Confirmation of endotracheal tube position: a narrative review.

Endotracheal tube (ETT) insertion is the primary method of definitive airway protection and control in critically ill patients. Detection of ETT malposition in a timely fashion is crucial in both elective and emergent intubation. In this review, we describe classic tests and highlight several new technologies that may assist the practitioner in determining ETT position within the esophago-tracheal complex, namely ultrasonographic and impedance-based methods. Strengths and weaknesses of particular methods are highlighted. Although many physical examination maneuvers have been described, reliance on the physical examination alone is insufficient for confirmation. Touted methods that appear failsafe, such as direct visualization of the ETT traversing the vocal cords have limitations, especially when dealing in the emergency setting accompanying a difficult to visualize airway. While carbon dioxide detection is an excellent confirmatory method, it is not infallible. Esophageal detection devices are useful as an alternative means of confirmation. New methods such as ultrasonic location of the ETT show promise but require further study. The clinician performing ETT insertion should have multiple confirmation methods that allow the practitioner to adapt to a variety of clinical situations, depending on local costs and availability. Finally, when the clinician still has uncertainty, or multiple tests give conflicting results, the availability of bronchoscopy at the bedside to visualize the carina through the ETT is useful.

Comparison between Simulation-based Training and Lecture-based Education in Teaching Situation Awareness. A Randomized Controlled Study.

RATIONALE: Situation awareness has been defined as the perception of the elements in the environment within volumes of time and space, the comprehension of their meaning, and the projection of their status in the near future. Intensivists often make time-sensitive critical decisions, and loss of situation awareness can lead to errors. It has been shown that simulation-based training is superior to lecture-based training for some critical scenarios. Because the methods of training to improve situation awareness have not been well studied in the medical field, we compared the impact of simulation vs. lecture training using the Situation Awareness Global Assessment Technique (SAGAT) score. OBJECTIVES: To identify an effective method for teaching situation awareness. METHODS: We randomly assigned 17 critical care fellows to simulation vs. lecture training. Training consisted of eight cases on airway management, including topics such as elevated intracranial pressure, difficult airway, arrhythmia, and shock. During the testing scenario, at random times between 4 and 6 minutes into the simulation, the scenario was frozen, and the screens were blanked. Respondents then completed the 28 questions on the SAGAT scale. Sample items were categorized as Perception, Projection, and Comprehension of the situation. Results were analyzed using SPSS Version 21. RESULTS: Eight fellows from the simulation group and nine from the lecture group underwent simulation testing. Sixty-four SAGAT scores were recorded for the simulation group and 48 scores were recorded for the lecture group. The mean simulation vs. lecture group SAGAT score was 64.3 ± 10.1 (SD) vs. 59.7 ± 10.8 (SD) (P = 0.02). There was also a difference in the median Perception ability between the simulation vs. lecture groups (61.1 vs. 55.5, P = 0.01). There was no difference in the median Projection and Comprehension scores between the two groups (50.0 vs. 50.0, P = 0.92, and 83.3 vs. 83.3, P = 0.27). CONCLUSIONS: We found a significant, albeit modest, difference between simulation training and lecture training on the total SAGAT score of situation awareness mainly because of the improvement in perception ability. Simulation may be a superior method of teaching situation awareness.

Development and Validation of an Assessment Tool for Competency in Critical Care Ultrasound.

BACKGROUND: Point-of-care ultrasound is an emerging technology in critical care medicine. Despite requirements for critical care medicine fellowship programs to demonstrate knowledge and competency in point-of-care ultrasound, tools to guide competency-based training are lacking. OBJECTIVE: We describe the development and validity arguments of a competency assessment tool for critical care ultrasound. METHODS: A modified Delphi method was used to develop behaviorally anchored checklists for 2 ultrasound applications: "Perform deep venous thrombosis study (DVT)" and "Qualify left ventricular function using parasternal long axis and parasternal short axis views (Echo)." One live rater and 1 video rater evaluated performance of 28 fellows. A second video rater evaluated a subset of 10 fellows. Validity evidence for content, response process, and internal consistency was assessed. RESULTS: An expert panel finalized checklists after 2 rounds of a modified Delphi method. The DVT checklist consisted of 13 items, including 1.00 global rating step (GRS). The Echo checklist consisted of 14 items, and included 1.00 GRS for each of 2 views. Interrater reliability evaluated with a Cohen kappa between the live and video rater was 1.00 for the DVT GRS, 0.44 for the PSLA GRS, and 0.58 for the PSSA GRS. Cronbach α was 0.85 for DVT and 0.92 for Echo. CONCLUSIONS: The findings offer preliminary evidence for the validity of competency assessment tools for 2 applications of critical care ultrasound and data on live versus video raters.

Left ventricular diastolic dysfunction in the intensive care unit: trends and perspectives.

Heart failure with a normal or nearly normal left ventricular (LV) ejection fraction (HFNEF) may represent more than 50% of heart failure cases. Although HFNEF is being increasingly recognized, there is a relative lack of information regarding its incidence and prognostic implications in intensive care unit (ICU) patients. In the ICU, many factors related to patient's history, or applied therapies, may induce or aggravate LV diastolic dysfunction. This may impact on patients' morbidity and mortality. This paper discusses methods for assessing LV diastolic function and the feasibility of their implementation for diagnosing HFNEF in the ICU.

A prerotational, simulation-based workshop improves the safety of central venous catheter insertion: results of a successful internal medicine house staff training program.

BACKGROUND: The purpose of this study was to evaluate the effectiveness of a simulation-based workshop with ultrasonography instruction in reducing mechanical complications associated with central venous catheter (CVC) insertion. METHODS: A single-center prospective cohort study was conducted in the medical ICU and respiratory step-down unit of an urban teaching hospital. Fifty-six medical house staff members were trained prior to their rotations over a 6-month period. The data on mechanical complication rates after the implementation of the workshop were compared with previous experience when no structured educational program existed. RESULTS: There were 334 procedures in the preeducation period compared to 402 procedures in the posteducation period. The overall complication rate, including placement failure, in the preeducation and posteducation period was 32.9% and 22.9%, respectively (P < .01). Placement failure rate decreased from 22.8% to 16.2% (P = .02), and arterial punctures decreased from 4.2% to 1.5% (P = .03). Ultrasonography usage increased from 3.0% to 61.4% (P < .01). Multivariate analysis demonstrated that interns were more likely to cause overall mechanical complications compared with fellows and attending physicians in the preeducation period (P = .02); however, this trend was not observed in the posteducation period. Catheter site and ultrasonography usage significantly affected the overall complication rate in both periods, and ultrasound-guided femoral CVC was the safest procedure in the posteducation period. CONCLUSIONS: Implementation of a prerotational workshop significantly improved the safety of CVC insertion, especially for CVCs placed by inexperienced operators. We suggest that simulation-based training with ultrasonography instruction should be conducted if house staff members are responsible for CVC placement.