Successful blood transfusion in a Holstein cow experiencing hemorrhagic shock under general anesthesia.

A 2-year-old Holstein cow weighing 530 kg at 2 mo gestation was scheduled for a paracostal laparotomy and abomasotomy following diagnosis of a reticular foreign body causing obstruction and abomasal impaction. Hemorrhagic shock occurred during surgery, with a rapid, approximately 60% decrease in arterial blood pressure, and reflex tachycardia with a 2-fold increase in heart rate. Following identification of hemorrhagic shock, arterial blood pressure was supported by reducing the inhalant anesthetic requirement, positive inotropic support (IV dobutamine infusion), and IV fluid therapy. Hypertonic saline was administered IV for initial resuscitation of arterial blood pressure, followed by a whole blood transfusion to replenish red blood cells, support oxygencarrying capacity, and provide intravascular volume to maintain cardiac output and tissue perfusion. A gradual increase in arterial blood pressure and a decrease in heart rate were observed in response to treatment. This case report demonstrates the physiologic compensatory response to hemorrhagic shock and the treatment to stabilize cardiovascular parameters in an anesthetized cow. Key clinical message: This case illustrates the physiological reponses to acute hemorrhage under general anesthesia and the effects of various treatment interventions.

Transfusion sanguine réussie chez une vache Holstein en état de choc hémorragique sous anesthésie générale. Une vache Holstein de 2 ans pesant 530 kg à 2 mois de gestation devait subir une laparotomie paracostale et une abomasotomie à la suite du diagnostic d'un corps étranger réticulaire provoquant une obstruction et une impaction abomasale. Un choc hémorragique est survenu pendant la chirurgie, avec une diminution rapide d'environ 60 % de la pression artérielle et une tachycardie réflexe avec une augmentation du double de la fréquence cardiaque. À la suite de l'identification d'un choc hémorragique, la pression artérielle a été soutenue en réduisant le besoin d'anesthésique inhalé, un soutien inotrope positif (perfusion de dobutamine IV) et une thérapie avec des fluides IV. Une solution saline hypertonique a été administrée par voie intraveineuse pour la restauration initiale de la pression artérielle, suivie d'une transfusion de sang total pour rétablir la quantité de globules rouges, soutenir la capacité de transport d'oxygène et fournir un volume intravasculaire pour maintenir le débit cardiaque et la perfusion tissulaire. Une augmentation progressive de la pression artérielle et une diminution de la fréquence cardiaque ont été observées en réponse au traitement. Ce rapport de cas démontre la réponse physiologique compensatoire au choc hémorragique et le traitement pour stabiliser les paramètres cardiovasculaires chez une vache anesthésiée.Message clinique clé :Ce cas illustre les réponses physiologiques à une hémorragie aiguë sous anesthésie générale et les effets de diverses interventions thérapeutiques.(Traduit par Dr Serge Messier).

Teleconsulting in the time of a global pandemic: Application to anesthesia and technological considerations.

As a result of the various restrictions associated with the current COVID-19 pandemic, the practice of veterinary telehealth is likely to grow substantially. One area in which high quality care can be maintained while respecting physical distancing is teleconsulting, which describes the relationship between an attending and off-site consulting veterinarian. This guide uses a dentistry case to illustrate the provision of real-time anesthesia consulting, with a focus on the technological considerations central to facilitating live, 2-way video-communication. Case selection, teamwork, and patient safety are also discussed.

Téléconsultation en temps de pandémie globale : application à l'anesthésie et considérations technologiques. Comme résultats des différentes restrictions associées à la présente pandémie de COVID-19, la pratique de télésanté vétérinaire est appelée à croître considérablement. Un domaine dans lequel des soins de haute qualité peuvent être maintenus tout en respectant la distanciation physique est la téléconsultation, qui décrit la relation entre un vétérinaire traitant et un vétérinaire consultant hors-site. Ce guide utilise un cas de dentisterie pour illustrer les exigences de consultation en temps réel pour l'anesthésie, avec une emphase sur les considérations technologiques essentielles pour faciliter une communication vidéo bidirectionnelle en direct. La sélection de cas, le travail d'équipe et la sécurité du patient sont également discutés.(Traduit par Dr Serge Messier).

ANESTHESIA OF AQUARIUM-HOUSED WALRUS ( ODOBENUS ROSMARUS): A CASE SERIES.

Walruses are a challenging species to anesthetize as a result of their large mass, limited access for drug delivery, unique physiology, and small number of reports describing anesthetic procedures. Three aquarium-housed walruses ( Odobenus rosmarus) ranging in age from 3 to 11 yr old (344-1,000 kg) were anesthetized for dental or ophthalmic surgical procedures, with one animal anesthetized twice and one anesthetized three times. Preanesthetic medication was with intramuscular midazolam (0.1-0.2 mg/kg) and meperidine (2-3 mg/kg). A catheter was placed in the extradural intravertebral vein, and anesthesia was induced with propofol to effect. Orotracheal intubation was performed and anesthesia maintained with isoflurane in oxygen using a circle breathing system connected to a ventilator. Intermittent positive pressure ventilation was used in all procedures. For the ophthalmic surgery, the neuromuscular blocking agent, cisatracurium, was given intravenously to provide a central eye and optimal surgical conditions. The neuromuscular block was antagonized with edrophonium. Total anesthesia times ranged from 1.5 to 6 hr. Midazolam and meperidine were antagonized with flumazenil and naltrexone, respectively, in five of six cases. Nonsteroidal anti-inflammatory agents were provided for analgesia. Recoveries were calm and uneventful. The described anesthetic protocols and case management were successful under the conditions encountered.

