The Impact of Thoracic Ultrasound on Clinical Management of Critically Ill Patients (UltraMan): An International Prospective Observational Study.

OBJECTIVES: To investigate the impact of thoracic ultrasound (TUS) examinations on clinical management in adult ICU patients. DESIGN: A prospective international observational study. SETTING: Four centers in The Netherlands and Italy. PATIENTS: Adult ICU patients (> 18 yr) that received a clinically indicated lung ultrasound examination. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Clinicians performing TUS completed a pre- and post-examination case report form. Patient characteristics, TUS, and resulting clinical effects were recorded. First, change of management, defined as a TUS-induced change in clinical impression leading to a change in treatment plan, was reported. Second, execution of intended management changes within 8 hours was verified. Third, change in fluid balance after 8 hours was calculated. A total of 725 TUS performed by 111 operators across 534 patients (mean age 63 ± 15.0, 70% male) were included. Almost half of TUS caused a change in clinical impression, which resulted in change of management in 39% of cases. The remainder of TUS confirmed the clinical impression, while a minority (4%) did not contribute. Eighty-nine percent of management changes indicated by TUS were executed within 8 hours. TUS examinations that led to a change in fluid management also led to distinct and appropriate changes in patient's fluid balance. CONCLUSIONS: In this international observational study in adult ICU patients, use of TUS had a major impact on clinical management. These results provide grounds for future randomized controlled trials to determine if TUS-induced changes in decision-making also lead to improved health outcomes.

Effect of continuous wireless vital sign monitoring on unplanned ICU admissions and rapid response team calls: a before-and-after study.

BACKGROUND: Continuous vital sign monitoring may potentially be improved through the use of wearable monitors linked wirelessly to hospital electronic patient records. By improving early detection of physiological deterioration this approach may save lives. METHODS: We performed a single-centre before-and-after study including surgical and medical patients at a university hospital in The Netherlands. The study intervention was continuous vital sign monitoring using wearable monitors linked wirelessly to hospital systems. The co-primary outcomes were unplanned ICU admission and rapid response team calls. Secondary outcomes were length of hospital stay and in-patient death. RESULTS: Our baseline cohort included 2466 admissions and our intervention cohort included 2303 admissions recruited from August 2017 to July 2019. Patients in the intervention cohort experienced fewer unplanned ICU admissions (84 [3.4%] vs 54 [2.3%]; P=0.03) and fewer rapid response team calls (107 [4.3%] vs 71 [3.1%]; P=0.02). The number of rapid response team calls that did not result in ICU admission also declined (70 [2.8%] vs 45 [2.0%]; P=0.05). The number of rapid response team calls that did result in ICU admission was not significantly different (52 [2.1%] vs 36 [1.6%]; P=0.16). There were no differences in hospital stay or in-patient deaths between the two study periods. CONCLUSIONS: Continuous monitoring of patient vital signs using wearable monitoring technology linked wirelessly to hospital systems was associated with a reduction in unplanned ICU admissions and rapid response team calls. Further research is necessary to confirm the impact of this approach on patient survival.

Ultrasound to Detect Central Venous Catheter Placement Associated Complications: A Multicenter Diagnostic Accuracy Study.

BACKGROUND: Mechanical complications arising after central venous catheter placement are mostly malposition or pneumothorax. To date, to confirm correct position and detect pneumothorax, chest x-ray film has been the reference standard, while ultrasound might be an accurate alternative. The aim of this study was to evaluate diagnostic accuracy of ultrasound to detect central venous catheter malposition and pneumothorax. METHODS: This was a prospective, multicenter, diagnostic accuracy study conducted at the intensive care unit and postanesthesia care unit. Adult patients who underwent central venous catheterization of the internal jugular vein or subclavian vein were included. Index test consisted of venous, cardiac, and lung ultrasound. Standard reference test was chest x-ray film. Primary outcome was diagnostic accuracy of ultrasound to detect malposition and pneumothorax; for malposition, sensitivity, specificity, and other accuracy parameters were estimated. For pneumothorax, because chest x-ray film is an inaccurate reference standard to diagnose it, agreement and Cohen's κ-coefficient were determined. Secondary outcomes were accuracy of ultrasound to detect clinically relevant complications and feasibility of ultrasound. RESULTS: In total, 758 central venous catheterizations were included. Malposition occurred in 23 (3.3%) out of 688 cases included in the analysis. Ultrasound sensitivity was 0.70 (95% CI, 0.49 to 0.86) and specificity 0.99 (95% CI, 0.98 to 1.00). Pneumothorax occurred in 5 (0.7%) to 11 (1.5%) out of 756 cases according to chest x-ray film and ultrasound, respectively. In 748 out of 756 cases (98.9%), there was agreement between ultrasound and chest x-ray film with a Cohen's κ-coefficient of 0.50 (95% CI, 0.19 to 0.80). CONCLUSIONS: This multicenter study shows that the complication rate of central venous catheterization is low and that ultrasound produces a moderate sensitivity and high specificity to detect malposition. There is moderate agreement with chest x-ray film for pneumothorax. In conclusion, ultrasound is an accurate diagnostic modality to detect malposition and pneumothorax.

