Peter Dodek

University of British Columbia - Vancouver, Vancouver, British Columbia, Canada

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Publications (174)908.33 Total impact

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    ABSTRACT: Many healthcare workers are concerned about the provision of nonbeneficial treatment in the acute care setting. We sought to explore the perceptions of acute care practitioners to determine whether they perceived nonbeneficial treatment to be a problem, to generate an acceptable definition of nonbeneficial treatment, to learn about their perceptions of the impact and causes of nonbeneficial treatment, and the ways that they feel could reduce or resolve nonbeneficial treatment.
    Critical care medicine. 11/2014;
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    ABSTRACT: The guideline-recommended elements to include in discussions about goals of care with patients with serious illness are mostly based on expert opinion. We sought to identify which elements are most important to patients and their families.
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    ABSTRACT: Venous thromboembolism (VTE) is a common complication of acute illness, and its prevention is a ubiquitous aspect of inpatient care. A multicenter blinded, randomized trial compared the effectiveness of the most common pharmocoprevention strategies, unfractionated heparin (UFH) and the low-molecular-weight heparin (LMWH) dalteparin, finding no difference in the primary end point of leg deep-vein thrombosis but a reduced rate of pulmonary embolus and heparin-induced thrombocytopenia among critically ill medical-surgical patients who received dalteparin.
    JAMA. 11/2014;
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    ABSTRACT: The aims of this study are to assess adherence to the Brain Trauma Foundation (BTF) cerebral perfusion pressure (CPP) guidelines and to determine if adherence is associated with mortality in patients who have a severe traumatic brain injury.
    Journal of Critical Care 07/2014; · 2.50 Impact Factor
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    ABSTRACT: Given conflicting data and current guidelines, low-dose corticosteroids are often used in the treatment of septic shock. To evaluate the therapeutic benefit of early low-dose corticosteroid in patients with septic shock.
    Critical care medicine. 07/2014;
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    ABSTRACT: Fluids and vasoactive agents are both used to treat septic shock, but little is known about how they interact or the optimal way to administer them. We sought to determine how hospital mortality was influenced by combined use of these two treatments.
    Critical Care Medicine 07/2014; · 6.12 Impact Factor
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    ABSTRACT: Sleep deprivation leads to reduced vigilance and potentially impairs work performance. Nurses may work long shifts that may contribute to sleep deprivation.
    American journal of critical care : an official publication, American Association of Critical-Care Nurses. 07/2014; 23(4):290-5.
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    ABSTRACT: Controversies regarding the process and timing of the determination of death for controlled organ donation after circulatory death persist. This study assessed the feasibility of conducting a prospective, observational study of continuous monitoring of vital signs for 30 minutes after the clinical determination of death in five Canadian ICUs. Waveform data were analyzed. Prospective observational cohort study. One pediatric and four adult Canadian ICUs. One month of age or older, admitted to the ICU, and for whom a consensual decision to withdraw life-sustaining therapies had been made, with an anticipation of imminent death. None. Invasive arterial blood pressure, electrocardiogram, and oxygen saturation plethysmography activity were recorded and reviewed for 30 minutes after declaration of death. Feasibility was assessed (recruitment, consent rate, protocol compliance, and staff satisfaction). Of 188 subjects screened over 16 months, 41 subjects were enrolled (87% consent rate). Data collection was complete for 30 subjects (73% protocol compliance). In four subjects, arterial blood pressure resumed following cessation of activity. The longest period of cessation of arterial blood pressure before resumption was 89 seconds. The duration of resumed activity ranged from 1 to 172 seconds. No cases of sustained resumption of arterial blood pressure activity were recorded, and no instances of clinical autoresuscitation were reported. In nearly all patients (27 of 30), electrocardiogram activity continued after the disappearance of arterial blood pressure. This is the first observational study to prospectively collect waveform data for 30 minutes after the declaration of death. A future larger study may support initial data suggesting that circulatory function does not resume after more than 89 seconds of absence. Furthermore, persistence of cardiac electrical activity with the documented absence of circulation may not be relevant to declaration of death.
