOR VENA CAVA IN A PATIENT WITH COMPLETE ATRIO–VENTRICULAR BLOCK AND RIGHT SUPERIOR VENA CAVA OCCLUSION

Abstract Patient A 64 year old male admitted for syncope. EKG presented 3rd degree AV block. Attempting to place temporary pacemaker was unsuccessful due to occlusion of the right femoral vein and the presence of a catheter for hemodialysis in the left femoral vein. He also has complete thrombosis of the right internal jugular vein, proximal superior vena cava and right femoral vein. He was referred to ICCU for monitoring, asymptomatic with no signs of congestion or hypoperfusion. Dopamine was started at 4 mcg/kg/min and then isoprenaline 0.06 mcg/kg/min. Initial work up Echocardiography showed depressed LV ejection fraction (LVEF 40%). Chest and abdomen angio–CT showed persistence of a superior left vena cava (PSLVC), which drained in the coronary sinus (CS). Right axillary and subclavian veins were occluded, and also right superior vena cava and right jugular vein. Left jugular, axillary and subclavian veins were pervious. Left femoral and right iliac–femoral veins showed significantly narrowing of the vessel lumen. Diagnosis and Management Our indication for this patient was CRT rather than RV pacing. The implant of a leadless AV pacemaker was also considered, but it was considered unfeasible due to limited access from the femoral veins. The presence of a PSLVC cava draining into CS was confirmed with angiography in the EP Lab. At the beginning of the procedure two episodes of asystole occurred. A first bipolar lead was rapidly placed in a postero–lateral branch of the CS, to obtain a stable temporary pacing. We then placed a quadripolar, active fixation, left ventricular pacing lead via the PSLVC into an antero–lateral branch of the CS. Finally, we placed a right atrium active fixation pacing lead in the right atrium again through the PSLVC. Vascular accesses were cephalic left vein and axillary vein. Acceptable sensing and pacing parameters were achieved. The bipolar LV lead was connected to the IS–1 RV port for sensing and the quadripolar lead was connected to the IS–4 LV port for pacing. Programming was DDDR 60–130 with active LV pacing only. Total procedural time was 180 minutes. No complications occurred. At discharge electric parameters were stable. Echocardiography showed an improvement in LVEF (45% vs 40%) and ECG showed atrio–ventricular LV pacing. Conclusion As far as we know this is the first reported case of a CRT delivered by two left ventricle pacing leads both placed via a PLSVC, with no need to place a pacing lead in the right ventricle.

LIMITATIONS IN THE USE OF SUBCUTANEOUS DEFIBRILLATOR IN PATIENTS WITH LOW BODY MASS INDEX

Abstract Introduction Subcutaneous defibrillator is an effective and widely used tool in clinical practice but the presence of large fluctuations in the body mass index and the reduction of subcutaneous tissue may limit its application to all patients. Case Report In 2014, a 51–year–old woman underwent implantation of a dual–chamber transvenous defibrillator with left subclavian vein approach in secondary prevention for long Qt syndrome (LQT3). About 6 years after implantation she presented a ventricular lead breakage due to subclavian crush syndrome and was subjected to multiple inappropriate shocks due to lead failure. For this reason, the transvenous defibrillator was replaced with a single–chamber pacemaker for atrial stimulation and a subcutaneous defibrillator was implanted (Fig.1). In the following years the patient lost 14 kg and in the first months of 2022 she complained of the onset of stabbing pain in the precordial region near the upper face of the left sixth rib on the midclavicular line (Fig.2). Over the months, this symptomatology has become increasingly limiting and poorly responsive to normal analgesics but only to opiates; furthermore the pain has also occurred after a few weeks at the left parasternal level along the course of the distal portion of the subcutaneous catheter. For this reason, after discussing the case with the patient, we proceeded to implant a new transvenous lead via left subclavian vein and upgrade to a dual–chamber defibrillator. Subsequently, in the same operating session, the subcutaneous defibrillator was removed, finding only a modest traction resistance of the catheter in the parasternal area, resolved with the use of a 10 French introducer used as a sheet to debride the course of the same from the fibrotic adhesions (Fig .3). In the days following the procedure, the patient reported a progressive total disappearance of the pain symptoms. Reassessed after one year, the patient reports subjective well–being with total absence of chest pain and good quality of life. Conclusions The subcutaneous defibrillator represents an important resource for the management of the main ventricular arrhythmias, especially in patients with a high risk of infection and with a long life expectancy. The presence of a stable amount of subcutaneous tissue is a necessary condition to guarantee the tolerance of the lead over time and to avoid chronic pain situations that can lead to its removal.

