Cannula Research Articles

Cannulated prolactin test in the diagnosis of the hyperprolactinemia syndrome

Hyperprolactinemia (HP) is a persistent pathological increase in a prolactin serum concentration amounting to more than 20 ng/ml in males and 25 ng/ml in females and leads to developing the pathological symptom complex of HP primarily from the reproductive system. To confirm the persistent etiology of HP and to eliminate physiological short-term hormone enhancement, a number of recommendations, including Russian and Belarusian, were proposed to make several prolactin measurements.This study included 120 patients with HP (96 females, 78.0 %) and (27 males, 22.0 %) aged 18–50 years who sought medical help at the Health Institution “Minsk City Clinical Endocrinology Center” in the period from December 2022 to September 2023. After catheterizing the vein, a venous cannula was inserted and blood was taken immediately after cannulating (T0), and then in 60 minutes (T1) and 120 minutes (T2). The cannulated prolactin test results were considered positive – with HP remaining in all three samples (T0, T1, T2), questionable – if HP was kept at T0 and T1, and negative if HP was only at T0. When evaluating the cannulated test results, true HP is 36.7 %. Patients with a positive cannulated test had a higher prolactin at T0, which was 888.5 mME/L (U = 97.0; z = 7.92; p < 0.001). Patients with stress-induced HP (negative test) and patients with true HP (positive test) had no statistically significant differences in age and occurrence frequency of specific and non-specific complaints and symptoms for HP.

Nurses’ Practice and Knowledge of Peripheral Intravenous Cannula Flushing Pre-Therapy Administration at Medical-Surgical Wards

Nurses’ Practice and Knowledge of Peripheral Intravenous Cannula Flushing Pre-Therapy Administration at Medical-Surgical Wards

Oral fluorescein angiography in the diagnosis of paediatric optic nerve abnormalities.

FFA is a well-established investigation for the diagnosis of optic nerve abnormalities, requiring an intravenous cannula and extended imaging acquisition time. Cannulation can present a challenge in paediatric patients and whilst oral FFA has been used for decades, it has been limited by imaging technology and unconfirmed image acquisition timings. For years, we have used a modern ultra-widefield retinal camera, and established imaging time-points to demonstrate dynamic optic nerve head changes upon ingestion of fluorescein and collected a database of oFFA images for various presentations. Using an established protocol, optic nerve colour images were obtained, followed by oral administration of fluorescein dye. The optic nerves are then imaged at established intervals. An interpretation of oFFA tutorial was delivered to consultant ophthalmologists and trainees. Subsequently, these groups were assessed using a series of fifteen cases with the sensitivity and specificity of the test determined. Our study presents a series of images and descriptions for common optic nerve abnormalities in paediatric populations. In the interpretation part of the study, overall sensitivity of 76.8% in the consultant group vs 63.3% in the combined consultant + trainees and specificity of 87.5% vs 68.4% in the combined group. This is the first study that describes characteristic features of several common, and serious, optic nerve abnormalities specifically for oFFA interpretation in a paediatric population. It also highlights the rapid accumulation of oFFA interpretation skills in non-specialist consultant and trainee ophthalmologists such as to obtain a high diagnostic accuracy with high sensitivity and specificity.

Assessment of the Peripheral Venous Cannulation in a Teaching Hospital: A Prospective Study

ABSTRACT Introduction: In today’s healthcare environment, peripheral venous cannulations are frequently performed procedures. Bloodstream infections could occur as a result of the intrusive operation. Peripheral venous cannulas should be inserted and managed according to specific rules. This study compared these standards to the peripheral venous cannulation procedure and results at a teaching hospital institution. Materials and Methods: This study investigated the procedure and results of peripheral venous cannulation in a teaching center using a prospectively completed audit loop study. The “Royal College of Nursing’s criteria for infusion therapy” is one such set of recommendations. After the first phase of the observations, the audit was conducted. Later, after 4 months based on the recommendations, the personnel received training on a variety of cannulation-related topics and the second set of observations for the cannulations was performed. Both observations were made and compared for significance that was considered at. 05 using the ANOVA. Results: During the first phase of the research, 212 cannulations were made, and 314 were made for the second phase to be audited. In the reaudit compared with the initial audit, there was a statistically substantial surge in documentation, cannula cleansing, glove use, suitable site selection, and hand cleanliness, according to comparative exploration. Moreover, there was a statistically substantial decline in recannulations. Conclusion: Even though peripheral intravenous cannulation is a straightforward process, if done incorrectly, it might have serious side effects. Such techniques’ auditing reveals performance flaws. Reaudit results reveal a noticeable increase in performance and outcome following proper personnel retraining.

