• Journal of Korean Medical Science
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• 제33권45호
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• pp.280.1-280.9
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• 2018

Background: Surveillance and interventions of central line-associated bloodstream infections (CLABSIs) had mainly been targeted in intensive care units (ICUs). Central lines are increasingly used outside ICUs. Therefore, we performed a hospital-wide survey of CLABSIs to evaluate the current status and develop strategies to reduce CLBASI rates. Methods: All hospitalized patients with central venous catheters (CVCs) were screened for CLABSIs from January 2014 through December 2015 at a 1,328 bed tertiary care teaching hospital in Korea using an electronic data-collecting system. Clinical information including type of CVC was collected. CLABSI rates were calculated using the definitions of the National Health and Safety Network after excluding mucosal barrier injury laboratory-confirmed bloodstream infection (BSI). Results: A total of 154 CLABSIs were identified, of which 72 (46.8%) occurred in general wards and 82 (53.2%) in ICUs (0.81 and 2.71 per 1,000 catheter days), respectively. Nontunneled CVCs were most common (68.6%) among 70 CLABSI events diagnosed within one week of their maintenance. On the other hand, tunneled CVCs and peripherally inserted central catheters (PICCs) were more common (60.5%) among 114 CLABSI events diagnosed more than a week after maintenance. Whereas the majority (72.2%) of CLABSIs in ICUs were associated with non-tunneled CVCs, tunneled CVCs (38.9%) and PICCs (36.8%) were more common in general wards. Conclusion: CLABSIs are less common in general wards than in ICUs, but they are more often associated with long-term indwelling catheters. Therefore, interventions to prevent CLABSIs should be tailored according to the type of ward and type of catheter.

• Clinical and Experimental Pediatrics
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• 제54권9호
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• pp.363-367
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• 2011

Central venous catheters (CVCs) are regularly used in intensive care units, and catheter-related bloodstream infection (CRBSI) remains a leading cause of healthcare-associated infections, particularly in preterm infants. Increased survival rate of extremely-low-birth-weight infants can be partly attributed to routine practice of CVC placement. The most common types of CVCs used in neonatal intensive care units (NICUs) include umbilical venous catheters, peripherally inserted central catheters, and tunneled catheters. CRBSI is defined as a laboratory-confirmed bloodstream infection (BSI) with either a positive catheter tip culture or a positive blood culture drawn from the CVC. BSIs most frequently result from pathogens such as gram-positive cocci, coagulase-negative staphylococci, and sometimes gram-negative organisms. CRBSIs are usually associated with several risk factors, including prolonged catheter placement, femoral access, low birth weight, and young gestational age. Most NICUs have a strategy for catheter insertion and maintenance designed to decrease CRBSIs. Specific interventions slightly differ between NICUs, particularly with regard to the types of disinfectants used for hand hygiene and appropriate skin care for the infant. In conclusion, infection rates can be reduced by the application of strict protocols for the placement and maintenance of CVCs and the education of NICU physicians and nurses.

• Journal of Microbiology and Biotechnology
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• 제31권11호
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• pp.1481-1489
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• 2021

Early and accurate detection of pathogens is important to improve clinical outcomes of bloodstream infections (BSI), especially in the case of drug-resistant pathogens. In this study, we aimed to develop a culture-independent digital PCR (dPCR) system for multiplex detection of major sepsis-causing gram-negative pathogens and antimicrobial resistance genes using plasma DNA from BSI patients. Our duplex dPCR system successfully detected nine targets (five bacteria-specific targets and four antimicrobial resistance genes) through five reactions within 3 hours. The minimum detection limit was 50 ag of bacterial DNA, suggesting that 1 CFU/ml of bacteria in the blood can be detected. To validate the clinical applicability, cell-free DNA samples from febrile patients were tested with our system and confirmed high consistency with conventional blood culture. This system can support early identification of some drug-resistant gram-negative pathogens, which can help improving treatment outcomes of BSI.

• Clinical and Experimental Pediatrics
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• 제45권6호
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• pp.719-726
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• 2002

