Competence of anesthesiology residents following a longitudinal point-of-care ultrasound curriculum.

PURPOSE: Point-of-care ultrasound (POCUS) facilitates diagnostic, procedural, and resuscitative applications in anesthesiology. Structured POCUS curricula improve learner satisfaction, test scores, and clinical management, but the learning curve towards competency and retention of skills over time remain unknown. METHODS: We conducted a prospective observational study to determine when anesthesiology trainees enrolled in a POCUS curriculum achieve competency in POCUS skills. We also investigated the learning curve of trainees' competency using a POCUS-specific competency-based medical education assessment. The structured, longitudinal POCUS curriculum included online lectures, journal articles, live model scanning sessions, video review of cases, and a portfolio of supervised scans. Point-of-care ultrasound scanning sessions on standardized patients were conducted in the simulation lab for 2.5 hr a week and each resident completed eight sessions (20 hr) per academic year. At each scanning session, timed image acquisition scores were collected and POCUS skills entrustment scale evaluations were conducted. The primary outcome was the number of supervised scans and sessions required to achieve a mean entrustment score of 4 ("may use independently"). Secondary outcomes included image acquisition scores and retention of skills after six months. RESULTS: The mean (standard deviation) number of supervised scans required for trainees (n = 29) to reach a mean entrustment score of ≥ 4 was 36 (10) scans over nine sessions for rescue echo. A mean entrustment score of ≥ 4 was observed for lung ultrasound after a mean (SD) of 8 (3) scans over two sessions. CONCLUSIONS: Our study shows that anesthesiology residents can achieve competence in rescue echo and lung ultrasound through participation in a structured, longitudinal POCUS curriculum, and outlines the learning curve for progression towards competency.

RéSUMé: OBJECTIF: L'échographie ciblée (POCUS) facilite les applications diagnostiques, procédurales et de réanimation en anesthésiologie. Les programmes de cours structurés en échographie ciblée améliorent la satisfaction des apprenants ainsi que leurs résultats aux examens et leur prise en charge clinique, mais nous connaissons mal la courbe d'apprentissage vers la compétence et le maintien des compétences au fil du temps. MéTHODE: Nous avons réalisé une étude observationnelle prospective afin de déterminer quand les stagiaires en anesthésiologie inscrits à un programme d'échographie ciblée atteignaient les compétences dans ce domaine. Nous avons également étudié la courbe d'apprentissage des compétences des résidents à l'aide d'une évaluation de la formation médicale fondée sur les compétences spécifique à l'échographie ciblée. Le programme d'échographie ciblée structuré et longitudinal comprenait des cours en ligne, des articles de revues, des séances d'examens d'échographie modèles en direct, une revue vidéo de cas et un portefeuille d'examens échographiques supervisés. Des séances d'échographie ciblée sur des patients standardisés ont été réalisées dans le laboratoire de simulation pendant 2,5 heures par semaine et chaque résident a suivi huit séances (20 heures) par année scolaire. À chaque session d'examen échographique, des scores chronométrés d'acquisition d'images ont été colligés et des évaluations d'échelle de confiance des compétences d'échographie ciblée ont été réalisées. Le critère d'évaluation principal était le nombre d'examens et de séances d'échographie supervisés requis pour obtenir un score moyen de confiance de 4 (« peut réaliser une échographie indépendamment ¼). Les critères d'évaluation secondaires comprenaient les scores d'acquisition d'images et le maintien des compétences après six mois. RéSULTATS: Le nombre moyen (écart type) d'examens supervisés requis pour les résidents (n = 29) pour atteindre un score de confiance moyen ≥ 4 était de 36 (10) examens sur neuf sessions pour l'échographie de sauvetage. Un score de confiance moyen ≥ 4 a été observé pour l'échographie pulmonaire après une moyenne (ET) de 8 (3) examens sur deux séances. CONCLUSION: Notre étude montre que les résidents en anesthésiologie peuvent acquérir des compétences en échographie de sauvetage et en échographie pulmonaire en participant à un cours d'échographie ciblée structuré et longitudinal, et décrit la courbe d'apprentissage pour la progression vers la compétence.

The development of a provincial multidisciplinary framework of consensus-based standards for Point of Care Ultrasound at the University of Saskatchewan.