Balloon venoplasty for right heart catheterization from the arm in patients with subclavian vein stenosis.

In the trans-radial era, arm venous access for right heart catheterization (RHC) is rising. Procedural success is affected by many factors, including subclavian/innominate vein stenosis (SVS) and pre-existing wires or catheters. In a study published previously by the same authors, 2% of cases had unsuccessful RHC through the arm, predominantly due to SVS. Since that study, techniques to improve RHC success rates have been developed, including crossing the stenosis with a coronary guidewire, followed by balloon dilatation. We aimed to determine whether subclavian/innominate venoplasty allows successful RHC in patients with SVS. Our retrospective study included patients who had RHC from the arm between November 1, 2019, and December 31, 2022 that was unsuccessful due to the inability to pass a catheter through the SVS, and then underwent balloon venoplasty. The success rate of completed RHC was then assessed. Out of 2506 RHCs via arm access, 2488 were successful with a catheter alone or over a guidewire. In 18 patients, venoplasty was needed for catheter passage over a guidewire. Post-dilatation, all 18 cases (100%) had successful RHC with a mean procedural time of 35.2 (SD = 15.5) minutes. The most common stenosis site was the subclavian vein in 13 patients (72.2%), and 12 patients (66.7%) had pacemaker/ implantable cardioverter defibrillator wires present. Balloon dilatation of SVS is an efficacious method to improve the success rate of RHC from the arm. It is a safe technique that may prevent cross-over to a different access site, thereby improving patient satisfaction and reducing the possibility of alternate site complications.

An innovative method to prevent guidewire access to the ipsilateral internal jugular vein during pediatric subclavian vein cannulation

ObjectivesCatheter misplacement into the internal jugular vein (IJV) often occurs during pediatric subclavian vein (SCV) catheter placement. The aim of this study was to investigate whether an innovative method of occluding the IJV by applying temporary pressure at the IJV just above the clavicle could help prevent its occurrence. DesignThis is a randomized controlled trial. SettingsThis study was conducted in a single medical center. ParticipantsOne hundred and seventy-eight children undergoing SCV catheterization were recruited. InterventionsChildren were randomly assigned to the traditional group (unassisted placement of the guidewire) and the innovative group (temporary pressure on the IJV just above the clavicle to occlude the IJV during placement of the guidewire). Measurements and Main ResultsThe primary outcome was the incidence of guidewire misplacement into the IJV at the time of first placement. Secondary outcomes included the total number of attempts and the total time of guidewire placement. The incidence of misplacement at the first attempts was reduced from 18.06% in group C to 6.67% in group I (P=0.04). The total number of guidewire entered the IJV in group I was less than in group C [group C vs. group I = 24/96 vs. 7/82, P=0.005]; the total time of guidewire placement was reduced from 35.00s (18.25s, 54.00s) in group C to 26.00s (17.00s, 38.00s) in group I, (P=0.03). ConclusionsTemporary pressure at the IJV just above the clavicle to occlude the IJV during placement of the guidewire helps prevent inadvertent placement of the guidewire into the IJV.

Outcomes following interval delayed first rib resection for acute axillosubclavian deep venous thrombosis

