Adult Intensive Care Unit Beds Research Articles

Trends in COVID-19 Inpatient Cases and Hospital Capacities during the Emergence of the Omicron Variant in the United States

Introduction: The purpose of this study was to analyze hospital capacities in terms of hospital beds and staffing in the United States and explore the trends of hospital capacities during the Omicron variant emergence. Methods: Using data collected by the United States Department of Health and Human Services, this study examined hospitalization rates from 15 December 2021 to 13 February 2022. Graphical trends were plotted for visualization of hospital bed usage and coronavirus disease 2019 (COVID-19) inpatient cases. A Pearson correlation test was used to explore the relationship between critical staffing shortage and COVID-19 death cases. Descriptive statistics of all hospital data were calculated. Results: At the peak of the Omicron variant surge, approximately one-third of the adult intensive care unit beds were used for COVID-19 patients in the United States. The total number of COVID-19 death cases increased as the number of hospitals with critical staffing shortages increased (p < 0.05). Discussion: This study can inform hospital administrators and public health policymakers on how to modify the use of existing hospital and human resources as the continually evolving pandemic taxes hospital capacity. Future studies need to be conducted to determine the long-term trend and how the COVID-19 pandemic continues to change rapidly.

Adjusting vasopressin availability and formulation: A cost-savings initiative.

The increase in vasopressin price has required many healthcare systems to consider cost-saving strategies. To combat rising medication costs, our institution changed formulations from 50 units/250 mL to 20 units/100 mL and removed vasopressin from automated dispensing cabinets (ADCs). This retrospective review occurred at a 545-bed academic medical center with 97 adult intensive care unit beds. Adult patients receiving a continuous vasopressin infusion were included with no exclusion criteria. A 1-month period was assessed before and after changing the formulation (pre and post groups, respectively). Duplicate bags compounded by pharmacy and bedside teams were also assessed in the pre group. The primary outcome was the estimated annual cost savings due to formulation change with a secondary outcome of estimated annual cost savings due to removal of vasopressin from ADCs. Each 20-unit vial of vasopressin cost $183.21 (wholesale acquisition cost) at the time of the study. In the pre group, 39 patients requiring a vasopressin infusion were allocated an average of 2 bags each costing $1,099.26 per patient. In the post group, 41 patients required an average of 4 bags each costing $732.84 per patient. With respect to the primary outcome, a savings of $366.42 per patient and an average of 40 patients per month would lead to an annual cost savings of $175,881.60. Secondary outcome analysis identified 9 duplicate bags prepared in the pre group; therefore, removal of vasopressin from ADCs is estimated to provide additional cost savings of $59,360.04. The estimated annual cost savings from both initiatives is $235,241.64. Changing the vasopressin formulation and removing it from ADCs resulted in a significant cost savings to the health system.

Who is going to turn on the ventilators?

ABSTRACTObjective To analyze the COVID-19 pandemic in Brazil, a continental-sized country, considered as an emerging economy but with several regional nuances, focusing on the availability of human resources, especially for intensive care units.Methods The database of the National Registry of Health Facilities was accessed. Healthcare professionals in the care of COVID-19 were georeferenced. We correlated the number of professionals with the parameters used by the World Health Organization. According to the Brazilian Intensive Care Medicine Association, we correlated the data for adult intensive care unit beds in each state with the number of professionals for each ten intensive care unit beds. The number of professionals, beds, and cases were then organized by state.Results The number of physicians per 100 thousand inhabitants followed the World Health Organization recommendations; however, the number of nurses did not. The number of intensivists, registered nurses, nurse technicians specialized in intensive care, and respiratory therapists, necessary for every ten intensive care beds, was not enough for any of these professional categories. A complete team of critical care specialists was available for 10% of intensive care unit beds in Brazil.Conclusion There is a shortage of professionals for intensive care unit, as we demonstrated for Brazil. Intensive care physical resources to be efficiently used require extremely specialized human resources; therefore, planning human resources is just as crucial as planning physical and structural resources.

