The role of viscoelastic hemostatic assays for postpartum hemorrhage management and bedside intrapartum care.

Viscoelastic hemostatic assays are point-of-care devices that assess coagulation and fibrinolysis in whole blood samples. These technologies provide numeric and visual information of clot initiation, clot strength, and clot lysis under low-shear conditions, and have been used in a variety of clinical settings and subpopulations, including trauma, cardiac surgery, and obstetrics. Emerging data indicate that these devices are useful for detecting important coagulation defects during major postpartum hemorrhage (especially low plasma fibrinogen concentration [hypofibrinogenemia]) and informing clinical decision-making for blood product use. Data from observational studies suggest that, compared with traditional formulaic approaches to transfusion management, targeted or goal-directed transfusion approaches using data from viscoelastic hemostatic assays are associated with reduced hemorrhage-related morbidity and lower blood product requirement. Viscoelastic hemostatic assays can also be used to identify and treat coagulation defects in patients with inherited or acquired coagulation disorders, such as factor XI deficiency or immune-mediated thrombocytopenia, and to assess hemostatic profiles of patients prescribed anticoagulant medications to mitigate the risk of epidural hematoma after neuraxial anesthesia and postpartum hemorrhage after delivery.

Influence of semaglutide use on the presence of residual gastric solids on gastric ultrasound: a prospective observational study in volunteers without obesity recently started on semaglutide.

PURPOSE: Glucagon-like peptide-1 (GLP-1) receptor agonists (GLP-1RAs) have become increasingly popular as both diabetic and weight loss therapies. One effect of this class of medication is delayed gastric emptying, which may impact the risk of aspiration during anesthesia delivery. METHODS: In this prospective study, we used gastric ultrasound to evaluate the presence of solid gastric contents in both supine and lateral positions after an eight-hour fast in those taking GLP-1RA compared with controls. Participants underwent a second ultrasound evaluation two hours later after drinking 12 fluid ounces of water (approximately 350 mL). RESULTS: Twenty adults voluntarily enrolled, giving a total of ten participants in each group. In the supine position, 70% of semaglutide participants and 10% of control participants had solids present on gastric ultrasound (risk ratio [RR], 3.50; 95% confidence interval [CI], 1.26 to 9.65; P = 0.02.) In the lateral position, 90% of semaglutide participants and 20% of control participants had solids identified on gastric ultrasound (RR, 7.36; 95% CI, 1.13 to 47.7; P = 0.005). Two hours after drinking clear liquids, the two groups did not differ in the lateral position, but in the supine position, 90% of control group participants were rated as empty compared with only 30% of semaglutide group participants (P = 0.02). CONCLUSIONS: This study provides preliminary evidence that GLP-1RAs may affect gastric emptying and residual gastric contents following an overnight fast and two hours after clear liquids, which may have implications for aspiration risk during anesthetic care.

RéSUMé: OBJECTIF: Les agonistes des récepteurs du peptide-1 de type glucagon (GLP-1) (AR-GLP-1) sont de plus en plus populaires comme traitements du diabète et pour la perte de poids. L'un des effets de cette classe de médicaments est le retard de la vidange gastrique, ce qui peut avoir un impact sur le risque d'aspiration pendant l'administration de l'anesthésie. MéTHODE: Dans cette étude prospective, nous avons utilisé l'échographie gastrique pour évaluer la présence de contenu gastrique solide en décubitus dorsal et latéral après un jeûne de huit heures chez les personnes prenant des AR-GLP-1 par rapport à un groupe témoin. Les participant·es ont passé une deuxième échographie deux heures plus tard, après avoir bu 12 onces liquides d'eau (environ 350 mL). RéSULTATS: Vingt personnes adultes se sont inscrites volontairement, soit un total de dix participant·es dans chaque groupe. En décubitus dorsal, 70 % des personnes du groupe sémaglutide et 10 % des personnes du groupe témoin présentaient des solides à l'échographie gastrique (risque relatif [RR], 3,50; intervalle de confiance [IC] à 95 %, 1,26 à 9,65; P = 0,02). En décubitus latéral, 90 % des personnes du groupe sémaglutide et 20 % des personnes du groupe témoin présentaient des solides à l'échographie gastrique (RR, 7,36; IC 95 %, 1,13 à 47,7; P = 0,005). Deux heures après avoir bu des liquides clairs, le contenu gastrique évalué ne différait pas entre les deux groupes en position latérale, mais en décubitus dorsal, l'estomac de 90 % des participant·es du groupe témoin a été jugé vide, comparativement à seulement 30 % chez les participant·es du groupe sémaglutide (P = 0,02). CONCLUSION: Cette étude procure des données préliminaires selon lesquelles les AR-GLP-1 pourraient affecter la vidange gastrique et le contenu gastrique résiduel après un jeûne d'une nuit et deux heures après l'ingestion de liquides clairs, ce qui pourrait avoir des implications quant au risque d'aspiration pendant les soins anesthésiques.