BackgroundCurrent management of axillosubclavian deep venous thrombosis (DVT) often uses thrombolysis for the DVT, prompt first rib removal, and occasional venoplasty or stenting. Our institution has increasingly used anticoagulation alone followed by interval first rib resection. We sought to analyze the effectiveness of this simplified technique. MethodsBetween September 2012 and April 2021, 27 patients were identified within the institution's electronic medical record as having undergone first rib resection for upper extremity DVT. Seven of these patients had undergone preoperative thrombolysis before referral and were excluded. Among the remaining 20 patients, preoperative clinic charts were evaluated for age, venous segment involvement, contralateral limb involvement, presence of documented hypercoagulable state, duration of preoperative and postoperative anticoagulation, and postoperative outcomes. ResultsOf the 20 patients (mean age, 26.2 years; 13 males) presenting with acute axillosubclavian DVT, all patients had right (n = 8) or left (n = 12) arm swelling. Five patients had extremity pain and four had extremity discoloration. Ten had axillosubclavian vein involvement, 9 had subclavian vein involvement, and 1 had axillary vein involvement. Two patients were on oral contraceptives and no patients had any other diagnosed hypercoagulable conditions. The mean duration of preoperative and postoperative anticoagulation was 3.2 ± 2.6 months and 2.1 ± 2.1 months, respectively. Nineteen patients underwent supraclavicular first rib resection and 1 patient underwent transaxillary resection. Twelve patients (60%) demonstrated complete DVT resolution by venous duplex examination during the postoperative period and 8 patients (40%) demonstrated partial recanalization/chronic DVT. Complications included one hemothorax and one thoracic duct injury. All 20 patients remain asymptomatic without arm swelling, with a mean follow-up of 55.1 ± 34.7 months. ConclusionsAmong patients presenting with acute axillosubclavian DVT, anticoagulation alone followed by interval first rib resection proved to be successful in providing symptomatic relief in the short to medium term. By eliminating the need for preoperative thrombolysis and postoperative venograms, this potentially cost-saving algorithm simplifies our management for acute venous thoracic outlet syndrome while maintaining good clinical outcomes. Because this study only analyzed our management algorithm's effectiveness in the short to medium term, the long-term effectiveness of this treatment will need to be demonstrated.

A comparison of internal jugular vein cannulation versus supraclavicular brachiocephalic vein cannulation using ultrasound guidance

Background: Ultrasound has become the standard of care for the insertion of central venous catheters (CVCs) in the intensive care unit. With the introduction of ultrasonography in CVC insertion, there has been an improvement in the success rate and a dramatic decrease in the rate of complications. Aims and Objectives: The aim of this study was to compare the safety and ease of insertion of ultrasonically guided cannulation of the internal jugular vein (IJV) with that of the supraclavicular subclavian vein (SCV) in adult patients undergoing various surgical procedures. Materials and Methods: All the patients in whom central venous cannulation was planned were assigned to two groups. Group I underwent ultrasound-guided IJV while as Group II underwent cannulation ultrasound-guided SCV cannulation. A comparison was made between the two groups, of the success rates, durations of procedure, number of attempts at needle redirections, difficulties if any during insertion of guidewires, and the complications encountered. Results: The IJV group had a higher proportion of first-attempt success (93.2% versus 62.7%). The IJV group had a lesser incidence (3.2%) of complications such as guidewire progression and needle redirections compared with SCV (15.2%). The frequency of adverse events did not differ between the two study groups with an incidence in 3.2% in IJV group and 9.6% in the subclavian group. Higher first-attempt success rates and fewer procedural complications were seen with ultrasound-guided IJV. Conclusion: IJV central venous catheterization is an easier and less invasive and less risky procedure for patients.

Challenging repair of the left subclavian vein in a pediatric patient.

This is a case involving a 3-year-old child who presented with an iatrogenic left subclavian/innominate vein lesion, leading to severe bleeding and intravascular catheter rupture during its removal. We successfully performed a very challenging and minimally invasive repair of the vein, along with the removal of the catheter entrapped in the innominate vein.

Ultrasonographic Evaluation of the Effect of Patient Position on Size of Subclavian Vein: An Observational, Prospective Study

Introduction: The use of real time ultrasound guided cannulation of the subclavian vein is increasing in critically ill and surgical patient population. The larger diameter of the veinduringcannulationhelps to reduce the frequency of associated complications. Objectives: To compare change in the diameter of the subclavian vein in 15° head down and 15° head up position with that of the supine position. Methodology: A prospective observational study was conducted among the patients visiting Department of Anesthesia and Critical Care in Birat Medical College Teaching Hospital for elective surgery from April 2023 to January 2024. Results: The diameter of subclavian vein increased by 18.38±9.1% in head down (Trendelenburg) position and decreased by 15.8±9.8 % in head up position compared to supine position when evaluated by real time ultrasound. Conclusion: The head down (Trendelenburg) increases the diameter of the subclavian vein, so this position is advisable during cannulation or any other procedures.