OBJECTIVES: The development and adoption of Point-of-Care Ultrasound (POCUS) across disciplines have created challenges and opportunities in implementing training and utilization standards. Within the context of a large, geographically disparate province, we sought to develop a multidisciplinary POCUS framework outlining consensus-based standards. METHODS: A core working group of local POCUS leaders from Anesthesia, Emergency Medicine, Family Medicine, Intensive Care, Internal Medicine, Pediatrics, and Trauma, in collaboration with western Canadian colleagues, developed a list of key domains for the framework along with a range of potential standards for each area. The members of the working group and the registrants for a multidisciplinary Roundtable discussion at the University of Saskatchewan's annual POCUS conference (SASKSONO19, Saskatoon, Saskatchewan, March 2nd, 2019) were invited to complete a survey on POCUS standards for each domain. The survey results were presented to and discussed by participants at the Roundtable discussion at SASKSONO19 who reached consensus on modified standards for each domain. The modified standards were considered for endorsement by all conference attendees using an audience-response system. RESULTS: The working group proposed standards in eight domains: scope of use, credentialing and privileges, documentation, quality assurance, leadership and governance, teaching, research, and equipment maintenance. Consensus on modified standards was achieved in the 18 participant Roundtable. Each standard was then endorsed by > 90% of conference respondents. CONCLUSION: The resulting framework will inform the utilization of POCUS within Saskatchewan. Both this process and its outcomes could inform the development of multidisciplinary POCUS standards within other jurisdictions.

Peripheral venous pressure predicts central venous pressure poorly in pediatric patients.

PURPOSE: Using peripheral venous pressure (PVP) instead of central venous pressure (CVP) as a volume monitor decreases patient risks and costs, and is convenient. This study was undertaken to determine if PVP predicts CVP in pediatric patients. METHODS: With ethical approval and informed consent, 30 pediatric patients aged neonate to 12 yr requiring a central venous line were studied prospectively in a tertiary care teaching hospital. In the supine position, PVP and CVP were simultaneously transduced. Ninety-six paired recordings of CVP and PVP were made. Correlation and Bland-Altman analysis of agreement of end-expiratory measurements were performed. RESULTS: The mean (SD; range) CVP was 10.0 mmHg (6.0; -1.0 to 27.0); the mean PVP was 13.7 mmHg (6.3; 0.0 to 33.0); offset (bias) of PVP > CVP was 3.7 mmHg with SD 2.6. The 95% confidence intervals (CI) for the bias were 3.2 to 4.1 mmHg. In the Bland-Altman analysis, lower and upper limits of agreement (LOA; CI in parentheses) were -1.5 (-2.3 to -0.7) and 8.8 (8.1 to 9.6) mmHg. Eight of 96 points were outside the limits of agreement. The correlation of PVP on CVP was r = 0.92, P < 0.0001. For a subset of ten patients (20 simultaneous recordings) with iv catheters proximal to the hand, limits of agreement were better - offset: 3.8 mmHg (+/- 1.4); lower LOA: 1.2 mmHg (0.25 to 2.1); upper LOA: 6.6 mmHg (5.7 to 7.5). CONCLUSION: Peripheral venous pressure measured from an iv catheter in the hand predicts CVP poorly in pediatric patients.

Psychiatric side effects of indomethacin in parturients.

PURPOSE: To examine the central nervous system side effects of the non-steroidal anti-inflammatory drug (NSAID) indomethacin in a case-series of obstetric patients. METHODS: The hospital records of patients experiencing any postpartum complication between 1994 and 1999 were reviewed for adverse drug reactions (ADR) attributed to indomethacin. Additional cases of indomethacin-induced adverse effects were identified through reports to the nursing administration and the Saskatchewan ADR reporting program. The Naranjo ADR probability scale was applied to all cases. RESULTS: Thirty-two patients experienced a psychiatric reaction after receiving indomethacin for postpartum pain. The symptoms were often severe and included dizziness, anxiety, fear, agitation, affective lability, depersonalization, paranoia, and hallucinations. There was no past psychiatric history documented in any of the cases. CONCLUSION: This study identifies a possible ADR to indomethacin occurring in postpartum patients. Whether the vulnerability to these neuropsychiatric reactions is randomly distributed or if parturients are at increased risk is yet to be determined. Proposed mechanisms of these side effects include a postpartum dopamine supersensitivity exacerbated by prostaglandin inhibition as well as a structural similarity between serotonin and indomethacin. The severity of the reactions to indomethacin in parturients and the potential for these disturbing psychiatric side effects to compromise the safety of both mother and infant have led to the use of alternative analgesics including different classes of NSAIDs for this population at our institution.