Journal of Intensive Care Medicine最新文献

Background: The methicillin-resistant Staphylococcus aureus (MRSA) accounts for 20% to 40% of all hospital-acquired pneumonia (HAP) cases with mortality rates up to 55%. Prompt and accurate diagnosis is essential, especially in intensive care unit (ICU) patients. Nasal MRSA polymerase chain reaction (PCR) diagnostic utility evidence is conflicting in the literature for HAP due to a low number of HAP patients included in prior studies or due to the lack of high-yield gold standard cultures defined for comparisons. Methods: This was a retrospective cohort study conducted in a 65-bed medical ICU, and encompassing all adult patients admitted from January 2015 to March 2023 for HAP. Respiratory cultures included were those obtained by bronchoalveolar lavage or endotracheal suction within 7 days of nasal MRSA PCR testing. Results: The study included 412 patients; 56.8% were males and 65% were Whites. The mean age was 60.5 years. Most patients (82.5%) underwent MRSA-PCR before intubation, and the average time between MRSA-PCR and lower respiratory cultures was 2.15 days. The diagnostic performance of nasal MRSA PCR in diagnosing HAP in the ICU yielded a sensitivity (Sen) of 47.83%, specificity (Sp) of 92.29%, positive predictive value (PPV) of 26.83%, and negative predictive value (NPV) of 96.77%. For nonventilator HAP (nv-HAP) cases sensitivity was at 50%, specificity 92.83%, PPV 28.57%, and NPV at 97.00%. In ventilator-acquired pneumonia (VAP-HAP), the corresponding values were 42.86%, 90.91%, 23.08%, and 96.15%, respectively. Conclusion: The nasal MRSA PCR shows a high NPV and low false negative rate, suggesting it is a reliable tool for ruling out MRSA HAP in ICU patients. Care should be taken into account for disease prevalence and clinical context, as these factors may influence test performance. Further validation through prospective large-sample studies utilizing high-yield lower respiratory tract cultures is necessary to confirm our findings.

Background: Implementation of the "B" element-both spontaneous awakening trials (SATs) and spontaneous breathing trials (SBTs)-of the ABCDEF bundle improves the outcomes for mechanically ventilated patients. In 2021, the Pragmatic Investigation of optimal Oxygen Targets (PILOT) trial investigating optimal oxygenation targets in patients on mechanical ventilation was completed.

Objectives: To compare SAT and SBT conduct between a randomized controlled trial and current clinical care.

Methods: The 2008 Awakening and Breathing Controlled (ABC) Trial (2003-2006) randomized mechanically ventilated patients to paired SATs and SBTs versus sedation per usual care plus SBTs. The PILOT trial (2018-2021) enrolled patients years later where SAT + SBT conduct was observed. We compared SAT and SBT conduct in ABC's interventional group (SAT + SBT; n = 167, 1140 patient days) to that in PILOT (n = 2083, 8355 patient days).

Results: Spontaneous awakening trial safety screens were done in all 1140 ABC patient-days on sedation and/or analgesia and in 3889 of 4228 (92%) in PILOT. Spontaneous awakening trial safety screens were passed in 939 of 1140 (82%) instances in ABC versus only 1897 of 3889 (49%) in PILOT. Interestingly, SAT was performed in ≥95% of passed SAT safety screens in both trials and was passed in 837 of 895 (94%) in ABC versus 1145 of 1867 (61%) in PILOT. SBT safety screens were performed in all 983 ABC instances and 8031 of 8370 (96%) in PILOT. SBT safety screens were passed in 647 of 983 (66%) in ABC versus 4475 of 8031 (56%) in PILOT. Spontaneous breathing trial was performed in ≥93% of passed SBT safety screens in both trials and was passed in 319 of 603 (53%) in ABC versus 3337 of 4454 (75%) in PILOT.

Conclusion: This study compared SAT/SBT conduction in an ideal setting to real-world practice, 13 years later. Performance of SAT/SBT safety screens, SATs, and SBTs between a definitive clinical trial (ABC) as compared to current clinical care (PILOT) remained high.