An initiative for better patient handling and process evolution using BD Vacutainer® UltraTouch™ Push Button Blood Collection Set with Pre-Attached Holder

Objectives: Venepuncture and intravenous cannula insertions frequently cause pain and anxiety in paediatric patients. Various studies have observed that higher gauge and shorter needles are less painful, and the likelihood of bleeding was decreased compared to the lesser gauge needles. Hence a study was designed with objective of evaluation of BD UT PBBCS – PAH (latest blood collection device) for pain perception of paediatric patients. Material and Methods: The current study was conducted at the outpatient department of Bai Jerbai Wadia Hospital for Children. In this study, 33 paediatric individuals were included. Venepuncture was performed with UTPBBCS-PAH (25G) and after the procedure feedback was collected. Pain perception feedback was gathered using a categorical scale ranging from 0 to 5, also known as the “verbal pain intensity scale”. Results: The current study found that pain intensity was significantly lower with UTPBBCS-PAH, and the overall experience was less traumatic. Conclusion: The UTPBBCS is deemed to be the appropriate blood collection device for the paediatric population due to design elements contributing to less painful experience.

A safe and effective winged peripheral intravenous cannula for use in clinical practice.

Vascular access continues to be a key factor for the reliable and safe delivery of intravenous (IV) therapy to patients in any healthcare setting. Clinical guidelines advocate for the right vascular access device selection, in order to reduce avoidable complications, eg multiple stabs, phlebitis, thrombophlebitis, insertion site infection, and blood stream infection, while improving efficiency and reducing costs. Peripheral intravenous catheters or cannulas (PIVCs) remain widely used for gaining vascular access in all clinical settings, with both adults and children, because they provide a relatively cheap and simple way to provide blood sampling and the prompt administration of IV medications. Although safe and easy to insert, PIVCs present with associated risks that can be costly to the organisation. The case studies included with this article introduce Nipro's Safetouch Cath Winged with Injection Port as a new cost-effective choice of PIVC, which is now available from NHS Supply Chain.

Percutaneous Cannulation for Minimally Invasive Cardiac Surgery: The Safest and Effective Technique for the Future.

Introduction: In recent years, contemporary minimally invasive cardiac surgery techniques have been used in many cardiac surgical clinics.
 With the expansion of minimally invasive operations, ECMO, and some interventional therapies, the current cardiac surgical landscape requires a thorough knowledge of peripheral cannulation techniques. A venous cannulation that is not flawlessly performed can lead to serious life-threatening complications in several steps. The technique we describe step by step is the current gold standard in terms of safety and efficacy: from the use of ultrasound for ultrasound-guided puncture to the safe advancement of super stiff guidewires using a sentinel catheter and concluding with smooth insertion of the venous cannula over the stiff guidewire up to the SVC. Moreover, a list of bailout maneuvers to solve complications and a report of institutional clinical experience since adopting this technique are presented.
 Conclusion: In our experience, however, the fact is that patients' perceptions and expectations have changed. Patients increasingly ask for a therapeutic approach that leaves the sternum intact. Those doctors who want to meet this new challenge must realize that minimal incisions in cardiac surgery require excellent technical skills. For this reason, doctors should become familiar with current study data.
 

