External Jugular Vein Research Articles

Aspectos clínicos, ultrassonográficos e patológicos da tromboflebite iatrogênica em uma égua - relato de caso

ABSTRACT A 7-year-old quarter horse mare showed swelling of the tongue, head and neck region, dyspnea, and red urine after eight days of administration of intravenous medications by the animal's handler. The horse was referred to the University Veterinary Hospital of the Federal University of Pará and, at the clinical examination, showed apathy, edema in the head, neck, and tongue region, which was slightly cyanotic and with loss of epithelium in the dorsal region. The maxillary, linguofacial and external jugular veins were bilaterally engorged, firm to palpation and with cord-shaped appearance, with extension of the head to the entrance to the thoracic cavity. Ultrasound examination showed a thrombi with a hyperechoic and heterogeneous appearance that completely obstructed the vessel. The horse died five days after entering the Hospital and at necropsy it was observed: maxillary, linguofacial and external jugular veins bilaterally filled with firm, dark red to blackish thrombi; ulcerated areas in the final third of the esophagus and the stomach; lighter areas on the surface of the kidneys and dark areas at the corticomedullary junction. Based on clinical, ultrasonographic and necropsy findings, iatrogenic thrombophlebitis was diagnosed, associated with repeated injections of drugs administered intravenously.

Giant cervical lipoma adjacent to carotid artery: a case report and literature review

Cervical lipomas accompanied by neurovascular compression are extremely rare and require surgical treatment in case of appropriate symptoms. The preferable method is gross total resection, as otherwise they tend to recur. Invasive growth is not typical for lipomas. However, large tumors can involve adjacent nerves and vessels and significantly complicate resection. We present a 57-year-old patient who underwent resection of giant soft tissue cervical lipoma invading neurovascular bundle and compressing the oropharynx and esophagus with dysphagia and positional asphyxia. The patient was followed-up for previous 5 years. Resection was necessary due to tumor enlargement with appropriate symptoms. Searching for literature data was performed in the Pubmed, Medline, EMBASE, Cochrane Library and eLibrary databases. Gross total resection of 7-cm tumor was accompanied by mobilization of hypoglossal and vagus nerves, common, external and internal carotid arteries and jugular vein with repositioning of the oropharynx and esophagus. There was mild Horner's syndrome in early postoperative period. The patient was discharged in 4 days after surgery with regression of complaints. We found only 5 reports describing giant cervical lipomas invading neurovascular bundle. Giant cervical lipomas are extremely rare, and total resection with preservation of critical structures is possible in a specialized hospital.

Distribuição das artérias coronárias e análise histopatológica do coração de (Bradypus variegatus)

Abstract The three-toed sloth (Bradypus variegatus) has been a victim of disorderly human interventions, leading to an increase in accidents and diseases for the species. This study aimed to provide a description of the coronary arteries and to high light the histopathological findings in the sloth’s heart. This information should be beneficial for medical clinics dealing with these species. Eighteen B. variegatus specimens were dissected after natural death. Fifteen of them, comprising five adult males, nine adult females, and one juvenile, were fixed with formaldehyde and preserved in saline solution. In two males and one female, red-coloured latex was injected through the left common carotid artery to make the coronary arteries more visible. In the female, blue-coloured latex was also injected through the right external jugular vein to aid in arterial identification. The chests were opened to evaluate and extract the heart for a detailed description of the coronary arteries. For histopathological analysis, histological slides were prepared from four hearts collected from four animals (three adults and one juvenile). Arterial analyses revealed that sloths possess two coronary arteries: one on the right and one on the left side, each of which supplies blood to their respective surfaces. The heart is composed of the endocardium, myocardium, and epicardium, similar to mammals in general. However, necrosis of endocardial tissue and cardiac muscle fbres, as well as myxomatous degeneration of valves and thrombi in vascular lumens, were observed. These necrotic events, more extensive in nature, are related to infarctions, while the more subtle ones may be associated with stressful situations experienced by the individuals.