Short and long term impact of combining restrictive and enabling interventions to reduce aztreonam consumption in a community hospital.

Background Antimicrobial stewardship initiatives combining restrictive and enabling components may be an effective strategy to achieve short- and long-term objectives. Aztreonam, a relatively high-cost antipseudomonal antibiotic, is an appropriate target for stewardship initiatives based on propensity for overuse in penicillin allergy, an activity profile often warranting additional empiric gram-negative and gram-positive coverage, and a unique durability to Ambler class B metallo-beta-lactamases. Objective Analyze the immediate and long-term impact on aztreonam prescribing of combining restrictive and enabling interventions. Setting Single 233-bed community hospital with 45 adult intensive care unit beds in Nashville, Tennessee. Method Retrospective, interrupted time series analysis comparing all patients receiving aztreonam prior to intervention between January 1, 2010 and September 30, 2011 and following intervention between October 1, 2011 and September 30, 2019. Quarterly defined daily doses/1000 adjusted patient days and microbiology laboratory annual surveillance data were utilized for analysis. Main outcome measure Post-intervention change in trend of aztreonam consumption. Results Following intervention, a significant decline in aztreonam consumption was observed (− 1.97 defined daily doses/1000 adjusted patient days; p = 0.003) resulting in a sustained decrease in aztreonam consumption from 2011 (3rd quarter) to 2019 (3rd quarter) from 15.2 to 0.26 defined daily doses/1000 adjusted patient days. Short-term group 2 carbapenem consumption increased (p = 0.044). Pseudomonas aeruginosa susceptibility to aztreonam improved from 2011 to 2018 (72% vs. 84%; p = 0.0004) without deleterious effects to alternative antipseudomonal beta-lactams. Conclusion Combining restrictive and enabling interventions had immediate and sustained impact on aztreonam consumption with P. aeruginosa susceptibility improvement.

Alternative cardiac intensive care unit locations during the COVID-19 pandemic at an academic medical center

Alternative cardiac intensive care unit locations during the COVID-19 pandemic at an academic medical center

Characteristics and outcomes of patients with COVID-19 admitted to the ICU in a university hospital in São Paulo, Brazil - study protocol

OBJECTIVES:We designed a cohort study to describe characteristics and outcomes of patients with coronavirus disease (COVID-19) admitted to the intensive care unit (ICU) in the largest public hospital in Sao Paulo, Brazil, as Latin America becomes the epicenter of the pandemic.METHODS:This is the protocol for a study being conducted at an academic hospital in Brazil with 300 adult ICU beds dedicated to COVID-19 patients. We will include adult patients admitted to the ICU with suspected or confirmed COVID-19 during the study period. The main outcome is ICU survival at 28 days. Data will be collected prospectively and retrospectively by trained investigators from the hospital’s electronic medical records, using an electronic data capture tool. We will collect data on demographics, comorbidities, severity of disease, and laboratorial test results at admission. Information on the need for advanced life support and ventilator parameters will be collected during ICU stay. Patients will be followed up for 28 days in the ICU and 60 days in the hospital. We will plot Kaplan-Meier curves to estimate ICU and hospital survival and perform survival analysis using the Cox proportional hazards model to identify the main risk factors for mortality. ClinicalTrials.gov: NCT04378582.RESULTS:We expect to include a large sample of patients with COVID-19 admitted to the ICU and to be able to provide data on admission characteristics, use of advanced life support, ICU survival at 28 days, and hospital survival at 60 days.CONCLUSIONS:This study will provide epidemiological data about critically ill patients with COVID-19 in Brazil, which could inform health policy and resource allocation in low- and middle-income countries.

Planning and understanding the intensive care network in the State of Rio de Janeiro (RJ), Brazil: a complex societal problem.