P-26 Recurrent diabetic ketoacidosis-like symptoms and factitious hyperglycemia as a Munchausen syndrome in diabetes mellitus type 1: A case report

Abstract Introduction Factitious disorder (FD) is diagnosed by pretending to be sick with no abnormal examination or paraclinical study in the presence of psychiatric symptoms which also is named Munchausen's syndrome. The prevalence of the disease among hospitalized patients is approximately 9%. Clinical Case A 17-year-old girl with type 1 diabetes mellitus was referred to endocrinology clinic with uncontrolled diabetes, dizziness, abdominal pain, nausea and vomiting. She was treated with multiple daily insulin during 4 years but in last 8 months her self-monitoring of blood glucose ranges was out of control and have BG (blood glucose) different ranges of 40-560mg/dl. She was admitted to control her brittle diabetes with insulin infusion but even with high dose insulin infusion up to 20 IU/hr mostly her BS were above 400mg/dl. The notable point was that BG level was measured by laboratory was lower than glucometer. She also complained of severe abdominal pain and nausea during admission that mimics diabetic ketoacidosis in the presence of hyperglycemia despite the lack of ketonuria and metabolic acidosis. She admitted to hospital several times over the last year to control high level of BG. In psychiatric examination, she has good cooperation in response to questions. Mental Status Examination was not normal. Her mood was depressive and behavior was aggressive. Mild depressive symptoms and borderline features were seen in her Rorschach test. Finally because of high suspicion to associated psychiatric problems, to find the cause of high BG despite high insulin dose prescription, patient behaviors were monitored insensible. We found that she impregnated her finger to the date palm a few minutes before blood glucose check with glucometer devices at times when she is alone in the room. The patient had different deceptive behaviors depending on the method of treatment. But the answer to the question of why the patient was not suffering from hypoglycemia despite high doses of insulin injection is, when insulin infusion by pump was started to control high BG, intravenous cannula secretly separated from insulin infusion set and insulin thrown away. Also she secretly eats fruit juice and jam to prevent hypoglycemic attack for high-dose insulin injection. She took the water into the insulin pen instead of insulin and injected so that the nurses did not notice. Frauds were changed by switching the treatment methods. HbA1c was requested last week of hospitalization which shows 8%. Although all BGwas above 300 mg/dl during this prolonged hospitalization, it did not match with chronic hyperglycemia. Conclusion The main purpose of this article was in relation to a diabetic patient with brittle diabetes, difficulty in control BG level, discrepancies between patient symptoms and sings, factitious disorder or Munchausen syndrome should always be in our mind.

Integrated short peripheral intravenous cannulas and risk of catheter failure: A systematic review and meta-analysis.

Short peripheral catheters (SPCs) are used to provide intravenous therapies in hospitalized patients. Recently, the category of SPC has become more complex, with the introduction in clinical practice of "integrated" SPCs (ISPCs), renewed regarding the material (polyurethane rather than polytetrafluoroethylene) and design (large wing; pre-assembled extension; preassembled needle-free connector (NFC)). This systematic review and meta-analysis aimed to analyze randomized controlled trials (RCTs) and quasi-randomized studies in hospitalized patients, analyzing the risk of overall catheter failure as well as the risk of each type of complication (occlusion, infiltration, thrombophlebitis, and dislodgement) for ISPCs compared to non-integrated SPCs. These systematic review and meta-analysis were registered on PROSPERO (CRD42022322970). We searched PUBMED®, EMBASE®, and the Cochrane Controlled Clinical Trials register from April to November 2022. The research identified 1260 articles. After the abstract review, 13 studies were included for full manuscript review and, after that, six papers (4727 patients) were included in the meta-analysis. We found a significantly reduced risk of catheter failure (pooling all complications) for ISPCs compared to SPCs (p = 0.002 RR 0.65; 95% CI 0.63-0.9). A significant reduction in the risks of occlusion (p = 0.007 RR 0.72; 95% CI 0.56-0.92) was observed. As regards the risk of infiltration, thrombophlebitis, and dislodgement, the analysis showed a trend in favor of ISPCs, though not statistically significant (respectively p = 0.2 RR 0.84; 95% CI 0.64-1.1; p = 0.25 RR 0.91; 95% CI 0.78-1.07; p = 0.06 RR 0.72; 95% CI 0.52-1.01). ISPCs significantly reduce the risks of catheter failure (overall complications) and occlusion. More RCTs are needed to understand if the preassembled ISPC is better than the composted closed system (non-integrated SPC + extension line + NFC).