목 적: 신생아 집중 치료술의 발달로 고위험 신생아의 생존율이 많이 개선되었지만 적극적인 침습적 시술의 증가로 신생아 사망과 이환의 주요한 원인이 되는 신생아 감염의 발생은 오히려 높아졌다. 본 연구는 신생아 중환자실에서 원내 감염의 분포 양상, 원인균, 발생 빈도 및 변화 양상 등 5년간의 추이를 알아보기 위해 실시하였다. 방 법: 1995년 1월부터 1999년 12월까지 전남대학교병원 신생아 중환자실에 입원하여 혈액, 피부, 기관내 튜우브, 카테테르, 눈, 소변, 대변, 뇌 척수액에서 시행한 균 배양 검사 상 양성으로 나온 환아들 중 선천성 감염을 제외하고 임상 증상으로 원내 감염이 의심되었던 환아들에서 원내 감염의 분포 양상과 원인균 및 혈중 감염의 빈도, 원인균, 사망률 추이에 대하여 조사하였다. 결 과 : 5년 동안 신생아 중환자실에 입원한 환아의 원내 감염률은 입원 환아 100명당 9.0례이었고, 감염소로는 혈중 감염이 32.3%로 가장 많았으며, 피부(18.4%), 기관내 튜우브(17.2%), 카테테르(10.6%), 눈(10.0%), 소변(6.1%), 대변(3.0%), 뇌 척수액(2.4%) 순이었다. 원인균은 S. aureus가 29.9%로 가장 많았고 coagulase-negative staphylococci(CONS), Enterobacter,Candida 순이었다. 감염소별 원인균은 혈중과 카테테르는 S. aureus와 CONS, 피부와 눈은 S. aureus, 기관내 튜우브는 Enterobacter, 소변은 Candida와 enterococci, 그리고 대변은 Pseudomonas와 S. aureus가 흔하였고, 다병소 감염율은 26.1%이었다. 원내 감염률은 입원 환아 100명당 1995년 9.5례에서 1999년 11.6례로 증가하였으며, 원인균으로 S. aureus 는 감소하고 CONS, Candida, Klebsiella, Acinetobacter baumannii는 증가하는 추이를 보였다. 동기간 동안 혈중 감염률은 입원 환아 100명당 3.6례였으며, CONS와 S. aureus가 가장 많았다. 혈중 감염률은 입원 환아 100명당 1995년 2.1례에서 1999년 5.2례로 증가하였는데 원인균으로 S. aureus는 감소하고 CONS, Candida, Klebsiella, Acinetobacter baumannii는 증가하는 추이를 보였고, 패혈증에 의한 사망률은 11.9%이었다. 결 론 : 신생아 원내 감염의 가장 흔한 감염소는 혈중 감염이고 원인균으로는 S. aureus가 가장 흔하며, CONS, Candida, Klebsiella, Acinetobacter baumannii에 의한 감염은 증가하는 추이이므로, 이에 대한 예방 및 치료를 위한 노력이 필요할 것으로 사료된다.

• Advances in pediatric surgery
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• 제16권1호
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• pp.25-31
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• 2010

Hickman catheters are tunneled central venous catheters used for long-term venous access in children with malignancies. The appropriate management for various kinds of catheter related complications has become a major issue. We retrospectively analyzed the clinical, demographic, and surgical characteristics in 154 pediatric hemato-oncology patients who underwent Hickman catheter insertion between January 2005 and December 2009. There were 92 boys and 62 girls. The mean age at surgery was $7.6{\pm}5.1$ years old. The mean operation time was $67.4{\pm}21.3$ minutes and C-arm fluoroscopy was used in 47(30.5 %). The causes of Hickman catheter removal were termination of use in 82 (57.3 %), catheter related bloodstream infection in 44(30.8 %), mechanical malfunction in 11(7.7 %), and accidents in 6(4.2 %). Univariate and multivariate analysis for associated factors with catheter related bloodstream infection showed that there were no statistically significant associated factors with catheter related infection complications. All cases except two showed clinical improvement with catheter removal and relevant antibiotics treatment. The mean catheter maintenance period in patients of catheter removal without complications was $214.9{\pm}140.2$ days. And, The mean catheter maintenance period in patients of late catheter related bloodstream infection was $198.0{\pm}116.0$ days. These data suggest that it is important to remove Hickman catheter as soon as possible after the termination of use. When symptoms and signs of complications were noticed, prompt diagnostic approach and management can lead to clinical improvements.

• Journal of Korean Biological Nursing Science
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• 제18권4호
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• pp.257-263
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• 2016

Background: This study purposed to examine how the incidence of the central line-associated bloodstream infection (CLABSI) in a operating room (OR) is affected by bundle application on central line insertion (CLI) practice. Methods: The study design was a pretest-posttest experimental trial. The subjects were 83 patients before the bundle application on CLI and 70 patients after. Results: The compliance(%) of bundle on CLI of among those who observed all of the five items increased from 7.2% before the intervention to 72.9% after. By items, compliance with the maximal barrier precaution was 100% for the use of a mask and cap before and after the intervention, but increased from 73.5% before the intervention to 88.6% after for the hand hygiene, from 73.5% to 88.6% for the use of a sterile gown, and from 9.6% to 75.7% for the use of a sterile large drape covering the whole body. CLABSI did not happen on CLI either before or after the application of the bundle intervention. Conclusion: Bundle application increased compliance with the use of a sterile gown and the use of a sterile large drape. However, its effect in the prevention of CLABSI was not clear probably due to the short period of intervention in a single hospital.