ObjectivesTo determine the optimal number of adult intensive care unit beds to reduce patient's queue waiting time and to propose policy strategies.MethodsMultimethodological approach: (a) quantitative time series and queueing theory were used to predict the demand and estimate intensive care unit beds in different scenarios; (b) qualitative focus group and content analysis were used to explore physicians' attitudes and provide insights into their behaviors and belief-driven healthcare delivery changes.ResultsA total of 33,101 requests for 268 regulated intensive care unit beds in one year resulted in 25% admissions, 55% queue abandonment and 20% deaths. Maintaining current intensive care unit arrival and exit rates, there would need 628 beds to ensure a maximum wait time of six hours. A reduction of the current abandonment rates due to clinical improvement or the average intensive care unit length of stay would decrease the number of beds to 471 and 366, respectively. If both were reduced, the number would reach 275 beds. The interviews generated 3 main themes: (1) the doctor's conflict: fair, legal, ethical and shared priorities in the decision-making process; (2) a failure of access: invisible queues and a lack of infrastructure; and (3) societal drama: deterioration of public policies and health care networks.ConclusionThe queue should be treated as a complex societal problem with a multifactorial origin requiring integrated solutions. Improving intensive care unit protocols and reengineering the general wards may decrease the length of stay. It is essential to redefine and consolidate the regulatory centers to organize the queue and provide available resources in a timely manner, by using priority criteria, working with stakeholders to guarantee clinical governance and network organization.

Doubling Pharmacist Coverage in the Intensive Care Unit: Impact on the Pharmacists' Clinical Activities and Team Members' Satisfaction.

Background: National professional organizations have recognized pharmacists as essential members of the intensive care unit (ICU) team. Critical care pharmacists' clinical activities have been categorized as fundamental, desirable, and optimal, providing a structure for gauging ICU pharmacy services being provided. Objective: To determine the impact the addition of a second ICU pharmacist covering 30 adult ICU beds at a large regional medical center has on the complexity of pharmacists' interventions, the types of clinical activities performed by the pharmacists, and the ICU team members' satisfaction. Methods: A prospective mixed-method descriptive study was conducted. Pharmacists recorded their interventions and clinical activities performed. A focus group composed of randomly selected ICU team members was held to qualitatively describe the impact of the additional pharmacist coverage on patient care, team dynamics, and pharmacy services provided. Results: The baseline period consisted of 33 days, and the intervention period consisted of 20 days. The average complexity of interventions was 1.72 during the baseline period (mode = 2) versus 1.69 (mode = 2) during the intervention period. The number of desirable and optimal clinical activities performed daily increased during the intervention from 8.4 (n = 279) to 16.4 (n = 328) and 2.3 (n = 75) to 8.6 (n = 171) compared with the baseline, respectively. Focus group members qualitatively described additional pharmacist coverage as beneficial. Conclusion: The additional critical care pharmacist did not increase pharmacy intervention complexity; however, more interventions were performed per day. Additional pharmacist coverage increased the daily number of desirable and optimal clinical activities performed and positively impacted ICU team members' satisfaction.

The impact of windows on the outcomes of medical intensive care unit patients

Summary Backgrounds The knowledge about the window effect on the outcomes of intensive care unit (ICU) patients remains limited and uncertain. This retrospective study investigated the impact of windows on the outcomes of patients admitted to the medical ICU. Methods It was conducted in a medical ICU with 14 adult ICU beds including 7 window and 7 no-window rooms. The outcomes including length of ICU stay, in-ICU mortality and in-hospital mortality were measured. Results During the study period, a total of 281 patients were admitted to the ICU, with 126 patients in window rooms and 155 in no-window rooms. These two groups of patients had similar clinical characteristics such as age, gender, disease severity, consciousness level, underlying diseases, and incidence of organ failure (all p > 0.05). Additionally, the incidence of delirium (37.3% vs 38.7%, p = 0.907), use of sedatives (50.0% vs 51.0%, p = 0.963), and use of antipsychotic agents (18.3% vs 18.7%, p = 0.945) were the same between these the window and no-window groups. The in-ICU and in-hospital mortality rates were not significantly different between groups (23.8% vs 20.0%, p = 0.533 for in-ICU mortality; 27.0% vs 24.5%, p = 0.734 for in-hospital mortality), but patients admitted to window rooms had shorter ICU stays than those admitted to no-window rooms (4.8 days vs 5.8 days, p = 0.045). Conclusions We demonstrated that ICU rooms with windows are associated with shorter ICU stays than those without windows, suggesting that windows may be important in medical ICU rooms.