A Novel Approach for Simultaneous Venoarterial Extracorporeal Membrane Oxygenation and Left Ventricular Decompression Therapy With Impella (ECPella)

Percutaneously placed veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is commonly used to support patients with refractory cardiac arrhythmias or arrest and worsening cardiogenic shock (CS). Peripheral VA-ECMO by retrograde flow of blood in the aorta results in a significant increase in left ventricle (LV) afterload. A severely dysfunctional LV may be unable to overcome this afterload to open the aortic valve and unload itself. This may lead to LV distension, increased left ventricular pressure, poor coronary blood circulation, increased left atrial pressures, pulmonary edema, and pulmonary hypertension. Moreover, it jeopardizes ventricular recovery, particularly in the presence of ischemia-induced myocardial impairment. Furthermore, if the aortic valve remains closed during the cardiac cycle, stasis of blood in the LV and aortic root may increase the risk of thrombus formation. These complications may preclude cardiac recovery and the patient from being a heart transplant candidate. In patients with CS, utilizing Impella with VA-ECMO, commonly referred to as ECPella, has consistently been shown to reduce mortality and improve outcomes. Patients who need prolonged ECPella support as a bridge to recovery or transplant may remain bed-bound since ambulation of patients with two mechanical circulatory support devices is challenging. We present the technique of ECPella placement through Y chimney graft anastomosis on the axillary artery for arterial cannula and Impella insertion and percutaneous cannulation of the right internal Jugular vein for venous cannula. This technique gives the ease of ambulation and decannulation of VA-ECMO under local anesthesia without requiring intubation or a trip to the operating room.

Prospective observational study of peripheral intravenous cannula utilisation and frequency of intravenous fluid delivery in the emergency department-Convenience or necessity?

Peripheral Intravenous Cannulas (PIVCs) are frequently utilised in the Emergency Department (ED) for delivery of medication and phlebotomy. They are associated with complications and have an associated cost to departmental resources. A growing body of international research suggests many of the PIVCs inserted in the ED are unnecessary. The objective of this study was to determine the rates of PIVC insertion and use. This was a prospective observational study conducted in one UK ED and one Italian ED. Adult ED patients with non-immediate triage categories were included over a period of three weeks in the UK ED in August 2016 and two weeks in the Italian ED in March and August 2017. Episodes of PIVC insertion and data on PIVC utilisation in adults were recorded. PIVC use was classified as necessary, unnecessary or unused. The proportion of unnecessary and unused PIVCs was calculated. PIVCs were defined as unnecessary if they were either used for phlebotomy only, or solely for IV fluids in patients that could have potentially been hydrated orally (determined against a priori defined criteria). PIVC classified as unused were not used for any purpose. A total of 1,618 patients were included amongst which 977 PIVCs were inserted. Of the 977 PIVCs, 413 (42%) were necessary, 536 (55%) were unnecessary, and 28 (3%) were unused. Of the unnecessary PIVCs, 473 (48%) were used solely for phlebotomy and 63 (6%) were used for IV fluids in patients that could drink. More than half of PIVCs placed in the ED were unnecessary in this study. This suggests that clinical decision making about the benefits and risks of PIVC insertion is not being performed on an individual basis.

The burden and prognostic significance of suspected sepsis in the prehospital setting: A state-wide population-based cohort study.