Convergence of the right and left external jugular veins to the midline: a rare finding of anatomical variation

Venous blood from the head and neck are drained mainly by the internal and external jugular veins. The external jugular vein is located in the anterolateral region of the neck taking a complex pathway perpendicularly down the neck to join the subclavian vein, however, there can be anatomical variations that affect its course. To describe an anatomical variation in the left and right external jugular veins discovered during the dissection of a cadaver in Human Anatomy class. The present study is a case report describing an anatomical variation in the external jugular veins observed during a routine dissection for Human Anatomy class at the Faculty of Medical Sciences of Minas Gerais on an adult male cadaver of unknown age, preserved in formaldehyde solution. the dissection showed that the right and left external jugular veins converged toward the midline, joining just above the level of the jugular notch. Knowledge of variations in the neck superficial venous system is crucial to avoid complications from medical procedures. The present variation was not found described in the literature.

Using Agitated Saline and Point-of-Care Ultrasound to Confirm Central Venous Catheter Placement: A Quality Improvement Project by Advanced Practice Providers

Central lines placed in the internal jugular or subclavian vein are common among critically ill patients. A chest x-ray serves as the confirmation method in many institutions. However, ultrasound with agitated saline has been proven an effective, faster, and safer alternative. Visualizing microbubbles in the right atrium within 2 seconds can confirm correct placement. This quality improvement project describes the training and competency evaluation of advanced practice providers in using agitated saline with point-of-care ultrasound to confirm central venous catheter placement. Sharing our experience and data may encourage others to implement similar quality improvement efforts.

On the way to the azygos vein: a road of return rather than ruined

BackgroundThe malposition of central venous catheters (CVCs) may lead to vascular damage, perforation, and even mediastinal injury. The malposition of CVC from the right subclavian vein into the azygos vein is extremely rare. Here, we report a patient with CVC malposition into the azygos vein via the right subclavian vein. We conduct a comprehensive review of the anatomical structure of the azygos vein and the manifestations associated with azygos vein malposition. Additionally, we explore the resolution of repositioning the catheter into the superior vena cava by carefully withdrawing a specific length of the catheter.Case presentationA 79-year-old female presented to our department with symptoms of complete intestinal obstruction. A double-lumen CVC was inserted via the right subclavian vein to facilitate total parenteral nutrition. Due to the slow onset of sedative medications during surgery, the anesthetist erroneously believed that the CVC had penetrated the superior vena cava, leading to the premature removal of the CVC. Postoperative contrast-enhanced computed tomography of the chest confirmed that the central venous catheter had not penetrated the superior vena cava but malpositioned into the azygos vein. The patient was discharged 15 days after surgery without any complications.ConclusionsCVC malposition into the azygos vein is extremely rare. Clinical practitioners should be vigilant regarding this form of catheter misplacement. Ensuring the accurate positioning of the CVC before each infusion is crucial. Utilizing chest X-rays in both frontal and lateral views, as well as chest computed tomography, can aid in confirming the presence of catheter misplacement.

Alternative venous access sites for dual-lumen extracorporeal membrane oxygenation cannulation.

Dual-lumen cannulas for veno-venous (VV) extracorporeal membrane oxygenation (ECMO) support are typically inserted in the right internal jugular vein (RIJV); however, some scenarios can make this venous route inaccessible. This multicentre case series aims to evaluate if single-site cannulation using an alternative venous access is safe and feasible in patients with an inaccessible RIJV. We performed a multi-institutional retrospective analysis including high-volume ECMO centres with substantial experience in dual-lumen cannulation (DLC) (defined as >10 DLC per year). Three centres [Freiburg (Germany), Toronto (Canada) and Vienna (Austria)] agreed to share their data, including baseline characteristics, technical ECMO and cannulation data as well as complications related to ECMO cannulation and outcome. A total of 20 patients received alternative DLC for respiratory failure. Cannula insertion sites included the left internal jugular vein (n = 5), the right (n = 7) or left (n = 3) subclavian vein and the right (n = 4) or left (n = 1) femoral vein. The median cannula size was 26 (19-28) French. The median initial target ECMO flow was 2.9 (1.8-3.1) l/min and corresponded with used cannula size and estimated cardiac output. No procedural complications were reported during cannulation and median ECMO runtime was 15 (9-22) days. Ten patients were successfully bridged to lung transplantation (n = 5) or lung recovery (n = 5). Ten patients died during or after ECMO support. Alternative venous access sites for single-site dual-lumen catheters are a safe and feasible option to provide veno-venous ECMO support to patients with inaccessible RIJV.