Association between advanced practice nursing and 30-day mortality in mechanically ventilated critically ill patients: A retrospective cohort study

PurposeLittle is known about the association between advanced practice nursing and mortality. The aim of this study was to evaluate whether the presence of advanced practice nurses (APN), that is, certified nurse (CN) and certified nurse specialist (CNS) in intensive care, is associated with 30-day mortality for mechanically ventilated critically ill patients. Materials and methodsUsing a Japanese national in-patient database, we identified 45,620 patients who were admitted to an intensive care unit (ICU) and received mechanical ventilation within 2 days of hospital admission between 1 April 2014 and 31 March 2015. We assessed the association between the number of CN/CNSs per 10 adult ICU beds and 30-day mortality. ResultsWe examined 8955 patients in 134 hospitals without CN/CNSs and 36,665 in 284 hospitals with CN/CNSs. Overall, the number of CN/CNSs per 10 adult ICU beds ranged from 0 to 7.5. In the multivariable analysis, the number of CN/CNSs per 10 adult ICU beds was significantly associated with a reduction in 30-day mortality (adjusted odds ratio 0.97; 95% confidence interval, 0.94–1.00; P=0.023). ConclusionsOur findings show that APNs may play an important role in improving patient outcome in the adult ICU.

A Nationwide Census of ICU Capacity and Admissions in Mongolia.

In Mongolia, a Central Asian lower-middle income country, intensive care medicine is an under-resourced and–developed medical specialty. The burden of critical illness and capacity of intensive care unit (ICU) services in the country is unknown. In this nationwide census, we collected data on adult and pediatric/neonatal ICU capacities and the number of ICU admissions in 2014. All hospitals registered to run an ICU service in Mongolia were surveyed. Data on the availability of an adult and/or pediatric/neonatal ICU service, the number of available ICU beds, the number of available functional mechanical ventilators, the number of patients admitted to the ICU, and the number of patients admitted to the study hospital were collected. In total, 70 ICUs with 349 ICU beds were counted in Mongolia (11.7 ICU beds/100,000 inhabitants; 1.7 ICU beds/100 hospital beds). Of these, 241 (69%) were adult and 108 (31%) pediatric/neonatal ICU beds. Functional mechanical ventilators were available for approximately half of the ICU beds (5.1 mechanical ventilators/100,000 inhabitants). While all provincial hospitals ran a pediatric/neonatal ICU, only dedicated pediatric hospitals in Ulaanbaatar did so. The number of adult and pediatric/neonatal ICU admissions varied between provinces. The number of adult ICU beds and adult ICU admissions per 100,000 inhabitants correlated (r = 0.5; p = 0.02), while the number of pediatric/neonatal ICU beds and pediatric/neonatal ICU admissions per 100,000 inhabitants did not (r = 0.25; p = 0.26). In conclusion, with 11.7 ICU beds per 100,000 inhabitants the ICU capacity in Mongolia is higher than in other low- and lower-middle-income countries. Substantial heterogeneities in the standardized ICU capacity and ICU admissions exist between Mongolian provinces. Functional mechanical ventilators are available for only half of the ICU beds. Pediatric/neonatal ICU beds make up one third of the national ICU capacity and appear to meet or even exceed the demand of pediatric/neonatal critical care.

The outcomes of patients with severe dengue admitted to intensive care units.

