Risk assessment and standardized nosocomial infection rate in critically ill children

Risk factors and cost of nosocomial infections in pediatric patients with traumatic brain injury

OBJECTIVE

This study aimed to determine the factors that increase nosocomial infections (NIs) in pediatric patients with traumatic brain injury (TBI) and the effects on both treatment cost and length of hospital stay.

METHODS

We performed a case-control study on patients admitted to the pediatric intensive care unit (PICU) with (n=66) or without (n=120) TBI between 2012 and 2014. The risk factors, length of stay, and costs of NIs were determined.

RESULTS

Data for 186 patients were analyzed. One hundred and twenty patients were controls (54 males vs. 66 females), while 66 were cases (27 males vs. 39 females). Seventeen out of the 186 PICU patients had NIs. About 7.6% of TBI patients had infections whereas 10% of control groups had NIs (p=0.58). The most isolated microbial agent was Acinetobacterbaumannii (four cases). Thirteen (76.5%) out of the 17 infections were catheter-related bloodstream infections. The mean expenses per PICU patient were $762, with an additional cost of $2081 for patients with nosocomial contamination.

CONCLUSION

The use of catheters was the most critical risk factor for NIs in our study probably underestimated the cost for several reasons. Nevertheless, the findings supported our hypothesis about the additional burden of nosocomial spread on PICU patients. This study's results should help provide evidence on cost-effectiveness or calculate the cost-benefit ratio of reducing NIs in children.

Presence of Invasive Devices and Risks of Healthcare-Associated Infections and Sepsis

The present study evaluated the daily risk of healthcare-associated infections and sepsis (HAIS) events in pediatric intensive care unit patients with invasive devices. This was a retrospective cohort study. Invasive devices were associated with significant daily risk of HAIS ( p  < 0.05). Endotracheal tubes posed the greatest risk of HAIS (hazard ratio [HR]: 4.39, confidence interval [CI]: 2.59-7.46). Children with both a central venous catheter (CVC) and urinary catheter (UC) had over 2.5-fold increased daily risk (HR: 2.59, CI: 1.18-5.68), in addition to daily CVC risk (HR: 3.06, CI: 1.38-6.77) and daily UC risk (HR: 8.9, CI: 3.62-21.91). We conclude that a multistate hazard model optimally predicts daily HAIS risk.

Pediatric Risk of Mortality and Hospital Infection

We studied the association of Pediatric Risk of Mortality scores with nosocomial infections among 341 critically ill patients admitted to a pediatric intensive care unit between June 1998 and December 2000. Through stepwise logistic regression analysis, the best predictors for nosocomial infections were device utilization ratio, antimicrobial therapy, and length of stay.

Prevalence of Nosocomial Infections in Swiss Children's Hospitals

Objective:

To acquire data on pediatric nosocomial infections (NIs), which are associated with substantial morbidity and mortality and for which data are scarce.

Design:

Prevalence survey and evaluation of a new comorbidity index.

Setting:

Seven Swiss pediatric hospitals.

Patients:

Those hospitalized for at least 24 hours in a medical, surgical, intensive care, or intermediate care ward.

Results:

Thirty-five NIs were observed among 520 patients (6.7%; range per hospital, 1.4% to 11.8%). Bacteremia was most frequent (2.5 per 100 patients), followed by urinary tract infection (1.3 per 100 patients) and surgical-site infection (1.1 per 100 patients; 3.2 per 100 patients undergoing surgery). The median duration until the onset of infection was 19 days. Independent risk factors for NI were age between 1 and 12 months, a comorbidity score of 2 or greater, and a urinary catheter. Among surgical patients, an American Society of Anesthesiologists (ASA) score of 2 or greater was associated with any type of NI (P = .03). Enterobacteriaceae were the most frequent cause of NI, followed by coagulase-negative staphylococci; viruses were rarely the cause.

Conclusions:

This national prevalence survey yielded valuable information about the rate and risk factors of pediatric NI. A new comorbidity score showed promising performance. ASA score may be a predictor of NI. The season in which a prevalence survey is conducted must be considered, as this determines whether seasonal viral infections are observed. Periodic prevalence surveys are a simple and cost-effective method for assessing NI and comparing rates among pediatric hospitals.