The prone position is often used for patients with adult respiratory distress syndrome and specific surgical postures. When performing venous cannulation in this position, it is important to have a structured review to introduce the available major veins and ultrasound-guided procedure. In this review, we discuss the techniques of ultrasound-guided cannulation and provide insights into various aspects, including the anatomical locations of veins, vein sizes, placement techniques, surrounding structures at risk, and reported experiences with catheter placements. Eight major veins can be accessed in the prone position: the internal jugular vein, external jugular vein, brachiocephalic vein, basilic vein, mid-thigh femoral vein, popliteal vein, posterior tibial vein, and small saphenous vein. To minimize the risk of venous thromboembolism, the ratio of catheter diameter to vessel diameter should be less than 0.67. The review also presents the minimal requirement of venous diameter for different catheters in a tabulated form. For larger veins, real-time ultrasound guidance with the long-axis view/in-plane technique is suggested, while for smaller vessels, the short-axis view/out-of-plane technique is recommended. The review includes sonographic illustrations of the two techniques and surrounding arteries and nerves for the eight major veins. The aim of this review is to help clinicians assess the eight major veins and safely insert various types of catheters for patients in the prone position.

Background: Central venous oxygen saturation (ScvO2) obtained from a central venous catheter (CVC) is often used to approximate oxygen delivery in critically ill patients. Despite their importance in administering medications and monitoring oxygen delivery, the use of CVCs can be associated with significant complications. Midline catheters are inserted via a peripheral vein above the antecubital fossa and provide a safe alternative to CVCs. This study aimed to determine the equivalence of ScvO2 and midline catheter oxygen saturation (SmO2) in critically ill patients.

Methods: This was a single-center observational study of critically ill adult patients who had concurrently placed CVCs (internal jugular and subclavian) and midline catheters as part of standard ICU care. Venous oxygen saturation and lactate levels were measured from both catheters using the Abbott point-of-care i-STAT analyzer. Demographic and ICU admission data were collected. Continuous variables were compared using the paired t-test. Pearson's correlation was used to evaluate the linear correlation between ScvO2 and SmO2. The systematic error (bias) was calculated using Bland-Altman analysis. Receiver operating characteristic curves were constructed to evaluate the sensitivities and specificities for different values of SmO2 to predict ScvO2.

Results: Forty-eight patients (n = 48) were enrolled in the study. The mean ScvO2 and SmO2 were 65.5% +/- 11.2% and 62.7% +/- 17.6% respectively (p = 0.1197). In the Bland-Altman analysis, the mean bias between ScvO2 and SmO2 was 2.8% +/- 12.3% with 95% limits of agreement of -21.3% to 26.9%. More than 60% of the ScvO2 and SmO2 values diverged by ≥ 5%.

Conclusions: The difference between the mean SmO2 and ScvO2 was not statistically significant and the mean bias between SmO2 and ScvO2 is low. Despite this, the substantially large standard deviation and limits of agreement preclude the use of SmO2 as a direct surrogate of ScvO2.

Background: Timely patient and family communication is fundamental to the delivery of patient and family-centered care in the intensive care unit (ICU). However, repetitive, non-urgent communication with patients and designated patient contacts (DPCs) may lead to workflow disruptions, patient safety concerns and burnout. Implementing media-rich, educational content via a web-app could promote a more communication-friendly environment and reduce redundant communication. This may lower workflow disruptions and save time for more meaningful interactions with providers. The goal of this study was to deliver relevant, high-quality content via a web-app, assess time savings, and patient satisfaction with the web-app. Methods: A pre-implementation survey was distributed to Neurosciences intensive care unit (NSICU) staff to assess the burden of repetitive non-urgent communication and perceived duration of disruptions. Patients admitted to the NSICU from September 2022 to February 2023, n = 221 were included in the study. Patients were enrolled in the web-app. Patients and their DPC were granted access. Demographics including patient diagnosis, age, gender, and race were collected, along with data on weekly patient enrollment, number of DPCs granted access, total, frequency, and average view times of each piece of web-app content, and expected time saved due to review of web-app-based content by patient and/or DPCs to reduce repetitive communication by NSICU caregivers. The time saved for each piece of web-app content was calculated after getting feedback from providers (attendings, fellows, advanced practice providers, nurses) for how long it generally took them to convey each piece of information to patients and families. Results: Based on web-app content reviewed by patients and/or DPCs, the estimated average amount of NSICU caregiver time saved over the study period, based on application content views, was 82 min per week, and the cumulative total provider time saved for all content views was 26 h and 53 min. Twenty-one of 59 applications were rated by patients or their DPC and received five-star reviews (out of 5). Conclusion: The implementation of a web-app to facilitate and increase efficiency in communication leads to time savings for NSICU providers and patient/DPC satisfaction with the media-rich educational content.