A Cadaveric Study On Clinical Correlations of the Internal Jugular Vein and its Variations

Introduction: The largest paired vein is the internal jugular vein (IJV), which rests laterally adjacent to the main the common carotid artery (CCA) within the carotid triangle at the extremities of the neck. It is the main source of blood flow down from the sigmoid sinus of dural venous sinuses. The obstruction of blood flow or distension of the internal jugular vein can lead to increasing intracranial pressure in the brain and face. The increased the right atrial pressure can be a sign of heart failure, cardiovascular problems, and pulmonary embolism. The aims are to study and note down variations in the course and relations of the internal jugular vein and variations of tributaries of right IJV and left IJV diameter and effects on cardiovascular diseases. Materials and Methods: An observational based cadaveric study was conducted on twenty-four unclaimed embalmed cadavers were dissected from March 2021 to August 2023 in Bidar Institute of Medical Sciences, Bidar, Karnataka, India. Dissection procedure was followed by Cunningham’s manual of practical anatomy volume-3 book. Variations and pattern of bilateral internal jugular veins were observed. Results: External jugular vein access is a highly advantageous location for a heart catheterization. The tributaries of the internal jugular vein form the trunk and overlap on the common carotid artery bifurcation, which leads to adverse effects on baroreceptors and chemoreceptors at the level of divisions of internal and external carotid arteries. The pattern of the right and left internal jugular is quite significant. Conclusion: The study will generate information that would be useful for surgeons, and other clinical physicians and give necessary morphometric data on the internal jugular vein in the South Indian population.

Effect of the Presence of Cardiac Tamponade on Jugular Vein Diameter in Cases of Cardiac Arrest Due to Thoracic Aortic Disease.

Background There have so far been no reports regarding whether or not the jugular veins remain distended even in cases of cardiac arrest, which is the worst form of shock.We focused on the diameter of the jugular vein in neck computed tomography (CT) in cases of thoracic aortic disease resulting in cardiac arrest to determine whether or not cardiac tamponade increased the diameter. Methodology From January 2014 to December 2021, patients were eligible for inclusion when they were transported to our hospital, judged to be in cardiac arrest at the emergency department, and then diagnosed with thoracic aortic disease as the cause of cardiac arrest according to CT. Patients were divided into two groups according to the presence (tamponade (+)) or absence (tamponade (-)) of cardiac tamponade. Comparisons between the two groups were also conducted after excluding cases in which relief of cardiac tamponade was obtained before CT or that had hemothorax. Results There were 52 cases in the cardiac tamponade (+) group and 16 in the cardiac tamponade (-) group. The diameters of both the right and left internal jugular veins were significantly larger in the cardiac tamponade (+) group than in the cardiac tamponade (-) group. After excluding cases with relief of cardiac tamponade before CT and hemothorax complications, the right and left internal and external jugular vein diameters in the cardiac tamponade (+) group were still significantly greater than those in the cardiac tamponade (-) group. Conclusions The present study showed that the cardiac tamponade induced by thoracic aortic cases tended to display larger internal jugular vein diameters compared to cases without cardiac tamponade, even in patients experiencing cardiac arrest. Additionally, cardiac tamponade consistently presented with larger diameters in the right-sided jugular vein.

Catheterisation of the jugular vein of 12-day-old suckling piglets group-housed with littermates and the sow