Outcomes of adult patients with dengue infections requiring intensive care unit (ICU) admissions remain unclear. We assessed the clinical manifestations and prognostic factors of patients critically ill with severe dengue.This retrospective study was done in a tertiary referral hospital with 96 adult ICU beds. All of the patients with laboratory-confirmed severe dengue infections and admitted to the ICU were enrolled between July 31 and November 31, 2015, during the large outbreak period. The medical records of all the recruited patients were reviewed for the following information: age, gender, clinical manifestations, disease severity scores, underlying conditions, laboratory examinations, and outcomes. The primary endpoint was to find the predictors of ICU mortality.During the study period, 4787 patients with dengue infections required ICU admission. One hundred forty-three (2.99%) were critically ill (mean age: 69.7 years). Hypertension (n = 90, 62.9%) and diabetes mellitus (n = 70, 49.0%) were the 2 most common underlying diseases. Eighty critically ill patients (55.9%) had cobacterial infections, and 33 had cobacteremia. The hematologic system failed most often, followed by thoracic and cardiovascular systems. Fever was the most common presentation (n = 112; 78.3%), followed by anorexia (n = 47; 32.9%) and abdominal pain (n = 46; 32.2%). Overall, 33 patients died (mortality rate: 23.1%). Multivariate analysis showed that ICU mortality was significantly associated with lower Glasgow Coma Scale (GCS) scores, lower platelet counts before ICU discharge, and more organ failures.The number of severe dengue patients who require ICU admission remains high. The mortality rate was associated with lower GCS scores, lower platelet counts, and more organ failures. In addition, more than half of the critically ill dengue patients had comorbid bacterial infections.

Unmet quality indicators for metastatic cancer patients admitted to intensive care unit in the last two weeks of life.

The majority of U.S. cancer patients express the desire to die at home, though most do not, and are often subjected to ineffective therapies near the end of life (EOL). In 2008 the U.K. Department of Health and National Health Care Service implemented a set of 10 quality markers to improve EOL care (EOLC) for seriously ill persons. Data show that this intervention has had a positive impact on patients' EOLC. The study assessed the quality of EOLC received by terminally ill cancer patients admitted to the intensive care unit (ICU) in the last two weeks of life. A retrospective chart review was done of the electronic medical record (EMR) of 2498 patients admitted to the ICU from January to August 2011. The six U.K. quality indicators pertaining to patients were used to assess quality of EOLC. The setting was a tertiary academic medical center with 663 beds and 66 adult ICU beds in northern California. EMR analysis identified 2498 patients admitted to the ICU during the study period--232 died within two weeks of admission. Sixty-nine decedents had metastatic cancer. Of the patients, 58% were male, average age 59.8 years (range 25-91). Quality indicators were met in a relatively small percentage of patients admitted to the ICU in the last two weeks of life: prognostication 67%, advance care planning 32%, goals of care 42%, caregiver needs 0%, coordination of care across organizational boundaries 7%, and standardized care pathway implementation 58%. Palliative care consultations occurred in 28 patients. Quality indicators for EOLC were unmet in cancer patients admitted to the ICU in the last two weeks of life. Hospital-wide provider education about the need for early advance care planning with all seriously ill patients has been implemented in an effort to improve quality of care at EOL.

Unmet Quality Indicators of Care for Metastatic Cancer Patients Admitted to ICU in Last 2 Weeks of Life (S710)