Cardiopulmonary Effects of a Partial Intravenous Anesthesia Technique for Laboratory Swine.

Various anesthetic protocols are used in laboratory swine, each with specific advantages and disadvantages. Partial intravenous anesthetic techniques (PIVA) help minimize dose-dependent cardiopulmonary effects of inhalant drugs. The aim of this study was to determine the cardiopulmonary effects of a PIVA in laboratory swine. In a prospective, nonrandomized clinical study, 8 healthy juvenile Landrace-White pigs were premedicated with azaperone (0.20 ± 0.20 mg/kg IM), dexmedetomidine (0.02 ± 0.002 mg/kg IM), and alfaxalone (2.0 ± 0.20 mg/kg IM), and anesthesia was induced with intravenous alfaxalone. Anesthesia was maintained by using constant-rate infusion of dexmedetomidine (2 µg/kg/h) and alfaxalone (25 µg/kg/min) in combination with isoflurane. After the fraction of expired isoflurane was adjusted to 1.1% to 1.5%, respiratory rate, heart rate, systemic and pulmonary arterial pressure, central venous pressure, cardiac output, bispectral index, systemic vascular resistance, and arterial and mixed venous blood gases were recorded every 10 min for 60 min. Statistical analysis consisted of repeated-measures one-way ANOVA. Significant decreases occurred in heart rate, pulmonary mean arterial pressure, pulmonary diastolic pressure, partial pressure of arterial oxygen, partial pressure of venous oxygen; significant increases occurred in respiratory rate, minute volume index, diastolic arterial blood pressure, systemic vascular resistance, and arterial pH over time. We consider that the observed statistically significant cardiopulmonary changes were clinically important and that the PIVA protocol provided hemodynamic and respiratory stability for short-term anesthesia of laboratory swine.

Morbidity and Mortality Conferences: A Mini Review and Illustrated Application in Veterinary Medicine.

This mini review presents current knowledge on the role of morbidity and mortality conferences (M&MCs) as a powerful educational tool and driver to improve patient care. Although M&MCs have existed since the early twentieth century, formal evaluation of their impact on education and patient care is relatively recent. Over time, M&MCs have evolved from single discipline discussions with a tendency to focus on individual errors and assign blame, to multidisciplinary, standardized presentations incorporating error analysis techniques, and educational theory. Current evidence shows that M&MCs can provide a valuable educational experience and have the potential to generate measurable improvements in patient care.

Comparison of tranexamic acid plasma concentrations when administered via intraosseous and intravenous routes.

INTRODUCTION: There is a lack of information regarding intraosseous (IO) administration of tranexamic acid (TXA). Our hypothesis was that a single bolus IO injection of TXA will have a similar pharmacokinetic profile to TXA administered at the same dose IV. METHODS: Sixteen male Landrace cross swine (mean body weight 27.6±2.6kg) were divided into an IV group (n=8) and an IO group (n=8). Each animal received 30mg/kg TXA via an IV or IO catheter, respectively. Jugular blood samples were collected for pharmacokinetic analysis over a 3h period. The maximum TXA plasma concentration (Cmax) and corresponding time as well as distribution half-life, elimination half-life, area under the curve, plasma clearance and volume of distribution were calculated. One- and two-way analysis of variance for repeated measures (time, group) with Tukey's and Bonferonni post hoc tests were used to compare TXA plasma concentrations within and between groups, respectively. RESULTS: Plasma concentrations of TXA were significantly higher (p<0.0001) in the IV group during the TXA infusion. Cmax occurred at 4min after initiation of the bolus in the IV group (9.36±3.20ng/µl) and at 5min after initiation of the bolus in the IO group (4.46±0.49ng/µl). Plasma concentrations were very similar from the completion of injection onwards. There were no significant differences between the two administration routes for any other pharmacokinetic variables measured. CONCLUSION: The results of this study support pharmacokinetic bioequivalence of IO and IV administration of TXA.

Splenectomy Versus Sham Splenectomy in a Swine Model of Controlled Hemorrhagic Shock.