Collection of blood samples by venipuncture requires isolation, restraint and immobilisation, which is stressful for piglets and may result in unreliable readings. A jugular vein catheter allows frequent blood sampling with minimal stress to the piglets. Techniques for jugular vein catheter implantation in older pigs have been described, but less information is available for suckling piglets. This report describes the procedure of catheter implantation into an external jugular vein for longer-term frequent blood sampling in 48 12-day (d)-old suckling German Landrace piglets with a mean BW of 3.4 ± 0.7 kg. Catheterisation was performed either under general anaesthesia by injection of azaperone and ketamine (a/k) or by inhalation of isoflurane (IsoF). To determine the optimal incision site in the sulcus jugularis, the centre between the caudal edge of the mandibula, cranial shoulder and sternum was identified. After a small incision of the skin, the jugular vein was bluntly dissected and a catheter was inserted. The tip of the catheter was placed near the beginning of the right atrium. After wound closure, the surgical area was secured by disinfection and bandages. The piglets were returned to their littermates in the farrowing pen immediately after full recovery from anaesthesia, which was 5–7 h in a/k and 0.75 h in IsoF anaesthetised piglets after the onset of the surgery, respectively. The catheter was flushed daily with 0.9% NaCl-0.1% sodium citrate solution. To demonstrate the longer-term benefits of the catheter, on d 4 after surgery, a series of frequent blood sampling were performed after an oral xylose bolus. In total, 10 samples of 0.5 mL were taken before and every 30 min after the oral xylose bolus for 5 h; the blood volume was replaced with 0.9% NaCl solution. On d 4 after surgery, 41 of 48 implanted catheters were considered fully functional (90% of desired samples collected), three as partially functional, and four as non-functional, whereas two catheters were non-functional already from d 1 after surgery. The catheterised animals remained clinically healthy but showed less daily BW gain from age d 12 (day of surgery) to d 15 than non-catheterised control animals (0.12 ± 0.01 vs 0.23 ± 0.01 kg; n = 46; P < 0.05). In conclusion, the catheter implanted into an external jugular vein in 12-d-old suckling piglets remaining with the sow was patent for 4 d after surgery and allowed frequent blood sampling with minimal stress for the piglets.

Intravascular lobular capillary haemangioma of the external jugular vein

AbstractA case of non‐thrombotic intravascular pathology of the external jugular vein. The patient presented with a 5‐week history of a pain‐less lump on the right side of the neck. There was no history of trauma or associated signs or symptoms. Ultrasound imaging showed an intravenous mass that was excised and histopathologically diagnosed as an intravascular lobular capillary haemangioma (IVLCH). The rare tumour most commonly effects the neck, face, and upper extremities. Ultrasound is often the first‐line imaging in such cases, and IVLCH should be considered in the differential under specific circumstances.

Cannulation via the external jugular vein——An alternative to conventional peripherally inserted central catheterisation for paediatric patients

PurposeThis study aimed to describe a peripherally inserted central catheterisation (PICC) for paediatric patients with inaccessible access and a high risk of general anaesthesia (GA). Methods: This was a retrospective observational study involving all paediatric inpatients who performed the PICC via an EJV approach without GA between September 2014 and September 2021 in a provincial key clinical speciality. Results: A total of 290 EJV line placement attempts were performed, and 29 were excluded due to missing placement results, resulting in a sample size of 261. The anatomical localisation, punctures, and catheterisation success rates for this practice were 100%, 100%, and 90.04%, respectively. The placement success rate in children younger than one year was 93.75% (45/48). The median line duration of use was 19 days, with a median length of catheter insertion of 13 cm. The most common complications were catheter malposition (n = 20) and dislodgement (n = 7). Conclusion: The PICC via an EJV approach without GA is a feasible and safe practice with acceptable success and complication rates, and low costs. It might be an attractive alternative for obtaining central vascular access for paediatric patients.

EGS P11 Super-charged colonic interposition after Upper Gastrointestinal tract resections: technical considerations from both benign and malignant cases and review of literature