Effect of subclavian vein diameter combined with perioperative fluid therapy on preventing post-induction hypotension in patients with ASA status I or II

BackgroundPerioperative hypotension is frequently observed following the initiation of general anesthesia administration, often associated with adverse outcomes. This study assessed the effect of subclavian vein (SCV) diameter combined with perioperative fluid therapy on preventing post-induction hypotension (PIH) in patients with lower ASA status.MethodsThis two-part study included patients aged 18 to 65 years, classified as ASA physical status I or II, and scheduled for elective surgery. The first part (Part I) included 146 adult patients, where maximum SCV diameter (dSCVmax), minimum SCV diameter (dSCVmin), SCV collapsibility index (SCVCI) and SCV variability (SCVvariability) assessed using ultrasound. PIH was determined by reduction in mean arterial pressure (MAP) exceeding 30% from baseline measurement or any instance of MAP < falling below 65 mmHg for ≥ a duration of at least 1 min during the period from induction to 10 min after intubation. Receiver Operating Characteristic (ROC) curve analysis was employed to determine the predictive values of subclavian vein diameter and other relevant parameters. The second part comprised 124 adult patients, where patients with SCV diameter above the optimal cutoff value, as determined in Part I study, received 6 ml/kg of colloid solution within 20 min before induction. The study evaluated the impact of subclavian vein diameter combined with perioperative fluid therapy by comparing the observed incidence of PIH after induction of anesthesia.ResultsThe areas under the curves (with 95% confidence intervals) for SCVCI and SCVvariability were both 0.819 (0.744–0.893). The optimal cutoff values were determined to be 45.4% and 14.7% (with sensitivity of 76.1% and specificity of 86.7%), respectively. Logistic regression analysis, after adjusting for confounding factors, demonstrated that both SCVCI and SCVvariability were significant predictors of PIH. A threshold of 45.4% for SCVCI was chosen as the grouping criterion. The incidence of PIH in patients receiving fluid therapy was significantly lower in the SCVCI ≥ 45.4% group compared to the SCVCI < 45.4% group.ConclusionsBoth SCVCI and SCVvariability are noninvasive parameters capable of predicting PIH, and their combination with perioperative fluid therapy can reduce the incidence of PIH.

Surgery for the Thoracobrachial Crossing Syndrome by a Supernumerary Rib: About a Case

Thoraco-brachial outlet syndrome is little known to the general public. However, it is a relatively common pathology, which generally corresponds to nerve compression in the neck and shoulder region. They would involve compression of the lower trunk of the brachial plexus sometimes of the subclavian vessels as these structures cross the thoracic outlet. The diagnosis is difficult, and gives rise to frequent medical errors and the methods have not been well established. Treatment includes physiotherapy, painkillers and, in the most complex cases, surgery due to mechanical stress. We report the case of a 39-year-old patient suffering from poorly systematized pain in the right upper limb associated with paresthesia and cramps and edema. The radiological assessment revealed a SDTB per supernumerary cervical rib with partial compression of the subclavian artery and vein. She benefited from a resection of the supernumerary rib and release of the crossing followed by physiotherapy. The surgical excision of this rib resulted in complete indolence the day after the operation, lasting one year later. The aim of this article is to present the surgical procedure for this pathology and the interest of which is to recall the physiopathology, the diagnostic means, the indications and the therapeutic strategy.

Free Flap Reconstruction of Sternal Defects after Cardiac Surgery: An Algorithmic Approach for Dealing with Sparse Recipient Vessels.