The Mount Sinai Hospital Institute for critical care medicine response to the COVID-19 pandemic.

BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic resulted in a surge of critically ill patients. This was especially true in New York City. We present a roadmap for hospitals and healthcare systems to prepare for a Pandemic. METHODS: This was a retrospective review of how Mount Sinai Hospital (MSH) was able to rapidly prepare to handle the pandemic. MSH, the largest academic hospital within the Mount Sinai Health System, rapidly expanded the intensive care unit (ICU) bed capacity, including creating new ICU beds, expanded the workforce, and created guidelines. RESULTS: MSH a 1,139-bed quaternary care academic referral hospital with 104 ICU beds expanded to 1,453 beds (27.5% increase) with 235 ICU beds (126% increase) during the pandemic peak in the first week of April 2020. From March to June 2020, with follow-up through October 2020, MSH admitted 2,591 COVID-19-positive patients, 614 to ICUs. Most admitted patients received noninvasive support including a non-rebreather mask, high flow nasal cannula, and noninvasive positive pressure ventilation. Among ICU patients, 68.4% (n=420) received mechanical ventilation; among the admitted ICU patients, 42.8% (n=263) died, and 47.8% (n=294) were discharged alive. CONCLUSIONS: Flexible bed management initiatives; teamwork across multiple disciplines; and development and implementation of guidelines were critical accommodating the surge of critically ill patients. Non-ICU services and staff were deployed to augment the critical care work force and open new critical care units. This approach to rapidly expand bed availability and staffing across the system helped provide the best care for the patients and saved lives.

Monitoring of COVID-19-Associated Coagulopathy and Anticoagulation with Thromboelastometry.

INTRODUCTION: Thrombosis occurs frequently in COVID-19. While the exact mechanism is unclear, 3 processes seem to play important roles in sepsis-related thrombosis and mortality: tissue factor expression on circulating monocytes and microparticles, hypercoagulability (increased clot firmness), and hypofibrinolysis. Rotational thromboelastometry is a point-of-care viscoelastic technique that uses the viscoelastic properties of blood to monitor coagulation. Using various assays, viscoelastometry could monitor this triad of changes in severely ill, COVID-19-positive patients. Similarly, with the increased incidence of coagulopathy, many patients are placed on anticoagulants, making management more difficult depending on the agents utilized. Viscoelastometry might also be used in these settings to monitor anticoagulation status and guide therapy, as it has in other areas. CASE PRESENTATION: We present a case series of 6 patients with different stages of disease and different management plans. These cases occurred at the height of the pandemic in New York City, which limited testing abilities. We first discuss the idea of using the NaHEPTEM test as a marker of tissue factor expression in COVID-19. We then present cases where patients are on different anticoagulants and review how viscoelastometry might be used in a patient on anticoagulation with COVID-19. CONCLUSION: In a disease such as COVID-19, which has profound effects on hemostasis and coagulation, viscoelastometry may aid in patient triage, disease course monitoring, and anticoagulation management.

Managing COVID-19 from the epicenter: adaptations and suggestions based on experience.

In March 2020, the New York City metropolitan area became the epicenter of the United States' SARS-CoV-2 pandemic and the surge of new cases threatened to overwhelm the area's hospital systems. This article describes how an anesthesiology department at a large urban academic hospital rapidly adapted and deployed to meet the threat head-on. Topics included are preparatory efforts, development of a team-based staffing model, and a new strategy for resource management. While still maintaining a fully functioning operating theater, discrete teams were deployed to both COVID-19 and non-COVID-19 intensive care units, rapid response/airway management team, the difficult airway response team, and labor and delivery. Additional topics include the creation of a temporary 'pop-up' anesthesiology-run COVID-19 intensive care unit utilizing anesthesia machines for monitoring and ventilatory support as well as the development of a simulation and innovation team that was instrumental in the rapid prototyping of a controlled split-ventilation system and conversion of readily available BIPAP units into emergency ventilators. As the course of the disease is uncertain, the goal of this article is to assist others in preparation for what may come next with COVID-19 as well as potential future pandemics.

Point-of-Care Fibrinogen Testing in Pregnancy.