INTRODUCTION: Splenectomy is controversial in acute hemorrhagic shock models. OBJECTIVE: To compare splenectomized (SP) versus sham-splenectomized (SSP) swine during acute controlled hemorrhage. METHODS: Twenty-six male Landrace White swine (mean body weight ±â€Šstandard deviation, 33.8 ±â€Š2.9 kg) were used. Ethics approval was obtained. Landrace swine underwent splenectomy (n = 13) or sham-splenectomy (n = 13), were bled to mean arterial blood pressure (MAP) of 40 mm Hg, which was held for 60 min, given 125 mL IV RescueFlow, held for a further 60 min, given whole blood, and held for a final 60 min. Tissue oxygen saturation, thromboelastography, oncotic pressure, urine volume and specific gravity, complete blood count, serum chemistry, body temperature, hematocrit, total solids, arterial and mixed venous blood gas, bispectral index, SAP, MAP, DAP, cardiac index, total blood volume (TBV) removed and returned, rate of hemorrhage and transfusion, spleen weight, heart rate (HR), arterial pH, lactate, PaO2, PaCO2, respiratory rate, cranial mesenteric and renal artery blood flow were recorded. Groups were compared using two-way ANOVA with post hoc Bonferroni (P < 0.05) for repeated measures or t test for non-repeated measures. RESULTS: Compared with the SSP swine, SP swine had higher HR post-splenectomy for the duration of the experiment (P < 0.03), and higher hematocrits at 15 and 60 min post splenectomy (P < 0.01, P < 0.001, respectively). SSP swine had greater TBV removed during hemorrhage (P < 0.01); however, when blood loss based on splenic weight was considered, TBV removed was similar between groups. CONCLUSION: Splenectomy likely accounts for the transient increase in hematocrit and the higher HR in SP swine prior to hemorrhage, and the differences in TBV removed between the two groups during hemorrhage. With a fixed end point model using a moderate rate of acute hemorrhage and an MAP of 40 mm Hg, splenectomy is not necessary and may confound results.

A survey of the use of noninvasive ventilation in academic emergency departments in the United States.

OBJECTIVE: To determine the frequency of, and barriers to, use of noninvasive ventilation (NIV) for adult patients with acute asthma, chronic obstructive pulmonary disease (COPD), and congestive heart failure (CHF) in academic emergency departments (EDs). METHODS: A survey instrument was developed by the authors, pilot tested, and distributed to one physician (MD) and one respiratory therapist (RT) at the 132 hospitals with emergency medicine residencies. RESULTS: The response rate was 90%. Ninety-nine percent of RTs and 64% of MDs are very familiar with NIV (P<.001). The reported time needed to initiate NIV was <10 min for 41% of sites (<20 min for 89%). Compared to the time requirement in other clinical areas, 60% of RTs reported that NIV "takes no additional time" in the ED. An RT is always present in 38% the EDs, and equipment for NIV is readily available in 76% of the EDs. The majority reported that NIV use is about right for acute COPD, CHF, and asthma. NIV is used infrequently for asthma (89% reported use in <20% of these patients), while 66% reported use in >20% of COPD patients and 67% reported use in >20% of CHF patients (P<.001, as compared to asthma). The perceived utility of NIV was significantly different between the 3 diagnoses (P<.001); there was more uncertainty about the utility of NIV for asthma. Bilevel ventilators and oronasal masks are most commonly used for NIV. Nearly all of the centers administer bronchodilators in-line with NIV. CONCLUSIONS: Consistent with available evidence, NIV use is more common in the ED for acute COPD and CHF than for acute asthma. Barriers to greater use of NIV in the ED include physician familiarity, availability of RT and equipment in the ED, and time required for NIV. For acute asthma, uncertainty about therapeutic benefits remains a challenge.

Compliance with recommended cancer screening among emergency department patients: a multicenter survey.

OBJECTIVES: The objectives were to measure compliance with, and possible sociodemographic disparities for, cancer screening among emergency department (ED) patients. METHODS: This was a cross-sectional survey in three academic EDs in Boston. The authors enrolled consecutive adult patients during two 24-hour periods at each site. Self-reported compliance with standard recommendations for cervical, breast, testicular, and prostate cancer screening were measured. The chi-square test was used test to evaluate associations between demographic variables and cancer screening compliance. RESULTS: The authors enrolled 387 patients (81% of those eligible). The participants had a mean (+/- standard deviation) age of 44 (+/-18) years and were 52% female, 16% Hispanic, and 65% white. Sixty-seven percent (95% confidence interval [CI] = 60% to 73%) of all women reported Pap smear examinations in the past 3 years, 92% (95% CI = 85% to 96%) of women aged > or = 40 years reported clinical breast examinations, and 88% (95% CI = 81% to 94%) of women aged > or = 40 years reported mammography. Fifty-one percent (95% CI = 40% to 61%) of men aged 18-39 years reported testicular self-examinations, and among men aged > or = 40 years, 79% (95% CI = 69% to 87%) reported digital rectal examinations (DREs) and 51% (95% CI = 40% to 61%) reported prostate-specific antigen (PSA) testing. Racial and ethnic minorities reported slightly lower rates of clinical breast examinations and testicular self-examinations. CONCLUSIONS: Most women and a majority of men in our ED-based study were compliant with recommended measures of cervical, breast, testicular, and prostate cancer screening. No large sociodemographic disparities in our patient population were identified. Based on these data, and the many other pressing public health needs of our ED population, the authors would be reluctant to promote ED-based cancer screening initiatives at this time.