Abstract Background Oesophageal reconstruction is performed after an oesophagectomy, for either malignant or benign pathology. During reconstruction, variables include choice of conduit, route of reconstruction, and site of anastomosis. The stomach is preferred for neo-oesophageal reconstruction. However, when the stomach is not viable, alternatives including colon, jejunum, skin, or anterolateral thigh (ALT) musculocutaneous flaps are considered. Of these, colon is preferred for its ability to provide long-length grafts and reliable vascular supply. However, complications remain significant problems, including ischaemia at the anastomosis. To address this, 'supercharging’ and ‘super drainage' techniques are used to enhance arterial flow and venous drainage via microvascular anastomosis. Methods Case 1 involves a 61-year-old male who underwent an oesophagectomy for GOJ adenocarcinoma. A year later he developed a strangulated diaphragmatic hernia with an ischaemic gastric conduit, which was replaced with an isoperistaltic colonic interposition using transverse and left colon with super-drainage. 3 years later, the patient presented with pancreatitis, perforated gallbladder, and duodenum. Diffuse ischaemic changes of the interposed colon were recognised. A re-do colonic interposition using right colon with an arterial graft between the right transverse cervical artery and branch of ileal artery and super-drainage via a branch of the ileal and right external jugular veins was created. Results Case 2 involves a 68-year-old female who underwent an elective hiatus hernia repair with Nissen’s fundoplication. She deteriorated shortly post-operatively where re-look surgery found early hernia recurrence causing strangulation of the distal oesophagus and proximal stomach leading to ischaemia, necrosis, and perforation. She underwent a laparotomy and resection of the ischaemic distal oesophagus and proximal stomach, oesophagostomy and feeding jejunostomy. 16 months later, she underwent interposition of the right colon between the proximal oesophagus and remaining stomach. Arterial flow was adequate and supercharging was performed between the left external jugular vein and a branch of the middle colic vein. Conclusions There is limited literature on methods of both supercharging and super-drainage, as well as the optimal choice of organ for neo-oesophageal reconstruction. Currently, no established treatment protocols exist. There is evidence that supercharging and super-drainage are associated with longer operative times. However, benefits include lower leak incidence, shorter duration to oral intake, and reduced length of stay in relation to interposition without supercharge. Associated venous congestion may contribute to anastomotic leak, and may be prevented by super-drainage. Whilst supercharging has been reported worldwide, our case series adds to the UK practice showing it improves patient outcomes in an NHS setting.

Comparison of manual compression, Z-stitch, and suture-mediated vascular closure device techniques in dogs undergoing percutaneous transvenous intervention

Introduction/objectivesManual compression has been standard of care for maintaining hemostasis after percutaneous endovascular intervention, but can be time-consuming and associated with vascular complications. Alternative closure methods include the figure-of-eight suture (Z-stitch) and vascular closure device (VCD) techniques. We hypothesized that compared to manual compression, Z-stitch and VCD would significantly reduce time-to-hemostasis after transvenous access, and the proportion of dogs with vascular patency would not differ significantly among treatments. AnimalsForty-six client-owned dogs undergoing percutaneous transvenous interventional procedures. Materials and methodsDogs with vessel diameter <5 mm were randomized to undergo manual compression or Z-stitch, while those with vessel diameter ≥5 mm were randomized to undergo manual compression, Z-stitch, or VCD. Time-to-hemostasis, bleeding scores, presence of vascular patency one day and two to three months post-procedure, and complications were recorded. Data are presented as median (95% confidence interval). ResultsIn all 46 dogs, the right external jugular vein was used. Time-to-hemostasis was significantly shorter in the Z-stitch (2.1 [1.8–2.9] minutes) compared to VCD (8.6 [6.1–11.8] minutes; P<0.001) and manual compression (10.0 [10.0–20.0] minutes; P<0.001) groups. Time-to-hemostasis was significantly shorter in the VCD vs. manual compression (P=0.027) group. Bleeding scores were significantly greater at 5 and 10 min (P<0.001 and 0.013, respectively) in manual compression, compared to Z-stitch group. There was no difference in the proportion of dogs with vascular patency between groups (P=0.59). ConclusionsZ-stitch and VCD are effective venous hemostasis methods after percutaneous transvenous intervention, with Z-stitch providing the most rapid time-to-hemostasis. Both Z-stitch and VCD techniques have low complication rates and effectively maintain vascular patency.

Abstract 032: Ovine Models for Cerebral Venous Catheter Access: A Single Center Experience