Diagnostic Accuracy of Chest Radiograph, and When Concomitantly Studied Lung Ultrasound, in Critically Ill Patients With Respiratory Symptoms: A Systematic Review and Meta-Analysis.

OBJECTIVES: Chest radiograph is considered the first-line diagnostic imaging modality for patients presenting with pulmonary symptoms in the ICU. In this meta-analysis, we aim to evaluate the diagnostic accuracy of chest radiograph, and when concomitantly studied lung ultrasound, in comparison with the gold-standard CT for adult critically ill patients with respiratory symptoms. DATA SOURCES: PubMed, EMBASE, and Gray literature. STUDY SELECTION: Studies comparing chest radiograph, and if performed lung ultrasound, with CT for adult ICU patients with respiratory symptoms. DATA EXTRACTION: Quality was scored with Quality Assessment of Diagnostic Accuracy Studies-2, and study setting, test characteristics, and study design were extracted. DATA SYNTHESIS: In the meta-analysis, we included 10 full-text studies, including 543 patients, and found that chest radiograph has an overall sensitivity of 49% (95% CI, 40-58%) and specificity of 92% (86-95%). In seven studies, where also lung ultrasound was studied, lung ultrasound had an overall sensitivity of 95% (92-96%) and specificity of 94% (90-97%). Substantial heterogeneity was found. A planned subgroup analysis for individual pathologies was performed. The results of four abstract-only studies, included in the systematic review, were considered unlikely to significantly influence results of our meta-analysis. Study limitations were that most studies were of low power combined with methodological limitations. CONCLUSIONS: This meta-analysis demonstrates that chest radiograph has a low sensitivity and reasonable specificity compared with CT for detecting lung pathology in critically ill patients. The studies also investigating lung ultrasound, showed lung ultrasound to be clearly superior to chest radiograph in terms of sensitivity with similar specificity, thereby opting to be the first-line diagnostic tool in these patients.

Postanesthesia care by remote monitoring of vital signs in surgical wards.

PURPOSE OF REVIEW: This narrative review summarizes recent insights into the role of remote monitoring of vital signs in the postoperative period in surgical wards. RECENT FINDINGS: Despite recent improvements in the safety of anesthesia and surgical procedures, postoperative complication rates are still unacceptably high. This is partly attributable to the intermittent provision of personal care to patients by nurses and ward physicians. Continuous remote monitoring of vital functions in the early postoperative period may reduce these complication rates. There are several medical-grade remote monitoring platforms available that integrate a biosensor signal with electronic patient records, enabling automated prediction or notification of patient deterioration. Most available platforms have technical limitations with respect to the accuracy of respiratory rate measurements. Of note, although the implementation of automated notifications of patient deterioration is associated with a reduced activation of acute response teams, the involvement of ward physicians in the early diagnosis and treatment of subtle changes in vital functions is increased. SUMMARY: Remote monitoring of vital signs in the surgical ward may contribute to prevention of severe complications and reduction in failure-to-rescue rates, although evidence for this association is still lacking. Anesthesiologists should contribute their knowledge and skills with respect to perioperative abnormalities in vital functions to improve patient safety during the postoperative period.

Photoplethysmography respiratory rate monitoring in patients receiving procedural sedation and analgesia for upper gastrointestinal endoscopy.

