安田 英人

OBJECTIVES: We aim to assess the early use of contrast-enhanced computed tomography (CECT) of patients with severe acute pancreatitis (SAP) using the computed tomography severity index (CTSI) in prognosis prediction. The CTSI combines quantification of pancreatic and extrapancreatic inflammation with the extent of pancreatic necrosis. METHODS: Post-hoc retrospective analysis of a large, multicentric database (44 institutions) of SAP patients in Japan. The area under the curve (AUC) of the CTSI for predicting mortality and the odds ratio (OR) of the extent of pancreatic inflammation and necrosis were calculated using multivariable analysis. RESULTS: In total, 1097 patients were included. The AUC of the CTSI for mortality was 0.65 (95 % confidence interval [CI:] [0.59-0.70]; p < 0.001). In multivariable analysis, necrosis 30-50 % and >50 % in low-enhanced pancreatic parenchyma (LEPP) was independently associated with a significant increase in mortality, with OR 2.04 and 95 % CI 1.01-4.12 (P < 0.05) and OR 3.88 and 95 % CI 2.04-7.40 (P < 0.001), respectively. However, the extent of pancreatic inflammation was not associated with mortality, regardless of severity. CONCLUSIONS: The degree of necrosis in LEPP assessed using early CECT of SAP was a better predictor of mortality than the extent of pancreatic inflammation.

AIM OF THE STUDY: Peripheral intravascular catheter (PIVC) insertion is frequently performed in the emergency room (ER) and many failures of initial PIVC insertion occur. To reduce the failures, new needles were developed. This study aimed to investigate whether the use of the newly developed needle reduced the failure of initial PIVC insertion in the ER compared with the use of the existing needle. MATERIAL AND METHODS: This single-centre, prospective observational study was conducted in Japan between April 1, 2022, and February 2, 2023. We included consecutive patients who visited our hospital by ambulance as a secondary emergency on a weekday during the day shift (from 8:00 AM to 5:00 PM). The practitioners for PIVC insertion and assessors were independent. The primary and secondary outcomes were the failure of initial PIVC insertion and number of procedures, respectively. We defined the difficulty of titrating, leakage, and hematoma within 30 s after insertion as failures. To evaluate the association between the outcomes and the use of newly developed needles, we performed multivariate logistic regression and multiple regression analyses by adjusting for covariates. RESULTS: In total, 522 patients without missing data were analysed, and 81 (15.5%) patients showed failure of initial PIVC insertion. The median number of procedures (interquartile range) was 1 (1-1). Multivariate logistic regression analysis revealed no significant association between the use of newly developed PIVCs and the failure of initial PIVC insertion (odds ratio, 0.79; 95% confidence interval, [0.48-1.31]; p = 0.36). Moreover, multiple regression analysis revealed no significant association between the use of newly developed PIVCs and the number of procedures (regression coefficient, -0.0042; 95% confidence interval, [-0.065-0.056]; p = 0.89). CONCLUSIONS: Our study did not show a difference between the two types of needles with respect to the failure of initial PIVC insertion and the number of procedures.