Despite high in-hospital mortality, the epidemiology of prehospital suspected sepsis presentations is not well described. This retrospective cohort study aimed to quantify the burden of such presentations, and to determine whether such a diagnosis was independently associated with longer-term mortality. Retrospective, observational population-based cohort study examining all adult prehospital presentations in Victoria, between January 2015 and June 2019, who required subsequent in-hospital assessment. Linked data were extracted from clinical and administrative datasets. Demographics, illness severity, prehospital treatment and mortality were compared between prehospital suspected sepsis and non-sepsis patients. Multivariable logistic regression was used to determine the adjusted association between prehospital assessment (suspected sepsis vs non-sepsis) and 6-month mortality. A total of 1 218 047 patients were included. The age-adjusted incidence rate of prehospital suspected sepsis was 65 cases per 100 000 person-years. Those with prehospital suspected sepsis were older (74 vs 62 years), more frequently male (55% vs 47%), with greater physiological derangement. Intravenous cannulas were more often inserted prehospital (60% vs 29%). Crude in-hospital mortality was 6.5-fold higher in the prehospital suspected sepsis group (11.8% vs 1.8%), and by 6 months, 22.6% had died. After adjustment for demographics, illness severity, comorbidity, treatment and hospital location, a diagnosis of prehospital suspected sepsis was associated with a 35% higher likelihood of 6-month mortality (OR 1.35, 95% CI 1.29-1.41). The burden of prehospital suspected sepsis in the Australian setting is significant, with paramedics identifying patients at high-risk of poor longer-term outcomes. This implies the need to consider improved care pathways for this highly vulnerable group.

A Study to Assess The effectiveness of Hot Application on Prevention of Thrombophlebitis among patients with a Peripheral Intravenous Cannula admitted in selected hospitals of Mehsana

Introduction: Thrombophlebitis occurs when a blood clot causes inflammation in one or more of the veins near the surface of the skin. Damage to a vein can occur as a consequence of indwelling catheters, trauma or the infection of the irritating substances. Objectives: 1. To assess the occurrence of thrombophlebitis among patients with a peripheral intravenous cannula by using modified thrombophlebitis scale in experimental and control group. 2. To assess the effectiveness of hot application on experimental group. 3. To compare the occurrence of thrombophlebitis among patients with an intravenous cannula in experimental and control group. 4. To find out the association between the occurrence of thrombophlebitis with their selected demographic variables. Hypothesis: H0: There will be no significant difference in the occurrence of thrombophlebitis among patients with a peripheral intravenous cannula in experimental group and control group. H1: There will be a significant difference in the occurrence of thrombophlebitis among patients with a peripheral intravenous cannula in experimental group and control group. Design: A quantitative approach using quasi experimental two group post test. Participants: 30 patient in experimental group and 30 patients in control group were selected using Non-Probability convenient sampling technique. Tool: standardized phlebitis scale for using the assess thrombophlebitis among patients with peripheral IV cannula. Results: The mean score of experimental group patients 0.46 was less than control group patients 2.83 and ‘t’ test show that there was a significant difference in the occurrence of thrombophlebitis (‘t’=8.43, p>0.05) between experimental group and control group. Conclusion: From the above findings, it evident that hot application is effective on prevention of thrombophlebitis among patients with peripheral IV cannula.

Poke Plan: An Initiative to Improve Distraction and Pain Mitigation With Venous Access in Hospitalized Children.

Adequate pain control and anxiety relief during peripheral intravenous cannula (PIV) placement improves patient, parental, and staff satisfaction and reduces health care-induced stress in children. We noted a low rate of analgesic/anxiolysis use (<20%) and child life utilization (3%) in our institution. This quality improvement project was initiated to increase pain mitigation strategies in hospitalized children requiring PIV access. From November 2020 to March 2021, we created a key driver diagram and summarized possible interventions with the aim to increase our use of pain control strategies to >40% and child life utilization to 25%. For 12 months, 8 Plan-Do-Study-Act cycles were conducted focusing on nursing education and training, improved documentation, electronic medical record optimization, easy access to analgesics and anxiolytics, family involvement, and weekly huddles. Our primary measure was the percentage use of pain medications for PIV access. The utilization of PIV experts from the ICU (advanced practice registered nurses and physicians) served as the balancing measure. A total of 883 patient charts were reviewed. The use of topical anesthetics and anxiolytics increased from 16.2% at baseline to 78.9% after the implementation of the quality improvement project. Eighty percent of parents reported their child was kept comfortable during the procedure using pain mitigation and comfort measures. A slight increase from 2% to 5.8% was noted in the utilization of advanced practice registered nurses and intensivists. Implementation of a standardized approach for PIV placement improved team communication and provided better preparation for pain control before needle insertions in hospitalized children.