Sparsity of recipient vessels poses a challenge for microsurgical free flap reconstruction of sternal defects following deep sternal wound infection after cardiac surgery. From January 2013, a standardized algorithm for dealing with sparse recipient vessels was strictly followed. In this retrospective study including 75 patients, we compared operative details, surgical complications, and reconstructive outcomes of patients treated according to this algorithm (group A: January 2013-May 2021; n = 46) with a historical control group (group B: January 2000-December 2012, n = 29). The left internal mammary artery had been harvested for arterial bypass grafting in 40 of 46 cases (87%) in group A and in all cases in group B. The right internal mammary artery (RIMA) and right internal mammary vein (RIMV) were the first choice as recipient vessels. In case of unsuitability of the RIMV, a right cephalic vein (CV) turndown was used for venous outflow. If both RIMA and RIMV proved insufficient, a single-stage arterio-venous loop (AVL) between the CV and subclavian artery (CV-SA AVL), CV and thoracoacromial artery (CV-TA AVL), or subclavian artery and subclavian vein (SA-SV AVL) was established. The algorithmic approach significantly reduced partial flap necrosis [group A: n = 3 (7%) versus group b: n = 7 (24%); P = 0.04], and overall operation time [group A: 360 ± 88 min versus group B: 415 ± 80 min; P = 0.01]. Standardized approaches improve clinical outcomes in microsurgical free flap sternal reconstruction after cardiac surgery.

An Uncoventional Technique: Outflow Vein Tributary access for Central Vein and Cephalic Arch Angioplasty in Dysfunctional AVF

Abstract Introduction: Central venous stenosis (CVS) is a significant and frequently encountered problem in managing hemodialysis (HD) patients. Venous hypertension, often accompanied by severe symptoms, undermines the integrity of the HD access circuit. In CVS, dialysis through an arteriovenous (AV) fistula is usually inefficient, with high recirculation rates and prolonged bleeding after dialysis. Interventions for central vein stenosis in patients with AV access are typically performed with a direct puncture of the fistula outflow vein or taking access from the femoral vein, jugular vein, axillary vein, and basilic vein. Commonly encountered complications with taking access from the fistula vein-puncture site bleeding, hematoma, pseudoaneurysm, thrombosis of arteriovenous fistula; complications noted with femoral vein access are groin hematoma, lower limb deep-vein thrombosis, need for patient immobilization, and groin compression. An alternative approach is to use the outflow vein tributary, such as the cephalic vein tributary, as an access to avoid these potential complications. Aim and Objective: The objective of this study was to evaluate the feasibility and clinical outcomes of central vein and cephalic vein arch angioplasty, utilizing an outflow vein tributary as access, for managing symptomatic CVS in dialysis patients with upper limb vascular access and significant ipsilateral limb edema. Methodology: In a Prospective interventional study conducted at 2 Tertiary care Institutes between 2022 and 2023, a total of 34 patients underwent central vein and cephalic arch angioplasty utilizing an outflow vein tributary as access. Follow-up duration varied among patients. Results: During a 1-year period, a total of 34 patients (20 male and 14 female) underwent interventions for central vein stenosis using a tributary of the outflow vein as an access. These interventions encompassed lesions in the SVC, innominate vein, subclavian vein, cephalic arch, and multisegmental disease. The technical success rate for endovascular treatment stood at 88%. However, in four patients, we encountered difficulties in crossing the lesion despite employing additional access from the great saphenous vein (GSV). Notably, in 23 cases, the entire procedure was successfully completed using access from the tributary vein, whereas in seven patients, supplementary access was obtained from the right GSV. Importantly, none of the patients experienced access site complications. Conclusion: The use of tributary veins as access allows for the use of wide bore sheaths without encountering complications when addressing central vein pathology. Our findings indicate that employing outflow vein tributaries as access for endovascular treatment is both safe and effective in managing central venous disease.

Subclavian Vein Cannulation via Supraclavicular or Infraclavicular Route Which is Better? A Prospective Randomized Controlled Trial.