Device-Related Infections in Critically Ill Patients. Part I: Prevention of Catheter-Related Bloodstream Infections

Device utilization in critically ill patients is responsible for a high risk of complications such as catheter-related bloodstream infections (CRBSI), ventilator-associated pneumonia (VAP) and urinary tract infections (UTI). In this article we will review the current status of data regarding CRBSI prevention. General recommendations include staff education and use of a surveillance program with a restrictive antibiotic policy. Adequate time must be allowed for hand washing and barrier precautions must always be used during device manipulation. The routine changing of central catheters is not necessary and increases costs; it is necessary to decrease the handling of administration sets, to use a more careful insertion technique and less frequent set replacement. Antiseptic-coated catheters appear to reduce catheter colonization but their ability to prevent catheter-related infections requires further demonstration. More clinical trials are needed to verify the efficacy of measures to prevent CRBSI.

Transfusion of leukocyte-depleted red blood cells is not a risk factor for nosocomial infections in critically ill children

OBJECTIVES

Transfusion of red blood cells is increasingly linked with adverse outcomes in critically ill children. We tested the hypothesis that leukocyte-depleted red blood cell transfusions were independently associated with increased development of bloodstream infections, ventilator-associated pneumonias, or urinary tract infections.

DESIGN

Historical, descriptive cohort study.

SETTING

Single-center, mixed medical-surgical, closed nine-bed pediatric intensive care unit of a tertiary university hospital.

PATIENTS

All children <18 yrs of age consecutively admitted to the pediatric intensive care unit during a 3-yr period (January 1, 2005, to December 31, 2007).

INTERVENTIONS

None.

RESULTS

One thousand one hundred twenty-three patients were admitted, of whom 503 (44.8%) were admitted for >48 hrs. Sixty-five (12.9%) had a nosocomial infection (incidence 19.3 per 1,000 pediatric intensive care unit admissions per year). Patients with a nosocomial infection were significantly more often male (72.3% vs. 27.7%, p = .033), had a higher Pediatric Risk of Mortality II score (median 19.1 [range, 6-44] vs. 18.0 [range, 2-39], p = .023), were more often ventilated (95.4% vs. 80.1%, p = .003), and received more often red blood cell transfusions (55.4% vs. 40.2%, p = .021). Multivariate logistic regression analysis showed that male gender (odds ratio, 2.07; 95% confidence interval, 1.14-3.76), presence of an indwelling central venous catheter (odds ratio, 2.41; 95% confidence interval, 1.29-4.48), and simultaneous use of more than one type of antimicrobial drug were independently associated with the development of nosocomial infections. Red blood cell transfusion was discarded as a predictor.

CONCLUSIONS

Transfusion of leukocyte-depleted red blood cells was not independently associated with the development of nosocomial infections in a heterogeneous group of critically ill children.

Risk factors for healthcare-associated infection in pediatric intensive care units: a systematic review

A systematic review of observational studies on risk factors for healthcare-associated infection in pediatric Intensive Care Units (ICU) was carried out. Studies indexed in MEDLINE, LILACS, Cochrane, BDENF, CAPES databases published in English, French, Spanish or Portuguese between 1987 and 2006 were included and cross references added. Key words for search were 'cross infection' and 'Pediatric Intensive Care Units' with others sub-terms included. 11 studies were selected from 419 originally found: four studies had healthcare-associated infection as the main outcome without a specific site; three articles identified factors associated with lower respiratory tract infection (pneumonia or tracheitis); three articles were concerned with laboratory-confirmed bloodstream infection; and a single retrospective study analyzed urinary tract infection. The production of evidence on risk factors Paediatric ICU has not kept up the same pace of that on adult - there are few studies with adequate design and statistical analysis. The methodological diversity of the studies did not allow for a summarized measurement of risk factors.