Biofilm Assessment and Metagenomic Analysis of Venoarterial Extracorporeal Membrane Oxygenation Cannulas and Membrane Oxygenators.

Venoarterial extracorporeal membrane oxygenation (VA-ECMO) exposes the patient to infectious complications related to the cannulas or the site of insertion. The aim of the current study was to investigate and compare the prevalence of cannula and membrane oxygenators colonization using three different methods: microbiological culture, scanning electron microscopy, and metagenomic (rRNA 16S analysis). A monocentric prospective study was conducted between December 2017 and June 2018. Consecutive patients undergoing VA-ECMO support for refractory cardiac arrest or cardiogenic shock were included. Ten patients were included with a median age of 64 (52-62) years. Venoarterial extracorporeal membrane oxygenation was inserted for refractory cardiac arrest in five (50%), cardiogenic shock in four (40%), and self-poisoning in one (10%) cases. Microbiological culture of all (8/8, 100%) membrane oxygenators was negative, whereas all (10/10, 100%) were colonized by biofilm, and eight (8/9, 89%) presented bacterial DNA. Three (3/9, 33%) arterial and venous cannulas were positive in culture and seven (7/9, 78%) were colonized by biofilm, respectively. Seven (7/9, 78%) arterial and four (4/9, 44%) venous cannulas presented bacterial DNA. Colonization of cannulas and membranes is more frequent when assessed by electron microscopy or metagenomic analysis than with culture. Membrane oxygenators are more often colonized than cannulas.

Veno-arterial extracorporeal membrane oxygenation for cardiogenic shock: one-year outcomes from a cardiac intensive care unit led shock team program

Abstract Background Mechanical circulatory support (MCS) with peripheral veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is increasingly used for severe cardiogenic shock (CS). Purpose To describe the initial experience with peripheral VA-ECMO within a cardiac intensivist team led program. Methods Retrospective analysis of a short-term MCS prospective registry, from 1 September 2021 to 1 December 2022. Clinical and device related variables were reviewed and reported. We assessed both patient outcomes as well as ECMO-related complications. Results A total of 21 patients were included in this analysis (50 ± 13 years-old, 80% male), ranging from SCAI-C (n = 8) to E (n = 5) and with a median predicted mortality by SAVE score of -4 points [IQ -6 - 0] (corresponding to 30% in-hospital survival). All cannulations were done percutaneously, mostly by trained cardiac intensivists and while at the CICU (n = 12). A femoro-femoral configuration was used for all patients. One patient was cannulated at the referring hospital and retrieved to our unit for further care. Three patients were cannulated during intra-hospital cardiac arrest and one patient was cannulated while breathing spontaneously (awake-ECMO). Mean venous and arterial cannula sizes were 22 ± 1.9 Fr and 17 ± 1.6 Fr, respectively. A 7 French (Fr) arterial limb reperfusion cannula was used in 85% of cases. The most frequent etiology was acute decompensation of chronic heart failure (n = 7), followed by acute myocardial infarction related CS (n = 5), fulminant myocarditis (n = 2) and massive pulmonary thromboembolism (n = 2). A left ventricle venting device was used in 70% of patients [intra-aortic balloon pump (n = 10); percutaneous microaxial pump ( n = 2)] and upgrade to a veno-arterio-venous configuration was necessary in one patient due to differential hypoxemia. Mean ECMO-run duration was 8.4 ± 4.8 days while mean CICU length of stay was 22 ± 17.9 In-hospital mortality was 40%. In survivors, decannulation was surgical in all but one patient. The most frequent strategy was bridge to recovery (n = 14). One patient was bridged directly to heart transplant, one to a temporary centrifugal left ventricular assist device (LVAD) and one to a durable magnetically levitated LVAD. Complications were common and included bleeding from cannula insertion sites (n = 19), renal replacement therapy requirement (n= 10), Harlequin syndrome (n = 2), cardiac tamponade (n = 2), intestinal ischemia (n = 3) and limb ischemia (n = 2). Conclusion VA-ECMO performed by cardiac intensivists is a feasible MCS strategy for severe cardiogenic shock patients in whom mortality, while high, was similar to large international published series. Further experience will allow for improvement in patient selection and minimization of device related complications.ECMO VA 1 year single-center experience

Improving the longevity of intravenous cannulas in sick neonates admitted to NICU in a tertiary care centre: a quality improvement project

BackgroundNeonatal intravenous cannulation, especially in preterms, is more challenging than in children or adults. Placement of an intravenous cannula is painful and many cannulas need frequent changing due to complications....

