Relationship between volume and survival in closed intensive care units is weak and apparent only in mechanically ventilated patients.

BACKGROUND: Recent studies have found an association between increased volume and increased intensive care unit (ICU) survival; however, this association might not hold true in ICUs with permanent intensivist coverage. Our objective was to determine whether ICU volume correlates with survival in the Spanish healthcare system. METHODS: Post hoc analysis of a prospective study of all patients admitted to 29 ICUs during 3 months. At ICU discharge, the authors recorded demographic variables, severity score, and specific ICU treatments. Follow-up variables included ICU readmission and hospital mortality. Statistics include logistic multivariate analyses for hospital mortality according to quartiles of volume of patients. RESULTS: The authors studied 4,001 patients with a mean predicted risk of death of 23% (range at hospital level: 14-46%). Observed hospital mortality was 19% (range at hospital level: 11-35%), resulting in a standardized mortality ratio of 0.81 (range: 0.5-1.3). Among the 1,923 patients needing mechanical ventilation, the predicted risk of death was 32% (14-60%) and observed hospital mortality was 30% (12-61%), resulting in a standardized mortality ratio of 0.96 (0.5-1.7). The authors found no correlation between standardized mortality ratio and ICU volume in the entire population or in mechanically ventilated patients. Only mechanically ventilated patients in very low-volume ICUs had slightly worse outcome. CONCLUSION: In the currently studied healthcare system characterized by 24/7 intensivist coverage, the authors found wide variability in outcome among ICUs even after adjusting for severity of illness but no relationship between ICU volume and outcome. Only mechanically ventilated patients in very low-volume centers had slightly worse outcomes.

Systematic Review of Automated Diuresis Measurement in Critically Ill Patients.

The measurement of urinary flow is a vital medical indicator for critically ill patients in intensive care units. However, there is a clinical need to automate the real-time measurement of diuresis using Internet of Medical Things devices, allowing continuous monitoring of urine flow. A systematic review of scientific literature, patents, and available commercial products was conducted, leading to the conclusion that there is no suitable device to fulfill this need. We identified six characteristics that such a device should possess: minimizing contact with urine, detecting changes in flow patterns, the ability to record minute-by-minute data, capable of sending early alerts, not relying on exclusive disposable components, and being user-friendly for clinical professionals. Additionally, cost-effectiveness is crucial, encompassing the device, infrastructure, maintenance, and usage.

Development of a urinometer for automatic measurement of urine flow in catheterized patients.

Urinary flow measurement and colorimetry are vital medical indicators for critically ill patients in intensive care units. However, there is a clinical need for low-cost, continuous urinary flow monitoring devices that can automatically and in real-time measure urine flow. This need led to the development of a non-invasive device that is easy to use and does not require proprietary disposables. The device operates by detecting urine flow using an infrared barrier that returns an unequivocal pattern, and it is capable of measuring the volume of liquid in real-time, storing the history with a precise date, and returning alarms to detect critical trends. The device also has the ability to detect the color of urine, allowing for extended data and detecting problems in catheterized patients such as hematuria. The device is proposed as an automated clinical decision support system that utilizes the concept of the Internet of Medical Things. It works by using a LoRa communication method with the LoRaWAN protocol to maximize the distance to access points, reducing infrastructure costs in massive deployments. The device can send data wirelessly for remote monitoring and allows for the collection of data on a dashboard in a pseudonymous way. Tests conducted on the device using a gold standard medical grade infusion pump and fluid densities within the 1.005 g/ml to 1.030 g/ml urine density range showed that droplets were satisfactorily captured in the range of flows from less than 1 ml/h to 500 ml/h, which are acceptable ranges for urinary flow. Errors ranged below 15%, when compared to the values obtained by the hospital infusion pump used as gold standard. Such values are clinically adequate to detect changes in diuresis patterns, specially at low urine output ranges, related to renal disfunction. Additionally, tests carried out with different color patterns indicate that it detects different colors of urine with a precision in detecting RGB values <5%. In conclusion, the results suggest that the device can be useful in automatically monitoring diuresis and colorimetry in real-time, which can facilitate the work of nursing and provide automatic decision-making support to intensive care physicians.