The pediatric multiple organ dysfunction syndrome

OBJECTIVES

To review the epidemiology of pediatric multiple organ dysfunction syndrome (MODS) and summarize current concepts regarding the pathophysiology of shock, organ dysfunction, and nosocomial infections in this population.

DATA SOURCE

A MEDLINE-based literature search using the keywords MODS and child, without any restriction to the idiom.

MAIN RESULTS

Critically ill children may frequently develop multisystemic manifestations during the course of severe infections, multiple trauma, surgery for congenital heart defects, or transplantations. Descriptive scores to estimate the severity of pediatric MODS have been validated. Young age and chronic health conditions have also been recognized as important contributors to the development of MODS. Unbalanced inflammatory processes and activation of coagulation may lead to the development of capillary leak and acute respiratory distress syndrome. Neuroendocrine and metabolic responses may result in insufficient adaptive immune response and the development of nosocomial infections, which may further threaten host homeostasis.

CONCLUSIONS

Over the last 20 yrs, there has been an increasing knowledge on the epidemiology of pediatric MODS and on the physiologic mechanisms involved in the genesis of organ dysfunction. Nevertheless, further studies are needed to more clearly evaluate what is the long-term outcome of pediatric MODS.

[Nosocomial infections in pediatric patients following cardiac surgery]

INTRODUCTION

Nosocomial infection (NI) is a possible complication in patients who undergo cardiac surgery, and represents an important cause of morbidity and mortality. This study was undertaken to determine the NI rate, main risk factors, and microbial spectrum in a paediatric intensive care unit (PICU) for this group of patients.

PATIENTS AND METHODS

A prospective review was performed, including all patients admitted to the PICU after cardiac surgery between December 2003 and November 2004. NI was defined according to Centers for Disease Control criteria.

RESULTS

Sixty-nine patients were included. Sixteen patients (23.2 %) acquired at least one episode of NI. The NI rate was 4.9 per 100 patient-days. The most common NI was pneumonia, followed by urinary tract infection. There were no episodes of sepsis. No patients died from infectious causes. The main aetiological organism was Haemophilus influenzae, associated with 41.6 % of pneumonias, and followed by Pseudomonas aeruginosa. No multiresistant organisms were isolated. There was a statistically significant association between the duration of use of external devices (mechanical ventilation, urinary and central venous catheterization) and development of NI.

CONCLUSIONS

Aggressive monitoring and support devices are the main risk factors for NI. Based on our data, we suggest early removal of these. Presumed NI should be diagnosed according standard criteria before starting antibiotic therapy, and treatment modified depending on culture results.

Risk factors for central venous catheter-related infections in pediatric intensive care

OBJECTIVES

To identify risk factors for short-term percutaneously inserted central venous catheter-related infections in children and to evaluate the accuracy of a mortality score in predicting the risk of infection.

METHOD

After reviewing the charts of patients who developed catheter-related infection in a university hospital's pediatric intensive care unit, we conducted a case-controlled study with 51 pairs. Variables related to patients and to catheter insertion and use were analyzed. Risk factors were defined by logistic regression analysis. The accuracy of the Pediatric Risk of Mortality score to discriminate the risk for infection was tested using the Receiver Operating Characteristic curve.

RESULTS

Infection was associated with respiratory failure, patient's length of stay, duration of tracheal intubation, insertion of catheter in the intensive care unit and parenteral nutrition. Insertion site (femoral or internal jugular) was unimportant. Multivariate logistic regression analysis identified the following variables. Risk factors included more than one catheter placement (p=0.014) and duration of catheter use (p=0.0013), and protective factors included concomitant antibiotic use (p=0.0005) and an intermittent infusion regimen followed by heparin filling compared to continuous infusion without heparin (p=0.0002). Pediatric Risk of Mortality did not discriminate the risk of infection.

CONCLUSIONS

Central parenteral nutrition and central venous catheters should be withdrawn as soon as possible. Femoral vein catheterization carries a risk of infection similar to internal jugular catheterization. The Pediatric Risk of Mortality score should not be used to predict the risk of central catheter-related infections.