Introduction Large animal models are utilized for preclinical neuroendovascular research, and aid in the characterization and de‐risking of novel therapeutic approaches. To date, only a single prior study has been published providing a detailed account of an ovine model (Corriedale sheep) for cerebral venous access. The generalizability of these experiments has not yet been validated externally. In an effort to replicate these findings and de‐risk a novel, non‐surgical trans‐dural venous sinus approach to the cerebrum, cerebral venous access was attempted in 3 sheep specimens using transcranial and endovascular approaches. We report our experience validating this large animal model for translational and preclinical research. Methods 3 animal experiments were performed at the UCLA TRIC laboratory between 02/2022 and 10/2022. The sheep were anesthesitized and handled under approval of the Animal Research Committee at UCLA (protocol ARC 2020‐19). The neck and groin areas were shaved and aseptically prepped. MRI Brain and MR Brain venogram imaging was performed on a 3T Siemens Magnetom MRI. Femoral artery and external jugular vein access were obtained using the Seldinger technique under ultrasound guidance and did not require a surgical cut down. Two Suffolk and one Rambouillet sheep were used (average weight 60 kg and 40 kg, respectively). The animals were transferred to the catheter laboratory and image guidance was performed with a monoplane Siemens Artis Zeego. A transcranial approach to the dorsal sagittal sinus was attempted in one Suffolk sheep specimen utilizing a Hubly Drill and a micro‐puncture kit. An endovascular approach to the dorsal sagittal sinus was attempted in second Suffolk sheep specimen using a 25 cm, 8 Fr Pinnacle Sheath via the external jugular vein followed by a 132 cm Catalyst 5 catheter, 0.027" Medtronic Marksman, Stryker SL‐10 and Offset microcatheters assembled over 0.014" Synchro Standard and exchange‐length Choice PT microguidewires. In a third experiment, an endovascular approach to the dorsal sagittal sinus was attempted in a Rambouillet sheep specimen using a 95 cm TracStar, 115 cm Catalyst 5 catheter, and 0.027" Medtronic Marksman microcatheter assembled over 0.014" Synchro Standard and exchange‐length Boston Scientific (BS) Choice PT microguidewires. The 0.027" Marksman microcatheter was subsequently exchanged for a 2.7 French BS Stingray LP coronary CTO re‐entry microcatheter in the Rambouillet sheep, which was tracked to the anterior third of the dorsal sagittal sinus over the exchange length wire. Results A transcranial approach to the dorsal sagittal sinus was complicated by misaligned needle trajectories resulting in brain parenchymal damage. The external jugular vein was the conduit for accessing the first and second emissary veins of the retroauricular foramen (figure 2). Access to the temporal and then transverse sinuses was possible from either of the aforementioned emissary veins. Interestingly, the morphology of the dorsal sagittal sinus was bifid and each vessel channel measured between 1.65 – 1.7 mm in diameter (figure 1). Access to the temporal sinus from an endovascular approach was possible with all microcatheters. However, access with a 0.027" microcatheter beyond the torcular herophili and into the dorsal sagittal sinus was only possible in the Rambouillet sheep despite its smaller body size. Intermediate catheters (&gt;4 Fr) could not be advanced beyond the skull base in none of the sheep breeds. Lastly, microcatheter advancement into the cerebral hemispheric space across a transdural venous sinus puncture access point deliberately created by wire perforation was feasible from the Stingray re‐entry system after exchanging for a 0.017" microcatheter. A coil (Stryker Target) was deployed extravascularly from the 0.017" microcatheter for post‐mortem characterization (figure 3). Conclusion One of three experiments met criteria for success. Due to reliance on a monoplane projection, a transcranial approach failed as an access route to the dorsal sagittal sinus resulting in iatrogenic parenchymal damage. Despite the larger body size, the second Suffolk sheep dural venous sinus system could not be catheterized beyond the skull base, likely due to the small caliber or focal stenosis of the temporal or transverse sinuses. The Rambouillet sheep breed proved to be a more adequate specimen for cerebral venous—specifically dorsal sagittal sinus—access with larger bore microcatheters. Based on this experience, careful selection of an appropriate sheep breed is necessary for modeling endovascular cerebral venous access and assessing novel procedures.

Transcriptome sequencing for identification of the genes associated with restenosis of venous grafts in rabbits