    Critical care medicine 05/2014; · 6.37 Impact Factor
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    ABSTRACT: Rationale: Mortality due to septic shock may be determined by a systemic inflammatory response, independent of the inciting infection, but it may also be influenced by the anatomic source of infection. Objectives: To determine the association between the anatomic source of infection and hospital mortality in critically ill patients who have septic shock. Methods: This was a retrospective, multicenter cohort study of 7974 patients who had septic shock in 29 academic and community intensive care units in Canada, the United States, and Saudi Arabia from January 1989--May 2008. Measurements and main results: Subjects were assigned one of twenty anatomic sources of infection based on clinical diagnosis and/or isolation of pathogens. The primary outcome was hospital mortality. Overall crude hospital mortality was 52% (21%-85% across sources of infection). Variation in mortality remained after adjusting for year of admission, geographic source of admission, age, sex, comorbidities, community vs. hospital-acquired infection, and organism type. The source of infection with the highest standardized hospital mortality was ischemic bowel (75%); the lowest was obstructive uropathy-associated urinary tract infection (26%). Residual variation in adjusted hospital mortality was not explained by Acute Physiology and Chronic Health Evaluation II score, number of day 1 organ failures, bacteremia, appropriateness of empiric antimicrobials, or adjunct therapies. In patients who received appropriate antimicrobials after onset of hypotension, source of infection was associated with death after adjustment for both predisposing and downstream factors. Conclusions: Anatomic source of infection should be considered in future trial designs and analyses, and in development of prognostic scoring systems.
    American Journal of Respiratory and Critical Care Medicine 03/2014; · 11.04 Impact Factor
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    ABSTRACT: IMPORTANCE Critically ill patients are at risk of venous thrombosis, and therefore guidelines recommend daily thromboprophylaxis. Deep vein thrombosis (DVT) commonly occurs in the lower extremities but can occur in other sites including the head and neck, trunk, and upper extremities. The risk of nonleg deep venous thromboses (NLDVTs), predisposing factors, and the association between NLDVTs and pulmonary embolism (PE) or death are unclear. OBJECTIVE To describe the frequency, anatomical location, risk factors, management, and consequences of NLDVTs in a large cohort of medical-surgical critically ill adults. DESIGN, SETTING, AND PARTICIPANTS A nested prospective cohort study in the setting of secondary and tertiary care intensive care units (ICUs). The study population comprised 3746 patients, who were expected to remain in the ICU for at least 3 days and were enrolled in a randomized clinical trial of dalteparin vs standard heparin for thromboprophylaxis. MAIN OUTCOMES AND MEASURES The proportion of patients who had NLDVTs, the mean number per patient, and the anatomical location. We characterized NLDVTs as prevalent or incident (identified within 72 hours of ICU admission or thereafter) and whether they were catheter related or not. We used multivariable regression models to evaluate risk factors for NLDVT and to examine subsequent anticoagulant therapy, associated PE, and death. RESULTS Of 3746 trial patients, 84 (2.2%) developed 1 or more non-leg vein thromboses (superficial or deep, proximal or distal). Thromboses were more commonly incident (n = 75 [2.0%]) than prevalent (n = 9 [0.2%]) (P < .001) and more often deep (n = 67 [1.8%]) than superficial (n = 31 [0.8%]) (P < .001). Cancer was the only independent predictor of incident NLDVT (hazard ratio [HR], 2.22; 95% CI, 1.06-4.65). After adjusting for Acute Physiology and Chronic Health Evaluation (APACHE) II scores, personal or family history of venous thromboembolism, body mass index, vasopressor use, type of thromboprophylaxis, and presence of leg DVT, NLDVTs were associated with an increased risk of PE (HR, 11.83; 95% CI, 4.80-29.18). Nonleg DVTs were not associated with ICU mortality (HR, 1.09; 95% CI, 0.62-1.92) in a model adjusting for age, APACHE II, vasopressor use, mechanical ventilation, renal replacement therapy, and platelet count below 50 × 109/L. CONCLUSIONS AND RELEVANCE Despite universal heparin thromboprophylaxis, nonleg thromboses are found in 2.2% of medical-surgical critically ill patients, primarily in deep veins and proximal veins. Patients who have a malignant condition may have a significantly higher risk of developing NLDVT, and patients with NLDVT, compared with those without, appeared to be at higher risk of PE but not higher risk of death. TRIAL REGISTRATION Identifier: NCT00182143.