Risk factors of catheter-related bloodstream infections in parenteral nutrition catheterization

BACKGROUND

Intravascular catheters are integral to the practice of modern medicine. Potential risk factors for catheter-related bloodstream infection (CRBSI) include underlying disease, method of catheter insertion, and duration and purpose of catheterization. The administration of parenteral nutrition (PN) through intravascular catheters increases CRBSI risks. The purpose of this study was to evaluate the risk factors of CRBSI in patients with PN administration.

METHODS

This study was conducted at the Karadeniz Technical University Hospital between October 2003 and November 2004. All the patients to whom PN was administered through intravascular catheters were prospectively monitored for the presence of CRBSI and risk factors.

RESULTS

During the study period, 111 intravascular catheters through which PN was administered were monitored for a total of 1646 catheter-days. CRBSI was determined in 31 cases, a CRBSI rate of 18.8 per 1,000 catheter-days. When risk factors affecting CRBSI were investigated using logistic regression, an increase in APACHE II score (OR, 1.10; 95% CI, 1.01-1.21; p = .012), prolongation of catheterization (OR, 1.08; 95% CI, 1.02-1.14; p = .004), catheterization in emergent conditions (OR, 5.45; 95% CI, 1.20-24.82; p = .016), and poor patient hygiene (OR, 4.38; 95% CI, 1.39-13.78; p = .019) were all determined to be independent risk factors. Proper implementation of hand hygiene and maximal barrier precautions during the insertion of catheters reduced CRBSI levels (OR, 0.28; 95% CI, 0.09-0.88; p = .003 and OR, 0.26; 95% CI, 0.08-0.93; p = .017, respectively).

CONCLUSIONS

It was concluded that the duration of catheterization should be shortened; that the intravascular catheter, which is inserted in urgent situations, should be removed as soon as possible; and that maximal sterile barrier precautions should be taken and due attention should be paid to hand hygiene.

Can we apply the European surveillance program of nosocomial infections (HELICS) to pediatric intensive care units?

OBJECTIVE

To evaluate the applicability of the HELICS program [part of the "Improving Patient Safety in Europe" program aiming at controlling nosocomial infections (NI) through surveillance] in European pediatric ICUs.

DESIGN AND SETTING

A comparison of HELICS and pediatric definitions of the main NI was performed. The adaptability of the HELICS questionnaire for pediatric patients was examined. Then a European survey was carried out by e-mail questionnaire to analyze NI surveillance programs.

PARTICIPANTS

Units affiliated with the European Society of Paediatric and Neonatal Intensive Care or the French Groupe Francophone de Réanimation et Urgences Pédiatriques.

MEASUREMENTS AND RESULTS

The main differences between adult and pediatric ICUs were the definition of ICU-acquired pneumonia, severity scores at admission, and scores of risk for NI. A total of 65 answers from 23 countries were collected. Among them 56 had a NI surveillance program that was of local origin for 64%. The most frequently collected NI were blood stream infections (91% of the units), catheter-related infections (88%), acquired pneumonia (86%), and urinary tract infections (77%). Definitions of NI had a local-based origin in 18% of cases, a regional-based or nation-wide origin in 21%, came from the Centers for Disease Control and Prevention in 38% and had multiple origins in 20%. Seventy-five percent of the units declared an interest in joining a European pediatric working group on NI within the European Society of Paediatric and Neonatal Intensive Care.

CONCLUSIONS

The adaptation of the HELICS protocol for pediatric ICUs is necessary. Its application is largely wished and may be easily performed.

One year study of bacterial and fungal nosocomial infections among patients in pediatric intensive care unit (PICU) in Alexandria