To identify the genes associated with venous graft restenosis in rabbits using transcriptome sequencing. Forty New Zealand rabbits were randomly divided into experimental group and control group, and in the experimental group, the left external jugular veins of the rabbits were engrafted to the left common carotid artery with continuous running suture; the rabbits in the control group received no operation. At 2 and 4 weeks after the operation, 10 rabbits from each group were euthanized and the venous grafts (in experimental group) or left external jugular vein (in control group) were harvested for measurement of the intima-media thickness using HE staining. RNA high-throughput sequencing (RNA-seq) was performed to identify the differentially expressed genes (DEGs) between the venous grafts and the control veins, and the biological functions of the DEGs were analyzed using GO and KEEG databases. In the experimental group, intima-media thickening with increased extracellular matrix and vascular smooth muscle cell proliferation occurred in the venous grafts at 2 weeks and aggravated at 4 weeks after the operation. RNA high-throughput sequencing identified 1583 up-regulated genes and 608 down-regulated genes in the venous grafts in the experimental group, and GO and KEGG analysis of the DEGs pinpointed 10 hub genes, namely CD4, ZAP70, SYK, CD28, PIK3CD, CXCR4, CCR5, ITK, CCL5 and BTK. CD4, ZAP70, SYK, CD28, PIK3CD, CXCR4, CCR5, ITK, CCL5 and BTK are probably the key genes associated with vein graft restenosis in rabbits.

External jugular vein pseudoaneurysm in a 2-year-old child

External jugular vein pseudoaneurysm in a 2-year-old child

A rare variations of the cephalic vein drainage: two cases report.

Throughout the years, anatomic studies have demonstrated numerous variations in the course of the cephalic vein (CV). There are, however, very rare cases of uncommon formation, course or termination of the vein to which our attention should be drawn. During a routine dissections conducted in the Department of Anatomy and Neurobiology, in two formalin-fixed cadavers, the very rare anatomical variants were found. In 80 year-old Caucasian female the right cephalic vein, after crossing the clavipectoral triangle, ascended anterior and superior to the clavicle and drained into the lateral branch of the right external jugular vein, which in turn opened to the right subclavian vein. In the second case, the dissection of 83 year-old Caucasian male cadaver revealed that after passing through the deltopectoral groove, the left cephalic vein run between clavicle and subclavius muscle to terminate in the left subclavian vein. Understanding of the topography, morphology and anatomical variations of the cephalic vein is important not only for the anatomists but for the clinicians and nurses as well. Such knowledge can prevent multiple complications during many invasive procedures including implantation of Cardiac Implantable Electronic Devices, central venous access, arteriovenous fistula creation or even iatrogenic injuries during clavicle or glenohumeral joint surgery.

Percutaneous shunt vessel embolisation with Amplatzer vascular plugs II and IV in the treatment of dogs with splenophrenic shunts: four cases (2019-2022).

To describe the treatment of four dogs with splenophrenic shunts using percutaneous shunting vessel embolisation with Amplatzer vascular plugs II and IV and provide information on their clinical outcomes. Dogs with splenophrenic shunts treated at a veterinary hospital from January 2019 to December 2022 were identified through a medical record search. Six dogs with splenophrenic shunts were identified. Two dogs were excluded because they were treated with laparoscopic surgery. Four underwent percutaneous shunting vessel embolization with Amplatzer vascular plugs and were included in the case series. A sheath was placed in the left external jugular vein and a balloon catheter was advanced to the shunting vessel under fluoroscopy. Portal vein pressure was confirmed to be within an acceptable range during temporary balloon occlusion. Based on preoperative CT angiography and intraoperative contrast examination, Amplatzer vascular plugs II were selected for two dogs and IV were selected for two dogs. Under fluoroscopy, the plug was deployed into the shunting vessel, and angiography confirmed occlusion. In all cases, the increase in portal pressure after temporary occlusion was within the acceptable range, and complete occlusion of blood flow was possible with a single plug. There were no major procedure-related complications. No dogs developed post-ligation seizures or signs of portal hypertension. In addition, improvements in ammonia values were observed in all cases. Percutaneous splenophrenic shunt embolisation using Amplatzer vascular plugs II and IV is technically feasible in dogs, and assessed by intra-procedure angiography, a single plug completely obstructed blood flow in all dogs. Based on the literature search, this is the first report describing Amplatzer vascular plugs for the treatment of splenophrenic shunts.

Anterior condylar arteriovenous fistula mainly fed by peripheral branches of the bilateral internal maxillary arteries: illustrative case.