Background: Patients in the intensive care unit (ICU) often experience poor sleep quality. Pharmacologic sleep aids are frequently used as primary or adjunctive therapy to improve sleep, although their benefits in the ICU remain uncertain. This review aims to provide a comprehensive assessment of the objective and subjective effects of medications used for sleep in the ICU, as well as their adverse effects. Methods: PubMed, Web of Science, Scopus, Embase, and Cochrane Central Register of Controlled Trials were systematically searched from their inception until June 2023 for comparative studies assessing the effects of pharmacologic sleep aids on objective and subjective metrics of sleep. Results: Thirty-four studies with 3498 participants were included. Medications evaluated were melatonin, ramelteon, suvorexant, propofol, and dexmedetomidine. The majority of studies were randomized controlled trials. Melatonin and dexmedetomidine were the best studied agents. Objective sleep metrics included polysomnography (PSG), electroencephalography (EEG), bispectral index, and actigraphy. Subjective outcome measures included patient questionnaires and nursing observations. Evidence for melatonin as a sleep aid in the ICU was mixed but largely not supportive for improving sleep. Evidence for ramelteon, suvorexant, and propofol was too limited to offer definitive recommendations. Both objective and subjective data supported dexmedetomidine as an effective sleep aid in the ICU, with PSG/EEG in 303 ICU patients demonstrating increased sleep duration and efficiency, decreased arousal index, decreased percentage of stage N1 sleep, and increased absolute and percentage of stage N2 sleep. Mild bradycardia and hypotension were reported as side effects of dexmedetomidine, whereas the other medications were reported to be safe. Several ongoing studies have not yet been published, mostly on melatonin and dexmedetomidine. Conclusions: While definitive conclusions cannot be made for most medications, dexmedetomidine improved sleep quantity and quality in the ICU. These benefits need to be balanced with possible hemodynamic side effects.

Objective: This study's purpose is to better understand pediatric intensive care nursing perspectives on sedative management as a precursor to improving aspects of sedation assessment, titration, and communication. Methods/Design: We queried nurses in the pediatric intensive care unit at a 40+ bed quaternary care using an electronic survey about their experiences with sedation management. Data was collected using REDCap and statistical analyses were performed to assess for differences between experience levels in areas. Results: Seventy nurses responded with 42% response rate. More than 95% were comfortable calculating sedation and delirium scores. Those with less than 5 years' experience were significantly more likely to consider sedation scores helpful (P = .04) and also significant more likely to agree that delirium scores are used effectively (P = .01). Eighty-eight percent of respondents were comfortable raising concerns about sedation to the multidisciplinary team, but those with less than 5 years' experience were significantly less likely to express concerns to attending (P = .001). Conclusion: Newer nurses are more inclined to support use of standardized scoring systems for sedation and delirium, but less comfortable approaching attending clinicians with their concerns. Intensive care teams should pay careful attention to team dynamics, particularly as they apply to sedative management and work to improve communication, collaboration, and educational interventions to improve patient care. Further work understanding nursing perspectives and further attempts to improve interprofessional communication seems a wise investment and could obviate barriers that may exist.

Venous obstructions and thrombosis can present diagnostic challenges due to their varied presentations and potential for significant complications if untreated. Pulse wave doppler ultrasound via identification of damping or loss of cardiac pulsatility and/ or respiratory phasicity of venous waveforms serves as a practical, noninvasive, fast, and efficient diagnostic tool for identifying venous obstructions in the presence of compressible veins beyond the point of evaluation.We present two cases demonstrating the effectiveness of pulse wave doppler ultrasound in identifying significant and life-threatening venous obstructions. The first case involves a 68-year-old male with an incidental finding of a compressible left subclavian vein showing a monophasic waveform. Further investigation revealed significant compression of the left brachiocephalic vein by an aortic arch aneurysm. The second case describes a 65-year-old male with a compressible right femoral vein but a monophasic waveform, leading to the discovery of extensive thrombosis from the iliac veins to the inferior vena cava. This series proposes to always assess cardiac pulsatility and respiratory phasicity during doppler ultrasound procedure such as thyroid ultrasounds, deep vein thrombosis (DVT) evaluations, and pre-central vein catheterizations for identifying any venous obstructions, whether they are intrinsic or extrinsic, and for reducing the risk of thromboembolic complications.