    JAMA Internal Medicine 03/2014; · 13.25 Impact Factor
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    ABSTRACT: Thrombocytopenia occurs in 20% to 45% of critically ill medical-surgical patients. The 4Ts heparin-induced thrombocytopenia (HIT) score (with 4 domains: Thrombocytopenia, Timing of thrombocytopenia, Thrombosis and oTher reason[s] for thrombocytopenia) might reliably identify patients at low risk for HIT. Interobserver agreement on 4Ts scoring is uncertain in this setting. To evaluate whether a published clinical prediction rule (the "4Ts score") reliably rules out HIT in "low-risk" intensive care unit (ICU) patients as assessed by research coordinators (who prospectively scored) and 2 adjudicators (who scored retrospectively) during an international heparin thromboprophylaxis trial (PROTECT, NCT00182143). Of 3746 medical-surgical ICU patients in PROTECT, 794 met the enrollment criteria for this HIT substudy. Enrollment was predicated on one of the following occurring in ICU: platelets less than 50 × 10(9)/L, platelets decreased to 50% of ICU admission value (if admission value <100 × 10(9)/L), any venous thrombosis, or if HIT was otherwise clinically suspected. Independently, 4Ts scores were completed in real time by research coordinators blinded to study drug and laboratory HIT results, and retrospectively by 2 adjudicators blinded to study drug, laboratory HIT results, and research coordinators' scores; the adjudicators arrived at consensus in all cases. Of the 763 patients, 474 had a central or local laboratory HIT test performed and had 4Ts scoring by adjudicators; 432 were scored by trained research coordinators. Heparin-induced thrombocytopenia was defined by a centrally performed positive serotonin release assay (SRA). Of the 474 patients with central adjudication, 407 (85.9%) had a 4Ts score of 3 or lower, conferring a low pretest probability (PTP) of HIT; of these, 6 (1.5% [95% confidence interval, 0.7%-3.2%) had a positive SRA. Fifty-nine (12.4%) had a moderate PTP (4Ts score of 4-5); of these, 4 (6.8%) had a positive SRA. Eight patients had a high PTP (4Ts score of ≥6); of these, 1 (12.5%) had a positive SRA. Raw agreement between research coordinators and central adjudication on each domain of the 4Ts score and low, intermediate, and high PTP was good. However, chance-corrected agreement was variable between adjudicators (weighted κ values of 0.31-0.93) and between the adjudicator consensus and research coordinators (weighted κ values of 0.13 and 0.78). Post hoc review of the 6 SRA-positive cases with an adjudicated low PTP demonstrated that their scores would have been increased if the adjudicators had had additional information on heparin exposure prior to ICU admission. In general, the fourth domain of 4Ts (oTher causes of thrombocytopenia) generated the most disagreement. Real-time 4Ts scoring by research coordinators at the time of testing for HIT was not consistent with 4Ts scores obtained by central adjudicators. The results of this comprehensive HIT testing highlight the need for further research to improve the assessment of PTP scoring of HIT for critically ill patients.