The main feeding artery of an anterior condylar arteriovenous fistula (AC-AVF) is the ascending pharyngeal artery and rarely the internal maxillary artery. A 58-year-old male with a history of sinusitis since adolescence presented with a 5-year history of bilateral pulsatile tinnitus and a 2-month history of right ocular symptoms. Angiography showed that the peripheral branches of the bilateral internal maxillary arteries were the main feeding arteries of the AC-AVF and that they gathered in the clivus with a relatively large shunted pouch in the left jugular tubercle. Shunt flow drained to the right external jugular vein via the right superior ophthalmic vein. A sheath was placed in the right external jugular vein, and a small distal access catheter was guided to the right superior ophthalmic vein to allow the microcatheter to reach the shunted pouch. Selective angiography of the contralateral sphenopalatine artery allowed us to confirm the gathering site of the feeding arteries and the shunted pouch and archive the complete occlusion. Selective angiography of the contralateral sphenopalatine artery may be useful to confirm the gathering site of the peripheral branches of the bilateral internal maxillary arteries in an AC-AVF.

SAT306 Comparison Of Sodium Nitroprusside And Urapidil In Laparoscopic Adrenalectomy For Pheochromocytoma

Abstract Disclosure: M.G. Rusalenko: None. E. Pispanen: None. M. Wisham: None. I. Savasteeva: None. S. Marchenko: None. D. Borovik: None. D.O. Rusalenko: None. The aim: of the study was to compare the efficacy of Sodium Nitroprusside and Urapidil in management of blood pressure in laparoscopic adrenalectomy for pheochromocytoma. Material and methods : This study includes of 58 cases of pheochromocytoma operated in the Republican Scientific and Practical Center for Radiation Medicine. The mean age of patients was 57.0 years (31 men and 27 women). For preliminary preparations, oral α1-blocker Doxazosin was used. In-operative blood pressure (BP) was recorded via intra-radial artery BP monitoring and via intra-venous BP monitoring from the external jugular vein. Fluid loading was done with colloids and crystalloids. Epidural anesthesia was given with a combination of Ropivacaine 10mg/ml-10ml and Spinal Morphine 1mg/ml-1-2ml was given between T4 - T5 for relaxation of the abdominal cavity. For anesthesia Sevoflurane was used with non-depolarizing short and medium-acting muscle relaxants (rocuronium, atracurium). In the study we included 12 patients who underwent surgery under BP control with Uradipil and 46 patients with Nitroprusside. Results: Long-term administered Doxazosin (more than 14 days) demonstrated lower BP values ​​in the starting phase of the operations (SBP 125.0[110.0; 130.0]; DBP [75.0(60.0; 80.0]) § (SBP 140.0[130.0; 150.0]; DBP [90.0(80.0; 90.0]); p&amp;lt;0.05. Statistically significant differences in BP variability from baseline to maximum values, as well as minimum values were obtained. In both groups (Nitroprusside and Urapidil), using the Wilcoxon criteria, we did not obtain significant differences in the increase in the initial blood pressure in maximum values. In contrast, in the Nitroprusside group, a statistically significant decrease in baseline blood pressure to the minimum values (SBP 90.0[75.0; 100.0]; DBP [50.0(50.0; 55.0]); p&amp;lt;0.004) was obtained, as in the Urapidil group: (SBP 130.0[ 110.0; 140.0]; DBP [80.0(60.0; 90.0]), to minimal values (SBP 95.0[90.0; 110.0]; DBP [60.0(50.0; 60.0]); p&amp;lt;0.008. Comparison of all blood pressure indicators when using Nitroprusside or Urapidil using the Mann-Whitney U test did not show statistically significant differences. However, there was a minor significance in minimum SBP values ​​(N 90.0[75.0; 100.0] § [U 95.0(90.0; 110.0]); z=-1.44; p=0.15) and DBP (N 50.0[50.0; 55.0] § [U 60.0(50.0; 60.0]); z=-1.81; p=0.07. Initial, maximum and final BP values ​​were equivalent in two groups. Conclusion: This data shows that to stabilize patient blood pressure in adrenalectomy for pheochromocytoma, preparation with α1-blockers is significant. The use of Sodium Nitroprusside and Urapidil is equally effective for managing BP during adrenalectomy, however, Urapidil shows to have advantages due to its lower side effects compared to Nitroprusside. Presentation: Saturday, June 17, 2023