Background: Reports have described increased sedation requirements in patients with acute respiratory distress syndrome (ARDS) while on extracorporeal membrane oxygenation (ECMO) and for intubated COVID-19 patients. Thus, the objective of this study was to assess the analgosedation requirements of COVID-19 patients receiving ECMO compared to non-COVID-19 ECMO patients.

Methods: This retrospective, observational cohort study included adult patients with ARDS requiring venovenous or venopulmonary arterial ECMO admitted to a single intensive care unit from January 2017 to December 2021. Patients were categorized as COVID-19 ECMO or non-COVID-19 ECMO. The primary outcome was median daily dosing of parenteral analgosedative medications. Pertinent secondary outcomes included incidence of extubation or tracheostomy and change in sedation following tracheostomy or addition of oral agents.

Results: A total of 109 patients were evaluated; 63 COVID-19 ECMO patients and 46 non-COVID ECMO patients. The primary outcome was statistically higher in the COVID-19 compared to non-COVID-19 patients for propofol (4131.0 mg vs 2704.8 mg, P < .001), dexmedetomidine (1581.4 mcg vs 1081.3 mcg, P  =  .016), and parenteral morphine equivalents ([PME], 209.3 mg vs 154.1 mg, P  =  .027), but only propofol remained significant after adjustment for weight (31.1 mcg/kg/day vs 37.7 mcg/kg/day, P  =  .014). COVID-19 was significantly associated with increased propofol and PME requirements after adjustment for confounders on linear regression analysis. COVID-19 patients had more days with non-zero dose for propofol (8 days vs 7 days), dexmedetomidine (13 days vs 8.5 days), and PME (17 days vs 8.5 days). The only interventions that were associated with reductions in propofol dose were tracheostomy and antipsychotics.

Conclusions: COVID-19 patients on ECMO had significantly longer durations and higher doses of propofol, dexmedetomidine, and parenteral opioids over the first 28 days of cannulation. The only interventions that were associated with statistical reductions in propofol were antipsychotics and tracheostomy.

Background: Propofol, a commonly used agent for short- and long-term sedation, is associated with acute pancreatitis. The main indirect mechanism of propofol-associated acute pancreatitis is by inducing hypertriglyceridemia. Patients with severe coronavirus disease 2019 (COVID-19) pneumonia often require prolonged mechanical ventilation and sedation. We examined the incidence rate of acute pancreatitis among critically ill adults with COVID-19 pneumonia on mechanical ventilation receiving propofol. In addition, we attempted to determine cutoff levels of serum triglycerides and doses of propofol that are predictive of propofol-associated acute pancreatitis.

Methods: This was a multicenter retrospective cohort study using a large dataset of hospitalized patients with COVID-19. The collected data included the number of days on propofol, cumulative doses of propofol, peak levels of serum triglycerides, serum lipase levels, and abdominal imaging findings. We used receiver-operating characteristic analysis in conjunction with Youden's index to identify the optimal thresholds for propofol administration parameters and levels of triglycerides that would provide maximal sensitivity and specificity for predicting acute pancreatitis.

Results: Out of 499 critically ill patients with COVID-19 pneumonia, 154 met the inclusion criteria. Six (4%) patients had suspected acute pancreatitis based on elevated serum lipase levels. Cutoff values greater than 688 mg/dL for peak level of triglycerides, 4.5 days on propofol, 3007 mg/day for average daily propofol dose, and 24 113 mg for cumulative propofol dose were associated with high risk of suspected acute pancreatitis. The negative predictive values for suspected acute pancreatitis using these cutoffs ranged from 98% to 100%.

Conclusions: Propofol use in critically ill COVID-19 patients is associated with a low incidence rate of acute pancreatitis. We identified cutoff values for serum triglycerides and cumulative propofol dose that are linked to higher risk of propofol-associated pancreatitis. More research is needed to examine the true incidence of propofol-associated pancreatitis and help develop optimal cutoff values for certain parameters to help guide safe propofol administration.