    Journal of critical care 02/2014; · 2.13 Impact Factor
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    ABSTRACT: To illustrate the complexities of assessing the influence of individual organizational factors on outcomes for intensive care unit (ICU) patients in Canada. In this cross-sectional study, we used retrospectively collected data from all patients admitted to all ICUs in British Columbia between April 01, 1994, and March 31, 1999, or to 20 ICUs in Ontario during 2002. We used responses to a survey about organizational factors for all ICUs in British Columbia and Ontario that was done in 2001. Clustered data regression models were used to assess the influence of organizational factors on outcomes after adjustment for patient-level confounders. Despite adjustment for age, sex, comorbidity score of patients, and limitation of the data sets to minimize confounding, we found variable relationships between ICU outcomes (hospital mortality, ICU length of stay, and hospital length of stay) and any of "closed" administrative model, daily rounds, presence of an ICU medical director, medical director trained in critical care medicine, presence of a nurse leader in the ICU, nurse-patient ratio, and presence of an ICU pharmacist. Closed administrative model was associated with lower hospital mortality (odds ratio [95% confidence interval]: 0.75 [0.66-0.85]), shorter length of ICU stay (rate ratio [95% confidence interval]: 0.76 [0.62-0.92]), and shorter length of hospital stay (rate ratio [5% confidence interval]: 0.78 [0.72-0.84]) in nontertiary ICUs but many other "advantageous" factors were associated with higher mortality. The lack of a consistent relationship between organizational factors and ICU outcomes, and relationships that show increased mortality associated with some advantageous factors, suggests that there is residual confounding in these relationships. Models that adjust for only conventional patient-level confounders are unlikely to provide valid estimates of the influence of organizational factors.
    Journal of Intensive Care Medicine 02/2014;
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    ABSTRACT: The objective of this study was to identify the self-reported barriers to and facilitators of prescribing low-molecular-weight heparin (LMWH) thromboprophylaxis in the intensive care unit (ICU). We conducted an interviewer-administered survey of 4 individuals per ICU (the ICU director, a bedside pharmacist, a thromboprophylaxis research coordinator, and physician site investigator) regarding LMWH thromboprophylaxis for medical-surgical patients in 27 ICUs in Canada and the United States. Items were generated by the research team and adapted from previous surveys, audits, qualitative studies, and quality improvement research. Respondents rated the barriers to LMWH use, facilitators (effectiveness, affordability, and acceptability thereof), and perceptions regarding LMWH use. Respondents had 14.5 (SD, 7.7) years of ICU experience (response rate, 99%). The 5 most common barriers in descending order were as follows: drug acquisition cost, fear of bleeding, lack of resident education, concern about bioaccumulation in renal failure, and habit. The top 5 rated facilitators were preprinted orders, education, daily reminders, audit and feedback, and local quality improvement committee endorsement. Centers using preprinted orders (mean difference [P<.01]) and computerized physician order entry (P<.01) compared with those centers not using those tools reported higher affordability for these 2 facilitators. Compared with physicians and pharmacists, research coordinators considered ICU-specific audit and feedback of thromboprophylaxis rates to be a more effective, acceptable, and affordable facilitator (odds ratio, 6.67; 95% confidence interval, 1.97-22.53; P<.01). Facilitator acceptability ratings were similar within centers but differed across centers (P≤.01). This multicenter survey found several barriers to use of LMWH including cost, concern about bleeding, and lack of resident knowledge of effectiveness. The diversity of reported facilitators suggests that large scale programs may address generic barriers but also need site-specific interprofessional knowledge translation activities.
    Journal of critical care 02/2014; · 2.13 Impact Factor
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    Canadian respiratory journal: journal of the Canadian Thoracic Society 09/2013; · 1.29 Impact Factor
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    ABSTRACT: Ventilator-associated conditions (VACs) and infection related ventilator-associated complications (iVACs) are the Centers for Disease Control and Prevention's new surveillance paradigms for mechanically ventilated patients. Little is known regarding the clinical impact and preventability of VACs and iVACs, and their relationship to ventilator associated pneumonia (VAP). We evaluated these using data from a large, multicenter quality improvement initiative. We retrospectively applied definitions for VAC and iVAC to data from a prospective time series study in which VAP clinical practice guidelines were implemented in 11 North American intensive care units (ICUs). Each ICU enrolled 30 consecutive patients mechanically ventilated >48 hours during each of 4 study periods. Data on clinical outcomes and concordance with prevention recommendations were collected. VAC, iVAC, and VAP rates over time, the agreement (kappa statistic) between definitions, associated morbidity/mortality, and independent risk factors for each were determined. Of 1320 patients, 139 (10.5%) developed a VAC, 65 (4.9%) developed an iVAC and 148 (11.2%) developed VAP. The agreement between VAP and VAC was 0.18 and between VAP and iVAC, it was 0.19. Patients who developed VAC or iVAC had significantly more ventilator days, hospital days, antibiotic days, and higher hospital mortality than patients who had neither of these conditions. Increased concordance with VAP prevention guidelines during the study was associated with decreased VAP and VAC rates but no change in iVAC rates. VACs and iVACs are associated with significant morbidity and mortality. Although the agreement between VAC, iVAC and VAP is poor, a higher adoption of measures to prevent VAP was associated with lower VAP and VAC rates.