1.Understand the current quality of end-of-life care provided to patients with advanced cancer admitted to the ICU at our academic medical center.2.Discuss mechanisms to improve end-of-life care for patients with advanced cancer.3.Evaluate what barriers prevented palliative care consultation to significantly improve the quality of end-of-life care metastatic cancer patients receive. Evidence indicates that terminally ill cancer patients are subjected to ineffective treatments and do not receive quality care at the end of life. We wanted to gain a better understanding of the quality of end of life care (EOLC) received by terminally ill cancer patients admitted to the Intensive Care Unit (ICU) in the last 2 weeks of life. The established UK Quality Indicators were used to evaluate quality of care. Design: A retrospective chart review of the electronic medical records (EMR) of patients admitted to the ICU from January-August 2011 was completed. Six UK quality indicators (prognostication, advanced care planning, goals of care, caregiver needs, coordinated care across organizational boundaries, and standardized care pathway implementation) were used to assess quality of EOLC. Setting: Tertiary academic medical center with 663 beds and 66 adult ICU beds in Northern California, USA. Patients: 2498 patients were admitted to the ICU, 232 died within two weeks of admission; 69 of these patients died of metastatic cancer. 58% patients were male; average age 59.8 years (range 25-91). Quality indicators were met in a relatively small percentage of patients (prognostication 67%, advanced care planning 32%, goals of care 42%, caregiver needs 0%, coordination of care across organizational boundaries 7%, standardized care pathway implementation 58%) admitted to the ICU in the last 2 weeks of life. Palliative care consultations occurred in 28 of the 69 patients and resulted in increased POLST documentation. Quality indicators for EOLC were not met for majority of patients with advanced cancer admitted to the ICU. Earlier discussions with patients and families regarding their goals of care and preferred venue of death may help improve quality of care at EOL.

National intensive care unit bed capacity and ICU patient characteristics in a low income country

BackgroundPrimary health care delivery in the developing world faces many challenges. Priority setting favours HIV, TB and malaria interventions. Little is known about the challenges faced in this setting with regard to critical care medicine. The aim of this study was to analyse and categorise the diagnosis and outcomes of 1,774 patients admitted to a hospital intensive care unit (ICU) in a low-income country over a 7-year period. We also assessed the country’s ICU bed capacity and described the challenges faced in dealing with critically ill patients in this setting.FindingsA retrospective audit was conducted in a general ICU in a university hospital in Uganda. Demographic data, admission diagnosis, and ICU length of stay were recorded for the 1,774 patients who presented to the ICU in the period January 2003 to December 2009. Their mean age was 35.5 years. Males accounted for 56.5% of the study population; 92.8% were indigenous, and 42.9% were referrals from upcountry units. The average mortality rate over the study period was 40.1% (n = 715). The highest mortality rate (44%) was recorded in 2004 and the lowest (33.2%) in 2005. Children accounted for 11.6% of admissions (40.1% mortality). Sepsis, ARDS, traumatic brain injuries and HIV related conditions were the most frequent admission diagnoses. A telephonic survey determined that there are 33 adult ICU beds in the whole country.ConclusionsMortality was 40.1%, with sepsis, head injury, acute lung injury and HIV/AIDS the most common admission diagnoses. The country has a very low ICU bed capacity. Prioritising infectious diseases poses a challenge to ensuring that critical care is an essential part of the health care package in Uganda.

Variation in critical care services across North America and Western Europe*

Critical care represents a large percentage of healthcare spending in developed countries. Yet, little is known regarding international variation in critical care services. We sought to understand differences in critical care delivery by comparing data on the distribution of services in eight countries. Retrospective review of existing national administrative data. We identified sources of data in each country to provide information on acute care hospitals and beds, intensive care units and beds, intensive care admissions, and definitions of intensive care beds. Data were all referenced and from as close to 2005 as possible. United States, France, United Kingdom, Canada, Belgium, Germany, The Netherlands, and Spain. Not available. None. No standard definition existed for acute care hospital or intensive care unit beds across countries. Hospital beds varied three-fold from 221/100,000 population in the United States to 593/100,000 in Germany. Adult intensive care unit beds also ranged seven-fold from 3.3/100,000 population in the United Kingdom to 24.0/100,000 in Germany. Volume of intensive care unit admissions per year varied ten-fold from 216/100,000 population in the United Kingdom to 2353/100,000 in Germany. The ratio of intensive care unit beds to hospital beds was highly correlated across all countries except the United States (r = .90). There was minimal correlation between the number of intensive care unit beds per capita and health care spending per capita (r = .45), but high inverse correlation between intensive care unit beds and hospital mortality for intensive care unit patients across countries (r = -.82). Absolute critical care services vary dramatically between countries with wide differences in both numbers of beds and volume of admissions. The number of intensive care unit beds per capita is not strongly correlated with overall health expenditure, but does correlate strongly with mortality. These findings demonstrate the need for critical care data from all countries, as they are essential for interpretation of studies, and policy decisions regarding critical care services.