The value of capnography during procedural sedation and analgesia (PSA) for the detection of hypoxaemia during upper gastrointestinal (UGI) endoscopic procedures is limited. Photoplethysmography respiratory rate (RRp) monitoring may provide a useful alternative, but the level of agreement with capnography during PSA is unknown. We therefore investigated the level of agreement between the RRp and capnography-based RR (RRc) during PSA for UGI endoscopy. This study included patients undergoing PSA for UGI endoscopy procedures. Pulse oximetry (SpO2) and RRc were recorded in combination with Nellcor 2.0 (RRp) monitoring (Covidien, USA). Bland-Altman analysis was used to evaluate the level of agreement between RRc and RRp. Episodes of apnoea, defined as no detection of exhaled CO2 for minimal 36 s, and hypoxaemia, defined as an SpO2 < 92 %, were registered. A total of 1054 min of data from 26 patients were analysed. Bland-Altman analysis between the RRc and RRp revealed a bias of 2.25 ± 5.41 breath rate per minute (brpm), with limits of agreement from -8.35 to 12.84 brpm for an RR ≥ 4 brpm. A total of 67 apnoea events were detected. In 21 % of all apnoea events, the patient became hypoxaemic. Hypoxaemia occurred 42 times with a median length of 34 (19-141) s, and was preceded in 34 % of the cases by apnoea and in 64 % by an RRc ≥ 8 brpm. In 81 % of all apnoea events, photoplethysmography registered an RRp ≥ 4 brpm. We found a low level of agreement between capnography and the plethysmography respiratory rate during procedural sedation for UGI endoscopy. Moreover, respiratory rate derived from both the capnogram and photoplethysmogram showed a limited ability to provide warning signs for a hypoxaemic event during the sedation procedure.

Considerations in Neuromuscular Blockade in the ICU: A Case Report and Review of the Literature.

Neuromuscular blocking agents are regularly used in the intensive care unit (ICU) to facilitate mechanical ventilation in patients with acute respiratory distress syndrome and patient-ventilator dyssynchronies. However, prolonged neuromuscular blockade is associated with adverse effects like ICU-acquired weakness. Residual neuromuscular blockade is, however, not routinely monitored in the intensive care unit, and as such, this phenomenon might be unrecognized and underreported. We report a case in which an unusual prolonged effect of neuromuscular blockade was seen after cessation of the drug, which illustrates the complexity of neuromuscular blockade in the ICU. We advocate for the use of train-of-four measurements in the ICU, recommend to choose cisatracurium over rocuronium in critically ill patients due to their pharmacokinetics when continuous neuromuscular blockade is considered, and propose a subsequent strategy once the choice has been made to start neuromuscular blockade.

Relation of aortic valve and coronary artery calcium in patients with chronic kidney disease to the stage and etiology of the renal disease.

Patients with chronic renal failure have increased cardiac calcium loads. Previous studies have investigated the prevalence and quantitative extent of aortic valve calcium (AVC) and coronary artery calcium (CAC) in patients with various stages of chronic kidney disease (CKD). However, the impact of preexisting atherosclerosis on the calcification burden has not been clarified. Therefore, this study was conducted to examine the effect of CKD stage as well as the primary cause of renal failure (atherosclerotic vs nonatherosclerotic) on AVC and CAC. Twenty-two, 13, and 28 patients with stage 3, 4, and 5 CKD, respectively, were included, of whom 24 had atherosclerotic CKD. Patients underwent electron-beam computed tomography to assess AVC and CAC. AVC was present in 27% of patients with stage 3 CKD, in 38% of patients with stage 4 CKD, and in 43% of patients with stage 5 CKD. CAC was present in 77% of patients with stage 3 CKD, in 54% of patients with stage 4 CKD, and in 64% of patients with stage 5 CKD. There was no correlation between CKD stage and the quantitative extent of AVC and CAC. AVC was more frequent (58% vs 23%, p <0.01) and more extensive (median score 43 [range 0 to 494] vs 0 [range 0 to 8], p <0.01) in patients with CKD caused by atherosclerotic renal disease than in patients with nonatherosclerotic causes of CKD. CAC was more frequent (83% vs 56%, p <0.05) and more extensive (median score 437 [range 61 to 1,565] vs 31 [range 0 to 155], p <0.001) in patients with atherosclerotic causes of CKD than in patients with CKD caused by nonatherosclerotic renal disease. In conclusion, the prevalence as well as the severity of AVC and CAC did not vary between patients with stage 3, 4, and 5 CKD. Cardiac calcification, both AVC and CAC, were more frequent and more severe in patients with atherosclerotic causes of renal failure. These results suggest that cardiac calcium is related to atherosclerotic burden rather than to the severity of CKD.