    Chest 09/2013; · 7.13 Impact Factor
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    ABSTRACT: Abstract Objective. Operations research is the application of mathematical modeling, statistical analysis, and mathematical optimization to understand and improve processes in organizations. The objective of this study was to illustrate how the methods of operations research can be used to identify opportunities to reduce the absolute value and variability of interfacility transport intervals for critically ill patients. Methods. After linking data from two patient transport organizations in British Columbia, Canada, for all critical care transports during the calendar year 2006, the steps for transfer of critically ill patients were tabulated into a series of time intervals. Statistical modeling, root-cause analysis, Monte Carlo simulation, and sensitivity analysis were used to test the effect of changes in component intervals on overall duration and variation of transport times. Based on quality improvement principles, we focused on reducing the 75th percentile and standard deviation of these intervals. Results. We analyzed a total of 3808 ground and air transports. Constraining time spent by transport personnel at sending and receiving hospitals was projected to reduce the total time taken by 33 minutes with as much as a 20% reduction in standard deviation of these transport intervals in 75% of ground transfers. Enforcing a policy of requiring acceptance of patients who have life- or limb-threatening conditions or organ failure was projected to reduce the standard deviation of air transport time by 63 minutes and the standard deviation of ground transport time by 68 minutes. Conclusions. Based on findings from our analyses, we developed recommendations for technology renovation, personnel training, system improvement, and policy enforcement. Use of the tools of operations research identifies opportunities for improvement in a complex system of critical care transport. Key words: critical care; Monte Carlo simulation; operations research; transport.
    Prehospital Emergency Care 08/2013; 17(4):466-474. · 1.86 Impact Factor
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    ABSTRACT: Bleeding frequently complicates critical illness and may have serious consequences. Our objectives are to describe the predictors of major bleeding and the association between bleeding and mortality in medical-surgical critically ill patients receiving heparin thromboprophylaxis. We prospectively studied patients from 67 intensive care units and six countries enrolled in a thromboprophylaxis trial (NCT00182143) comparing dalteparin with unfractionated heparin. Patients with trauma, orthopedic surgery or neurosurgery were excluded. Trained research coordinators used a validated tool to document bleeding, which underwent duplicate independent blinded adjudication. Major bleeding was defined as hypovolemic shock, bleeding into critical sites, requiring an invasive intervention or transfusion of at least two units of red blood cells, or associated with hypotension or tachycardia in the absence of other causes. Adjusted Cox proportional hazard regression analysis was used to identify major bleeding predictors and the association between bleeding and mortality. Among 3,746 patients, bleeding occurred in 208 [5.6 %, 95 % confidence interval (CI) 4.9-6.3 %]. Time-dependent predictors were prolonged activated partial thromboplastin time [hazard ratio (HR) 1.10, 1.05-1.14 per 10 s increase], lower platelet count (HR 1.16, 1.09-1.24 per 50 × 10(9)/L decrease), therapeutic heparin (HR 3.26, 1.72-6.17), antiplatelet agents (HR 1.38, 1.02-1.88), renal replacement therapy (HR 1.75, 1.20-2.56), and recent surgery (HR 1.64, 1.01-2.65). Type of pharmacologic thromboprophylaxis was not associated with bleeding. Patients with bleeding had a higher risk of in-hospital death (HR 2.09, 1.69-2.57). As major bleeding has modifiable risk factors and is associated with in-hospital mortality, strategies to mitigate these factors should be evaluated in critically ill patients.