The subclavian vein is frequently cannulated using ultrasound. There are two techniques of subclavian vein catheterization (SVC): Supraclavicular (SC) and infraclavicular (IC). Though the IC route is often preferred, the SC approach offers several distinct advantages. This study was planned to compare the technique of SVC using SC and IC approaches in terms of catheterization technique and complications in elective surgeries in adults. Sixty American Society of Anesthesiologists (ASA) 1, 2, or 3 adult patients posted for elective surgeries under general anesthesia were recruited. Patients were divided into SC or IC groups randomly. Right-sided subclavian vein was cannulated in both the groups (n = 30). Visualization time, Likert scale, subclavian vein diameter, skin-to-subclavian vein depth, number of attempts, puncture time, ease of guidewire insertion, catheter insertion time, and total procedural time were observed. A comparison of complications for each approach was noted. Total procedural time, time to visualization of the subclavian vein, and puncture time was lower for group SC and higher for group IC. Catheter insertion time was higher with the IC approach than with the SC approach. Better ultrasound view scores were seen in group SC than in group IC. The first attempt success rate was higher in group SC than in group IC. Comparatively, lower complications both during and after the procedure were noted in the SC approach than the IC approach. Ultrasonography (USG) guidance guided SC approach to access the subclavian vein is quicker, relatively secure, and a better technique than the IC approach. Additionally, the SC approach is associated with comparatively fewer immediate and delayed complications. Jaiswal P, Saini S, Chhabra PH. Subclavian Vein Cannulation via Supraclavicular or Infraclavicular Route Which is Better? A Prospective Randomized Controlled Trial. Indian J Crit Care Med 2024;28(4):375-380.

To assess and compare supra-clavicular and infra-clavicular approaches to obtain blood samples from the subclavian vein in cadavers at autopsy

Objectives The study of microbes in the body of a person after death can be perhaps termed appropriately as Post-mortem Human Microbiology. Microbes can indicate the state of bacteremia at the time of death if the blood samples collected at autopsy are taken in an aseptic way from an appropriate sampling site. The aim of the study was to compare the sampling efficacy of the supraclavicular and infraclavicular approaches for both the left and right subclavian veins and determine the most effective approach among the four options. Material and Methods In this study, post-mortem blood samples were collected from both subclavian veins of 30 dead bodies to evaluate the effectiveness of approaches to subclavian veins. To achieve this, blood was collected from one side of the dead body through the supraclavicular approach and the other side through the infraclavicular approach, noting down the number of attempts which were required to successfully obtain at least 10 mL blood sample which is adequate for post-mortem microbiological examination. Results The study revealed that the supraclavicular approach is superior to the infraclavicular method. The left supraclavicular approach yielded maximum successful sample collection (100%) and also showed maximum successful single attempt sample collection (53%) compared to the other three approaches. Conclusion Following recommended aseptic procedures, using the procedure mentioned and obtaining blood samples from the left supraclavicular approach can improve the chances of getting a non-contaminated, adequate sample for Post-mortem Microbiology (PMM).

Impact on nurse workload and patient satisfaction of atrioventricular junction ablation performed simultaneously with conduction system pacing using a superior approach from the pocket compared with the conventional femoral approach.

Conduction system pacing (CSP) and atrioventricular junction ablation (AVJA) improve outcomes in patients with symptomatic, refractory atrial fibrillation (AF). Superior approach (SA) from the pocket, via the axillary or subclavian vein, has been recently proposed as an alternative to the conventional femoral access (FA) to perform AVJA. In this study, we compare the impact of these alternative approaches on nurse workload (NWL) and patient satisfaction. This was a prospective, observational study enrolling consecutive patients undergoing simultaneous CSP and AVJA. Electrophysiology laboratory (EP Lab) NWL was calculated by using a self-developed model. Ward NWL was calculated using the MIDENF® validated scale. Patient satisfaction was collected using the Hospital Consumer Assessment of Healthcare Provider Systems questionnaire. A total of 119 patients were enrolled: in 50, AVJA was primarily attempted with SA, and in 69 with FA. Compared with FA, SA was associated with a lower EP Lab NWL (169.8 ± 26.7 vs. 202.7 ± 38.9 min; P < 0.001) and a lower Ward NWL (474.5 ± 184.8 vs. 808.6 ± 289.9 min; P < 0.001). Multivariate analysis identified SA as an independent predictor of lower EP Lab NWL [hazard ratio (HR) 4.60; P = 0.001] and of lower Ward NWL (HR 45.13; P < 0.001). Compared with FA, SA was associated with a higher patient-reported rating regarding their experience during hospital stay (P = 0.035) and the overall hospital evaluation (P = 0.026). In patients undergoing simultaneous CSP and AVJA, the use of an SA for ablation is a valid alternative to conventional FA. Compared with FA, this approach significantly reduces NWL and is associated with greater patient satisfaction. ClinicalTrials.gov: NCT03612635.