Comparing in vivo wave-based elastography with ex vivo mechanical testing in porcine vessels

Arterial stiffness predicts cardiovascular disease, the leading cause of death worldwide. Ultrasound elastography methods that measure wave velocity have promise for evaluating the stiffness of blood vessels in vivo. However, vessel geometry modulates wave velocity by inducing geometric dispersion. Here, we compare Young's modulus E estimates obtained using in vivo wave velocity measurements and techniques that either do or do not consider geometry to ex vivo reference E values from mechanical testing . An acoustic radiation force was applied to generate propagating waves in the right common carotid artery (N = 9) and external jugular vein (N = 10) of anesthetized pigs. Vessels were imaged with ultrafast ultrasound to measure wave motion. Group velocity cg was estimated from wave motion using a Radon transform. E was estimated from cg using a bulk media assumption which neglects geometry, as well as the Moens–Korteweg equation and a semi-analytical finite element model, which consider geometry. Pigs were euthanized and vessels were excised. Ring-shaped samples were extracted and tested in a uniaxial tension setup to obtain reference E values for comparison with E values obtained from wave-based techniques. Techniques considering geometry exhibited higher correlation with reference E values, underscoring the need to incorporate geometry for accurate vascular elastography assessments.

Histidine-rich glycoprotein attenuates catheter thrombosis.

Factor XII (FXII) knockdown attenuates catheter thrombosis in rabbits. Because histidine-rich glycoprotein (HRG) modulates FXIIa activity, we hypothesized that HRG depletion would promote catheter thrombosis. To test this, rabbits were given either antisense oligonucleotides (ASOs) against HRG or FXII, a control ASO, or saline. The activated partial thromboplastin time (aPTT), prothrombin time (PT), and catheter-induced thrombin generation were determined in blood collected before and after treatment. Compared with the controls, the HRG- and FXII-directed ASOs reduced hepatic messenger RNA and plasma levels of HRG and FXII, respectively, by >90%. Although HRG knockdown shortened the aPTT by 2.5 fold, FXII knockdown prolonged it by fourfold; neither of the ASOs affected the PT. Catheter segments shortened the lag time and increased peak thrombin in the plasma from control rabbits; effects were significantly enhanced and attenuated in the plasma from rabbits given the HRG- and FXII-directed ASOs, respectively. Catheters were then inserted into the right external jugular vein of the rabbits, and the time for catheter occlusion was determined. The catheter occlusion times with the control ASO or saline were 62± 8minutes and 60± 11minutes, respectively. The occlusion time was significantly reduced to 34± 9minutes, with HRG knockdown and significantly prolonged to 128± 19minutes with FXII knockdown. HRG levels are decreased with sepsis or cancer, and such patients are prone to catheter thrombosis. Because HRG modulates catheter thrombosis, our findings suggest that HRG supplementation may prevent this problem.

New Noninvasive Method for the Assessment of Central Venous Oxygen Saturations in Critically Ill Patients

To compare noninvasive external jugular vein oxygen saturations (SjvO2) and central venous oxygen saturation (ScvO2) from a blood sample in patients admitted to the intensive care unit. A prospective, comparative, monocentric clinical trial design was used. The study was performed in the Department of Anaesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University Hospitals of Geneva (Switzerland). A total of 79 patients were enrolled; patients with confirmed COVID-19 infection requiring invasive mechanical ventilation (patients with COVID-19, n=36) and patients after liver transplantation (posttransplant patients, n=43). Simultaneous measurement of SjvO2 by near-infrared spectroscopy and ScvO2 from central venous blood samples using a blood gas analyzer in stable hemodynamic conditions. A strong linear correlation was evidenced in both the COVID-19 and posttransplant patient groups between the 2 modalities. The Bland-Altman analysis showed low bias in accordance with low percentage error in both groups (0.57% and 8.09% for patients with COVID-19; 0.00% and 13.72% for posttransplant patients). Central venous oxygen saturation can be estimated reasonably by the continuous noninvasive measurement of SjvO2 using near-infrared spectroscopy.