A 1-year prospective and observational study included all admissions (n=216) until 48 h after discharge to Alexandria PICU between first of May 2003 and end of April 2004. Cultures for bacteria and fungi and antibiotic sensitivity tests (19 antibiotic using Bauer-Kirby disc diffusion method) were obtained (blood, stool, urine and cerebrospinal fluid, if needed) and repeated on suspicion of NIs. All cannulae, endotracheal tube (ET) aspirates and tips, nasogastric tubes and different catheters were cultured. All PICU health care workers (HCWs) were subjected to throat and under-finger nails cultures as well as inanimate objects, both on bimonthly basis. The referral place (ward or emergency), PRISM III score, length of stay (LOS) and fate were recorded. Amongst those patients whose age ranged from 1 to 23 months, 23 per cent had NIs with infection rates of 40/1000 days. Significantly high rates of mortality, LOS and PRISM III score were encountered among patients with NIs (52 per cent vs 30 per cent; 9.4+/-4.8 vs 5.4+/-2.2 days; 14.4+/-7 vs 11.8+/-6 respectively). The descending order of frequency of NIs was blood stream infection (BSI) (47 per cent), urinary tract infection (UTI) (28 per cent), ventilator-associated pneumonia (VAP) (16 per cent) and meningitis (9 per cent). Gr-ve bacilli accounted for 76.7 per cent; Gr+ve cocci 13.3 per cent (with satisfactory sensitivity to cefepime, imipenem and meropenem) and Candida albicans 10 per cent of all NIs. The rate of NIs/1000 device days were: 18.7 per cent for BSI, 10.9 per cent for VAP and 25.5 per cent for UTI. Vulnerable age groups were >6 m for VAP and <6 m for meningitis. Multiple logistic regression analysis identified LOS, PRISM III score and referral from wards a predictors of NI acquisition (odd ratio and 95 per cent confidence interval: 1.537, 1.423-1.659; 1.073, 1.041-1.105 and 0.269, 0.178-0.406 respectively). Bimonthly cultures for HCWs isolated coagulase-ve Staphylococci, while inanimate objects isolated diphtheroids and Candida albicans.

CONCLUSION

NIs rate was high (23 per cent) mainly due to severity of condition on admission as shown by high PRISM III score value, the high PRISM III score, LOS and referral from wards were predictors of acquisition of NIs and there is a high incidence of Candida albicans infection (10 per cent of NIs).

Pediatric catheter-related bloodstream infections: latest strategies to decrease risk

Central venous catheters are often mandatory devices when caring for critically ill children. They are required to deliver medications, nutrition, and blood products, as well as for monitoring hemodynamic status and drawing laboratory samples. Any foreign object that is introduced to the body is at risk for infection. Central venous catheters carry a particularly high risk of infection and these infections can be life threatening. Advanced practice nurses possess the power to influence catheter-related line infections in their critical care units. Understanding current recommendations for catheter material selection, site selection, site preparation, and site care can affect rates of catheter-related bloodstream infections. This article discusses risk factors for developing catheter-related bloodstream infections in critically ill children, as well as measures to decrease incidence of catheter-related bloodstream infections, including a review of recommendations from the Centers for Disease Control and Prevention.

Nosocomial catheter-related bloodstream infections in a pediatric intensive care unit: risk and rates associated with various intravascular technologies

OBJECTIVE

Nosocomial bloodstream infections are associated with increased patient morbidity, mortality, and hospital costs. More than 90% of these infections are related to the use of intravascular catheter devices. This study was done to assess the risk and rates of catheter related-bloodstream infections (CR-BSI) associated with different intravascular technologies in a pediatric intensive care unit population.

DESIGN

Retrospective cohort study.

SETTING

A 16-bed pediatric intensive care unit in a tertiary children's hospital.

STUDY POPULATION

All admissions between July 1997 and December 1999 requiring placement of an intravascular access device for care were examined. Patients with CR-BSI were identified through ongoing surveillance using Centers for Disease Control/National Nosocomial Infections Surveillance System definitions for bloodstream infection.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Of the 2,728 admissions during the review period, 1,043 (38.3%) required placement of an intravascular access device. Bivariate analysis revealed that patients who required intravascular cannulae for extracorporeal life support had a 10-fold increased risk of developing a CR-BSI, and patients requiring vascular access for renal replacement therapy demonstrated a 4-fold increase in the risk of developing CR-BSI compared with the referent group. There was a significant increase in the CR-BSI rate associated with the use of more intravascular access devices per patient admission. Multivariate logistic regression identified the use of extracorporeal life support therapy and the total duration of use of intravascular access devices as significant independent predictors of CR-BSI when controlling for other predictors.