Trifecta Bioprosthesis Sudden-Onset Three-Leaflet Detachment.

Acute bioprosthesis failure is an uncommon event that may require urgent surgery. This is even less frequent when it is not associated with endocarditis, thrombus formation, or structural valve deterioration. We describe an acute complete detachment of the 3 leaflets of a Trifecta tissue valve 6 years after implantation in a patient who suddenly experienced strong chest pain with severe dyspnea. In the operating room, total detachment of the 3 leaflets from the scalloped cuff and from 1 of the cusps was observed. No signs of endocarditis or leaflet calcifications were found.

[Post-Intensive Care Unit mortality and related prognostic factors in a cohort of critically ill patients with multi-organ dysfunction]. / Mortalidad tras el alta de la Unidad de Cuidados Intensivos y factores pronósticos relacionados en una cohorte de pacientes críticos con disfunción multiorgánica.

BACKGROUND AND OBJECTIVE: To assess the post-Intensive Care Unit (ICU) mortality (in-hospital and one year after hospital discharge) and the associated factors. PATIENTS AND METHOD: Cohort design in medical-surgical patients with multi-organ dysfunction syndrome (MODS) during the first 24h of admission to ICU. We recorded the following data: personal background, functional general situation, general information about admission to ICU, hospital stay and contact by phone after one year of hospital discharge. We registered mortality at the follow-up at anytime. Cox regression was performed to evaluate mortality factors. RESULTS: Five hundred and forty five patients were recruited. During the study period 256 patients (52.9%) died; out of them 29.5% in ICU; 14.8% of 384 patients transferred to the ward died. Of 327 discharged patients, 266 (81.3%) were contacted; 14.3% of those had died. In-hospital death-related factors were age (odds ratio [OR] 1.04; 95% confidence interval [95% CI] 1.02-1.06; P<.01) and a decreased functional general status (OR 1.7; 95% CI 1.1-2.9; P<.05). Post-hospitalisation mortality-related variables were: diminished functional general status (OR 2.42; 95% CI 1.23-4.75; P<.01) and readmission after discharge from hospital (1.45 OR; 95% CI 1.19-1.76; P<.001). CONCLUSIONS: Patients admitted for a medical-surgical MODS presented a mortality of 52.9% within one year. The factors influencing hospital mortality are age and a generally diminished functional status, both being not modifiable factors. After discharge, the decreased general functional status remained central along with the re-hospitalisation.

Clinical presentation of acute coronary syndrome in patients previously treated with nitrates.

AIMS: Several reports have suggested that nitrates limit acute ischaemic damage by a mechanism similar to preconditioning. This study aims to evaluate the effect of chronic oral nitrates on the clinical presentation and short-term outcomes of patients admitted with acute coronary syndrome (ACS). METHODS: A retrospective cohort study was conducted in patients with ACS admitted to 62 acute care units from 2010 to 2011. A propensity score-matched samples analysis was performed. RESULTS: We analysed 3171 consecutive patients, of whom 298 (9.4%) were chronically treated with nitrates. Patients previously treated with nitrates had higher comorbidity and disease severity at admission, lower prevalence of ACS with ST elevation, lower troponin elevation, higher prevalence of initial Killip class 2-4 and higher hospital mortality. The propensity score-matched analysis confirmed that previous use of nitrates is independently associated with a lower prevalence of ST-elevation ACS [odds ratio (OR) 0.53, 95% confidence interval (CI) 0.36-0.78; P = 0.0014] and a lower troponin elevation (OR 0.61, 95% CI 0.41-0.92) but not with Killip class on admission (OR 1.18, 95% CI 0.83-1.67, P = 0.3697) or mortality (OR 0.71, 95% CI 0.37-1.38, P = 0.3196). CONCLUSION: The results support the hypothesis that nitrates have a protective effect on acute ischaemic injury.