Agreement between estimated fibrinogen concentration via thromboelastography and traditional assays is not established in the parturient. We therefore recruited 56 parturients and performed Clauss and functional fibrinogen level (FLEV) tests. Mean difference of measurements was 36.8 mg/dL (95% CI, 21.8-51.9) with a standard deviation of 52.8 mg/dL. Calculated limits of agreement were 140.2 mg/dL (95% CI, 166.3-114.6) and -66.6 mg/dL (95% CI, -40.8 to -92.5), within the maximum allowable difference of 165 mg/dL. We therefore conclude that while most measurements fell within the limits of agreement, more work is needed to clearly define the role of this test in the obstetric population.

The Effect of Adding Subarachnoid Epinephrine to Hyperbaric Bupivacaine and Morphine for Repeat Cesarean Delivery: A Double-Blind Prospective Randomized Control Trial.

BACKGROUND: Spinal anesthesia has become the most common type of anesthetic for cesarean delivery. The major limitation to spinal anesthesia is that the duration of the anesthetic may not be adequate in the event of a prolonged surgery. Some practitioners add epinephrine to hyperbaric bupivacaine to increase the duration, although its effect has not been fully studied. We therefore aimed to evaluate whether adding epinephrine to the spinal medication prolongs the duration of action of the resultant block in women presenting for repeat cesarean delivery. METHODS: Sixty-eight patients were randomized to receive no epinephrine (NE group), epinephrine 100 µg (low-dose [LD] group), or epinephrine 200 µg (high-dose [HD] group) with a standardized spinal mixture (1.5 mL 0.75% hyperbaric bupivacaine with 0.25 mg morphine). Sixty-five patients were included for primary analysis. Our primary outcome was time to intraoperative activation of the epidural catheter or postoperative regression of sensory blockade to T-10 dermatome level as measured by pinprick sensation; motor recovery was a secondary outcome, and graded via a Modified Bromage scale. RESULTS: Block onset time, vital sign changes, and the incidence of hypotension; nausea, and vomiting were similar among groups. Median difference in time to T-10 regression was greatest in the HD group compared to the NE group (median difference [min] [95% confidence interval]: 40 [15-60]; P = .007), followed by the HD group to the LD group (30 [15-45]; P = .007). Comparisons of LD to NE were not significant, but trended to an increase in T-10 regression time (10 [-15 to 30]; P = .76). Median difference in time to knee extension (Bromage 3) was also greatest in the HD group when compared to both the LD and NE group (median difference [min] [95% confidence interval]: 30 [0-60]; P = .034, 60 [0-93]; P = .007). Median difference time to knee extension (min) between the LD and NE group was also significant (37.5 [15-60]; P = .001]. Pain scores during the procedure were higher in the NE group (median [interquartile range] HD: 0 [0-0], LD: 0 [0-0], NE: 0 [0-3]; P = .02) during uterine closure and were otherwise not significantly different from the other groups. CONCLUSIONS: In this single center, prospective, double-blind, randomized control trial, the addition of epinephrine 200 µg to hyperbaric bupivacaine and preservative-free morphine for repeat cesarean delivery prolonged the duration of the sensory blockade. Motor blockade was similarly prolonged and block quality may have been enhanced.

A patient who received clopidogrel with an indwelling epidural catheter.

A patient with a drug-eluting stent placed 18 months earlier received a thoracic epidural for perioperative analgesic control as part of her thoracotomy. Postoperatively, the patient was started on clopidogrel for secondary prevention. After consultation with the Hematology service and a platelet function assay, the patient was transfused two pools of platelets and the epidural catheter was removed on postoperative day 4. The patient then underwent hourly neurologic checks for 24 hours and was discharged several days later without any negative sequelae. If neuraxial techniques and the need for clopidogrel prophylaxis come into direct conflict, vigilance is necessary for warning signs of epidural hematoma and platelet transfusion should be considered to reverse the effects of the drug.

Cardiac tamponade after transcatheter aortic valve replacement using a transaortic approach.

Transcatheter aortic valve replacement (TAVR) is considered an option for patients with severe aortic stenosis who are not surgical candidates. We describe the case of a patient who presented with cardiac tamponade shortly after uneventful TAVR by a direct aortic approach. The patient was brought to the operating room for exploration and repair. Although TAVR is less invasive than traditional open aortic valve replacement, TAVR nonetheless poses serious risk. This case highlights a potential complication of the less commonly used transaortic approach for TAVR and the importance of taking a multidisciplinary approach when identifying and managing all TAVR-associated complications.