    European Journal of Intensive Care Medicine 08/2013; · 5.17 Impact Factor
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    ABSTRACT: We systematically reviewed ICU-based knowledge translation studies to assess the impact of knowledge translation interventions on processes and outcomes of care. We searched electronic databases (to July, 2010) without language restrictions and hand-searched reference lists of relevant studies and reviews. Two reviewers independently identified randomized controlled trials and observational studies comparing any ICU-based knowledge translation intervention (e.g., protocols, guidelines, and audit and feedback) to management without a knowledge translation intervention. We focused on clinical topics that were addressed in greater than or equal to five studies. Pairs of reviewers abstracted data on the clinical topic, knowledge translation intervention(s), process of care measures, and patient outcomes. For each individual or combination of knowledge translation intervention(s) addressed in greater than or equal to three studies, we summarized each study using median risk ratio for dichotomous and standardized mean difference for continuous process measures. We used random-effects models. Anticipating a small number of randomized controlled trials, our primary meta-analyses included randomized controlled trials and observational studies. In separate sensitivity analyses, we excluded randomized controlled trials and collapsed protocols, guidelines, and bundles into one category of intervention. We conducted meta-analyses for clinical outcomes (ICU and hospital mortality, ventilator-associated pneumonia, duration of mechanical ventilation, and ICU length of stay) related to interventions that were associated with improvements in processes of care. From 11,742 publications, we included 119 investigations (seven randomized controlled trials, 112 observational studies) on nine clinical topics. Interventions that included protocols with or without education improved continuous process measures (seven observational studies and one randomized controlled trial; standardized mean difference [95% CI]: 0.26 [0.1, 0.42]; p = 0.001 and four observational studies and one randomized controlled trial; 0.83 [0.37, 1.29]; p = 0.0004, respectively). Heterogeneity among studies within topics ranged from low to extreme. The exclusion of randomized controlled trials did not change our results. Single-intervention and lower-quality studies had higher standardized mean differences compared to multiple-intervention and higher-quality studies (p = 0.013 and 0.016, respectively). There were no associated improvements in clinical outcomes. Knowledge translation interventions in the ICU that include protocols with or without education are associated with the greatest improvements in processes of critical care.
    Critical care medicine 08/2013; · 6.37 Impact Factor
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    ABSTRACT: The Family Satisfaction in the Intensive Care Unit 24 (FS-ICU 24) survey consists of two domains (overall care and medical decision-making) and was validated only for family members of adult patients in the ICU. The purpose of this study was to evaluate the internal consistency and construct validity of the FS-ICU 24 survey modified for parents/caregivers of pediatric patients (Pediatric Family Satisfaction in the Intensive Care Unit 24 [pFS-ICU 24]) by comparing it to McPherson's PICU satisfaction survey, in a similar racial/ethnic population as the original Family Satisfaction in the Intensive Care Unit validation studies (English-speaking Caucasian adults). We hypothesized that the pFS-ICU 24 would be psychometrically sound to assess satisfaction of parents/caregivers with critically ill children. A prospective survey examination of the pFS-ICU 24 was performed (1/2011-12/2011). Participants completed the pFS-ICU 24 and McPherson's survey with the order of administration alternated with each consecutive participant to control for order effects (nonrandomized). Cronbach's alphas (α) were calculated to examine internal consistency reliability, and Pearson correlations were calculated to examine construct validity. University-affiliated, children's hospital, cardiothoracic ICU. English-speaking Caucasian parents/caregivers of children less than 18 years old admitted to the ICU (on hospital day 3 or 4) were approached to participate if they were at the bedside for greater than or equal to 2 days. Fifty parents/caregivers completed the surveys (mean age ± SD = 36.2 ± 9.6 yr; 56% mothers). The α for the pFS-ICU 24 was 0.95 and 0.92 for McPherson's survey. Overall, responses for the pFS-ICU 24 and McPherson's survey were significantly correlated (r = 0.73; p < 0.01). The average overall pFS-ICU 24 satisfaction score was 92.6 ± 8.3. The average pFS-ICU 24 satisfaction with care domain and medical decision-making domain scores were 93.3 ± 8.8 and 91.2 ± 8.9, respectively. The pFS-ICU 24 is a psychometrically sound measure of satisfaction with care and medical decision-making of parents/caregivers with children in the ICU.