Time to Develop Phlebitis and Its Predictors Among Patients with Peripheral Intravenous Cannula at Public Hospitals of Bahir Dar City, Amhara, Ethiopia, 2022: A Prospective Observational Study

Time to Develop Phlebitis and Its Predictors Among Patients with Peripheral Intravenous Cannula at Public Hospitals of Bahir Dar City, Amhara, Ethiopia, 2022: A Prospective Observational Study

Dynamic Aortic Pressure Augmentation as a Novel Method of Swine Terminal Blood Extraction

IntroductionUncontrolled hemorrhage models require sufficient quantities of donor blood products to support resuscitation. To that end, we describe a novel method of whole blood extraction from donor swine using resuscitative endovascular balloon occlusion of the aorta (REBOA) to support hemodynamics during terminal blood extraction and its impact on the quality of banked blood. MethodsTen adult Yorkshire-cross swine were anesthetized and instrumented with an REBOA catheter, femoral multistage venous cannula, and proximal/distal blood pressure monitoring. Hemodynamics during terminal blood extraction was supported with hand-titrated partial REBOA. Blood samples were taken at set time points for analysis. ResultsThe median collected blood volume was 3912 mL, with all animals surviving through the planned blood collection of 60% estimated total blood volume (ETBV). Median lactate and potassium levels remained within normal limits for swine through collection of 40% of the ETBV. Median hemoglobin through collection of 40% ETBV did not significantly change from values measured at the start of hemorrhage. ConclusionsThis method of whole blood extraction provided sufficient blood volume and blood quality appropriate for transfusion through 40% ETBV, with remaining collected blood likely still acceptable for allogeneic transfusion despite increased lactate levels. This method of whole blood extraction can efficiently provide a large volume of quality blood to support resuscitation for subsequent uncontrolled hemorrhage models.

Modified Intravenous Cannula Ventilation Tubes for Otic Barotrauma Prevention.

Objectives: Middle ear barotrauma is a common complication of hyperbaric oxygen therapy (HBOT). Tympanostomy tube placement prevents barotrauma by facilitating middle ear equalization. We describe variations on techniques published by Mooney et al and Zhang et al for placing modified peripheral intravenous cannula (PIVC) ventilation tubes, which can be performed at the bedside under topical anesthesia. We aim to evaluate the safety and efficacy of this technique when performed to prevent otic barotrauma in patients undergoing HBOT. Methods: We performed an analytical observational study at a tertiary metropolitan Australian hospital with a state-wide adult hyperbaric service between 2018 and 2022. Patients were identified via unit audits. Patient, HBOT, and procedural factors were analyzed against complications using Fisher's exact test with Bonferroni correction and simple logistic regression. Results: Over 4 years, 112 patients (220 ears) underwent modified PIVC ventilation tube insertion. Mean age was 58.6 years (95% CI: 55.7-61.6, SD: 15.9). Thirty-eight patients (33.9%) were female, 74 (66.1%) were male. Thirty-four ears (15.5%) had preexisting barotrauma at the time of tympanostomy tube insertion. Patients underwent a mean of 11.5 dives (95% CI: 9.0-14.0, SD: 13.4), with ventilation tubes being required for a mean of 15.0 days (95% CI: 9.0-14.0, SD: 24.0) to complete HBOT. Fourteen ventilation tubes (6.4%) developed blockage during HBOT, and 12 (5.5%) prematurely extruded. Sixteen ears (7.3%) required reinsertion of ventilation tubes. Nine ears (4.1%) suffered barotrauma despite ventilation tube insertion. Conclusions: Otic barotrauma prophylaxis is paramount for safety during HBOT. We describe a safe, effective, and convenient technique for barotrauma prevention using modified PIVCs.