CONCLUSION

The use of extracorporeal life support therapy, the presence of multiple intravascular access devices, and the total duration of intravascular access device use were associated with an increase in the rate and risk of developing CR-BSI in our pediatric intensive care unit population. Larger, prospective studies may help elucidate additional factors responsible for these observations.

Intensive care unit acquired infection: a prevalence and impact on morbidity and mortality

BACKGROUND

Severe infection is a common reason for intensive care and contributes to increased morbidity and mortality. The aim of the study was to determine the prevalence of infection among intensive care unit (ICU) patients and to evaluate the consequences of ICU-acquired infection on morbidity and mortality.

METHODS

A total of 812 patients consecutively admitted for more than 48 h to the ICU at Vilnius University Emergency Hospital, Lithuania, were included in the prospective observational study. Organ dysfunction was assessed using the Sequential Organ Failure Assessment (SOFA) system.

RESULTS

Thirty-seven per cent of patients were identified who developed at least one ICU-acquired infection. Respiratory, bloodstream and urinary tract infections were the most common. The main isolates were coagulase-negative Staphylococcus, S. aureus, Acinetobacter and Pseudomonas species. More severe degree of organ dysfunction, prolonged stay in the ICU and higher hospital mortality rate were more common among patients who acquired infection in the ICU than that of non-infected patients.

CONCLUSION

The prevalence of infection in the ICU was similar to other studies in European countries. The occurrence of ICU-acquired infection was significantly related to the increase in morbidity and mortality. The findings are useful for the comparison of the prevalence rate of infection and implementation of strict infection control policy.

Nosocomial urinary tract infections in children in a pediatric intensive care unit: a follow-up after 10 years

OBJECTIVE

To define nosocomial urinary tract infection (NUTI) rates in a pediatric intensive care unit, and determine whether practice recommendations have been sustained after 10 yrs.

DESIGN

Retrospective, descriptive observational study followed by point prevalence audits of duration of urinary tract catheterization.

SETTING

A 32-bed pediatric intensive care unit in a multidisciplinary, 300-bed, university-affiliated tertiary care hospital.

SUBJECTS

The retrospective review included patients admitted to the pediatric intensive care unit between December 1997 and July 1999 who developed a NUTI. The audits of duration of urinary tract catheterization were performed in December 2001.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

The primary outcome measure was the development of NUTI. Out of 2,832 consecutive admissions, 25 patients developed 27 episodes of NUTI (rate, 0.95/100 admissions). Previous surgery for congenital heart disease was the primary risk factor for NUTI. All 18 patients for whom the duration of catheterization was available had been catheterized for at least 3 days. Gram-negative bacilli and yeast accounted for 82% of NUTI pathogens. Twenty percent of bacterial pathogens were antibiotic resistant. Audits of the duration of urinary tract catheterization done on five separate occasions revealed that the mean duration of catheterization ranged from 3.5 to 4.7 days, with a peak absolute value of 16 days.

CONCLUSIONS

NUTIs in children in our pediatric intensive care unit were associated with previous cardiovascular surgery and with urinary tract catheterization of at least 3 days. The need for careful fluid monitoring by catheterization must be balanced against the increased risk of catheter-related urinary tract infection. Removal of urinary catheters at the earliest opportunity will prevent many infections. Ongoing education or innovative strategies will be required to sustain optimal practice.

Do isolation rooms reduce the rate of nosocomial infections in the pediatric intensive care unit?

PURPOSE

To determine the effect of isolation rooms on the direct spread of nosocomial infections (NIs) owing to cross-colonization in a pediatric intensive care unit (PICU).

MATERIALS AND METHODS

This 6-month comparative clinical study used retrospective data from 1992 (an open single-space unit) and prospective surveillance from 1995 (individual rooms) to assess the effectiveness of the latter design on the control of NIs in critically ill pediatric patients. Patients admitted to the PICU for at least 48 hours underwent a microbiologic survey.