    Pediatric Critical Care Medicine 07/2013; · 2.35 Impact Factor
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    ABSTRACT: Thrombocytopenia is the most common hemostatic disorder in critically ill patients. The objective of this study was to describe the incidence, risk factors, and outcomes of thrombocytopenia in patients admitted to medical-surgical intensive care units (ICUs). 3746 patients in 67 centers were enrolled in a randomized trial in which unfractionated heparin was compared to low-molecular-weight heparin (LMWH) for thromboprophylaxis. Patients who had baseline platelet counts <75x109/L or severe coagulopathy at screening were excluded. We analyzed the risk of developing mild (100-149x109/L), moderate (50-99x109/L) and severe (<50x109/L) thrombocytopenia during ICU stay. We also assessed independent and time-varying predictors of thrombocytopenia and the effect of thrombocytopenia on major bleeding, transfusions, and death. The incidence of mild, moderate, and severe thrombocytopenia was 15.3%, 5.1% and 1.6%, respectively. Predictors of each category of thrombocytopenia were: APACHE II score, use of inotropes or vasopressors, and renal replacement therapy. The risk of moderate thrombocytopenia was lower in patients who received LMWH thromboprophylaxis, but higher in surgical patients and in patients who had liver disease. Each category of thrombocytopenia was associated with subsequent bleeding and transfusions. Moderate and severe thrombocytopenia were associated with increased ICU and hospital mortality. A high severity of illness, prior surgery, use of inotropes or vasopressors, renal replacement therapy, and liver dysfunction are associated with a higher risk of thrombocytopenia developing in ICU, whereas LMWH thromboprophylaxis is associated with a lower risk. Patients who develop thrombocytopenia in the ICU are more likely to bleed, receive transfusions and die.
    Chest 06/2013; · 7.13 Impact Factor

Publication Stats

5k Citations
908.33 Total Impact Points


  • 1991–2014
    • University of British Columbia - Vancouver
      • • Division of Critical Care Medicine
      • • Centre for Health Evaluation & Outcome Sciences
      • • Department of Medicine
      Vancouver, British Columbia, Canada
  • 2013
    • Université du Québec
      Québec, Quebec, Canada
    • University of British Columbia - Okanagan
      Kelowna, British Columbia, Canada
  • 2012
    • King Saud bin Abdulaziz University for Health Sciences
      • College of Medicine
      Ar Riyāḑ, Ar Riyāḑ, Saudi Arabia
  • 1990–2012
    • St. Paul's Hospital
      Saskatoon, Saskatchewan, Canada
  • 2004–2011
    • Dalhousie University
      • Department of Medicine
      Halifax, Nova Scotia, Canada
  • 2009
    • University of Alberta
      • Division of Critical Care Medicine
      Edmonton, Alberta, Canada
    • Columbia University
      • Division of Pediatric Critical Care Medicine
      New York City, NY, United States
  • 2002–2009
    • Queen's University
      • • Department of Oncology
      • • Department of Medicine
      Kingston, Ontario, Canada
    • Royal Columbian Hospital
      New Westminster, British Columbia, Canada
  • 2007–2008
    • University of Toronto
      • Division of Critical Care Medicine
      Toronto, Ontario, Canada
    • Sunnybrook Health Sciences Centre
      Toronto, Ontario, Canada
  • 2004–2008
    • McMaster University
      • • Department of Medicine
      • • Department of Clinical Epidemiology and Biostatistics
      Hamilton, Ontario, Canada
  • 2005
    • Queen Elizabeth Dental Services Inc.
      Montréal, Quebec, Canada
  • 1999
    • University of Victoria
      • School of Health Information Science
      Victoria, British Columbia, Canada
  • 1987
    • Harbor-UCLA Medical Center
      Torrance, California, United States