Incidence of acute lung injury in the United States.

Recent estimates of acute respiratory distress syndrome (ARDS) incidence have varied from 1.3 to 22 per 100,000 person years (105 person.years); the incidence of acute lung injury (ALI) has varied from 17.9 to 34 cases per 105 person.years. Potential reasons for this wide range include differences in the definition of the syndrome, in the populations sampled, and in the assumptions made to estimate incidence. We hypothesized that careful, prospective, protocol-driven case identification that included the milder hypoxemia criterion for ALI would yield incidence numbers greater than previously reported. Prospective cohort study with extrapolation to the U.S. population. National Heart, Lung, and Blood Institute-sponsored ARDS Network composed of 20 hospitals. As part of the National Institutes of Health-sponsored ARDS network, 20 hospitals prospectively identified patients with ALI from 1996 to 1999. Screening logs from this study were used to estimate ALI rates per intensive care unit (ICU) bed per year. We used the registry and data from the American Hospital Association to estimate the incidence of ALI in the United States. None. The ALI per ICU bed incidence in the ARDS network registry varied from 0.7 to 5.8 cases of ALI per ICU bed per year with an average of 2.2 cases of ALI per ICU bed per year. We tested the robustness of the incidence estimate by performing a variety of sensitivity analyses. When we used the conservative assumptions that the ARDS network screening logs were complete at each of the participating hospitals and that ALI cases are limited to academic hospitals with > or =20 adult ICU beds, the incidence of ALI in adults in the United States is 22.4 cases per 105 person.years. Under the less conservative assumption that ALI cases occurred only at hospitals with > or =20 ICU beds, regardless of their academic status, the incidence of ALI in the United States is estimated at 64.2 cases per 105 person.years. Based on this analysis, which used prospective clinical trial screening data and conservative assumptions about where patients with ALI are cared for, the incidence of ALI in the United States appears to be higher than previously reported.

Loss of Antimicrobial Susceptibility in Aerobic Gram-Negative Bacilli Repeatedly Isolated From Patients in Intensive-Care Units

AbstractObjective:To study the loss of antimicrobial susceptibility in repeat (same patient, same bacterial species, and same site) aerobic gram-negative bacilli (AGNB) isolated from individual patients during their stay in the intensive-care unit (ICU).Setting:A 792-bed, tertiary-care community hospital with a total of 107 adult, pediatric, and neonatal ICU beds. METHOD: An obser vational prospective study performed November 1992 through mid-July 1993.Results:Of 594 consecutive AGNB from 287 ICU patients, 117 isolates (20%) from 55 patients (19%) were repeat isolates, with the majority obtained from respiratory secretions (83%). Pseudomonas aeruginosa and Enterobacter species accounted for 61% of the isolates. Forty-two (36%) of the repeat isolates from 24 patients (44%) had >4-fold increase in minimum inhibitory concentration to at least one antibiotic and no longer were considered fully susceptible based on National Committee on Clinical Laboratory Standards criteria. Loss of antimicrobial susceptibility often developed within several (median 8) days and was associated only infrequently with simultaneous transition from colonization to infection in the individual patient. Use of certain β-lactam antibiotics was associated with increasing resistance to several other antibiotics in the same class. Concurrent use of β-lactams and aminoglycosides did not prevent loss of antimicrobial susceptibility to the former in repeat isolates.Conclusion:We conclude that loss of antimicrobial susceptibility in repeat AGNB isolated from ICU patients is common, usually is not associated with transition from colonization to infection, and often is associated with prior use of antibiotics. Minimizing antibiotic use in ICU patients should help reduce the risk of antimicrobial resistance in repeat AGNB isolates.