RESULTS

The average number of NIs per patient was higher in 1992 (3.62 +/- 0.7, 78 patients) compared with 1995 (1.87 +/- 0.2, 115 patients). Bacterial NIs were caused by gram-positive cocci (33.3%) and aerobic gram-negative bacilli (66.6%). Fungemia in all cases was caused by Candida albicans. Similarly, length of stay was significantly higher in 1992 compared with 1995 (25 +/- 6 and 11 +/- 6 days, respectively; P <.05). There was a significant reduction of respiratory and urinary tract episodes of NI as well as catheter-related infections in the separate room arrangement.

CONCLUSIONS

Our preliminary analysis suggests a possible beneficial effect of single isolation rooms in reducing NI rate in the PICU. Hence, the influence of room isolation on NIs in pediatric intensive care warrants further investigation.

Overview of catheter-related infections with special emphasis on prevention based on educational programs

Intra-vascular access is an unavoidable tool in sophisticated modern medical practice, and catheter-related infection remains a leading cause of nosocomial infections, particularly in intensive care units where it is associated with significant patient morbidity, mortality, and additional hospital costs. The incidence of catheter-related bloodstream infection ranges from 2 to 14 episodes per 1000 catheter-days. On average, microbiologically documented, device-related bloodstream infections complicate the use of a central venous line in three to five per 100 cases. But this represents only the visible part of the iceberg and most episodes of clinical sepsis are nowadays considered to be catheter-related. We briefly review the pathophysiology of these infections, highlighting the importance of the skin insertion site and the intravenous line hub as principal sources of colonization and infection. Principles of therapy are briefly addressed. A large proportion of these infections are preventable and this has been the objective of creating precise guidelines. It was recently suggested that the situation may evolve with the introduction of antibiotic/antiseptic-coated devices, whose impact on the epidemiology of antibiotic resistance remains to be determined. Recently, educational programs and/or a global preventive strategy based on the strict application of specific preventive measures and careful control of all factors associated with infection proved to be even more effective than coated devices in reducing rates of infection. Practical aspects regarding educational approaches will help clinicians to adapt and incorporate educational programs into clinical practice.

The costs associated with nosocomial bloodstream infections in the pediatric intensive care unit

OBJECTIVE: To assess the operational and subsidiary costs and length of stay (LOS) attributable to nosocomial bloodstream infections (BSI) in a pediatric intensive care unit (PICU). DESIGN: Matched case-control study. SETTING: Sixteen bed PICU in a 250-bed tertiary-care pediatric hospital. PATIENTS: Cases with BSI were prospectively identified from PICU patients who developed a nosocomial BSI from August 1996 to July 1998. Controls were PICU patients who were matched for age, severity of illness, diagnosis, and admission date who did not develop a nosocomial BSI. RESULTS: A total of 38 cases and 38 controls form the basis for this study. The cases and controls were similar with respect to the matching criteria. In addition, the cases and controls did not differ with respect to demographic characteristics or PICU survival. There was a trend toward increased hospital mortality among cases (23.7% vs. 10.5%, p =.084). Significant differences were encountered in the utilization of PICU therapeutic modalities. Cases were significantly less likely to be managed care plan enrollees (36.8% vs. 60.5%, p =.043). Total operational and subsidiary costs for radiology, pharmacy, and laboratory services were significantly higher for cases than controls ($78,272 vs. $35,005, $3,622 vs. $1,432, $8,635 vs. $4,630, and $8,648 vs. $3,971, respectively; all p <.001). The PICU and hospital LOS were significantly higher for cases than controls (19.3 vs. 4.6 days for PICU and 46.7 vs. 24.4 days for hospital; both p <.001). The operational costs attributable to nosocomial infection were $46,133. Radiology, pharmacy, and laboratory costs attributable to nosocomial infection were $2,364, $4,691, and $5,156, respectively. The PICU and hospital LOS attributable to a nosocomial BSI were 14.6 days and 21.1 days, respectively. The attributable mortality rate was 13.1%. CONCLUSIONS: The costs and LOS associated with nosocomial BSI in patients admitted to the PICU were significantly higher than controls.