• 대한의생명과학회지
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• 제19권3호
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• pp.245-253
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• 2013

To provide reference data or guideline for empirical treatment of bloodstream infection, we studied a change pattern in causative microorganisms and antimicrobial susceptibility in a general hospital at Gyeonggi province during five years. We retrospectively reviewed the frequency of causative microorganisms and antimicrobial susceptibility results of 5,782 microorganisms isolated from blood culture in a general hospital during the period from January 2008 to December 2012. The most common pathogens were Escherichia coli (14.7%), Staphylococcus aureus (7.5%), Streptococcus viridans group (4.9%), and Klebsiella pneumoniae (4.1%). The multiple microorganisms were isolated in 4.3% of bloodstream infection patients. The average contamination rate of blood culture during five years was 3.0%. Methicillin-resistant S. aureus (MRSA), vancomycin-resistant Enterococcus faecium (VRE), and penicillin-resistant Streptococcus pneumoniae were isolated at 62%, 27% and 11%, respectively. Cefotaxime-resistant E. coli and K. pneumoniae was 20% and 18%, respectively. Imipenem-resistant Pseudomonas aeruginosa (IRPA) and Acinetobacter baumannii (IRAB) was 25% and 66%, respectively. E. coli and S. aureus were most common pathogens isolated from blood culture for five years. The increase of multidrug-resistant microorganisms, such as MRSA, VRE, ESBL, IRPA and IRAB, requires more strict control of antibiotics and causes the need of the more updated guideline for the treatment of blood stream infection.

• Pediatric Infection and Vaccine
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• 제17권2호
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• pp.83-90
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• 2010

목적:다균혈증이란 동일한 환자의 혈액에서 24시간 이내에 2종 이상의 세균 또는 진균이 분리되는 질환으로 정의하며 이러한 다균혈증은 높은 사망률과 치료의 어려움으로 인해 많은 연구가 필요한 부분이다. 따라서 본 저자들은 국내 단일 기관에서 일정 기간동안 전체 소아환자를 대상으로 하여 발생한 다균혈증 환자에 대한 임상적 특징과 균종의 특성에 대한 조사를 시행하였다. 방법 : 동일한 환자에서 무균적으로 검출된 혈액 검체를 호기성 배지와 혐기성 배지에서 배양한 결과 2종 이상의 균종이 검출되는 경우에 해당하는 환자의 의무 기록을 후향적으로 조사하였으며 이들의 임상 양상과 혈액학적 검사결과를 T-검정과 카이제곱 검정을 통해 분석하였다. 결과: 2001년부터 2008년까지 소아 환자에서 총 97명, 113예의 다균혈증이 있었으며 이들은 남자 78명, 여자 19명으로 4.1:1의 성비를 보였다. 다균혈증이 전체 균혈증에서 나타난 빈도를 연도별로 조사한 결과 2001년에 4예(1.4%)에서 2008년에는 14예(10.9%)로 전체적으로 증가하는 양상을 보였다. 기저 질환별 다균혈증의 검출되는 빈도는 면역 저하를 보인 혈액 종양 환자 31.9%, 심혈관 질환 15.4%, 신경계 질환 10.3%, 호흡기 질환 8.2%의 빈도로 나타났으며 전체 균종별 빈도는 그람 양성이 60.5%, 그람 음성이 29.2%, 혐기성 균주이 2.5%, 진균이 7.6%으로 검출되었다. 다균혈증 환자들의 사망률과 연관된 위험 인자로 기저 질환이 있었던 경우와 중심 혈관 도관이 있었던 경우, 원내 감염이었던 경우, 중환자실에서 치료를 받은 경우, 2회 이상의 다균혈증이 나타난 경우, 진균 감염이 동반된 경우에서 사망률과 의미있는 연관성을 보였다(P<0.05). 결론 : 다균혈증은 세계적으로 증가하는 추세를 보이고 있는 질환으로 다균혈증이 있는 소아 환자에서의 사망률은 성인에 비해 높으며 복합적인 위험인자와 중증의 합병증의 발생으로 인해 치료가 어려우므로 더욱 적극적인 치료가 필요할 것으로 보인다. 본원의 결과는 이전의 연구 결과와 비교하여 다균혈증 환자들의 기저질환으로 만성적인 면역저하자에서 가장 많이 나타났고 진균이 동반된 감염과 그람 양성 균종에 의한 감염이 이전보다는 증가한 것으로 보이고 있으나 이러한 결과에 대해서는 단일 균종에 의한 감염까지 포함하는 좀 더 포괄적인 조사가 필요할 것으로 보인다.

• Clinical and Experimental Pediatrics
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• 제62권3호
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• pp.79-84
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• 2019

Newborn infants, including premature infants, are high-risk patients susceptible to various microorganisms. Catheter-related bloodstream infections are the most common type of nosocomial infections in this population. Regular education and training of medical staffs are most important as a preventive strategy for central line-associated bloodstream infections (CLABSIs). Bundle approaches and the use of checklists during the insertion and maintenance of central catheters are effective measures to reduce the incidence of CLABSIs. Chlorhexidine, commonly used as a skin disinfectant before catheter insertion and dressing replacement, is not approved for infants <2 months of age, but is usually used in many neonatal intensive care units due to the lack of alternatives. Chlorhexidine-impregnated dressing and bathing, recommended for adults, cannot be applied to newborns. Appropriate replacement intervals for dressing and care sets are similar to those recommended for adults. Umbilical catheters should not be used longer than 5 days for the umbilical arterial catheter and 14 days for the umbilical venous catheter. It is most important to regularly educate, train and give feedback to the medical staffs about the various preventive measures required at each stage from before insertion to removal of the catheter. Continuous efforts are needed to develop effective and safe infection control strategies for neonates and young infants.

• Neonatal Medicine
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• 제28권3호
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• pp.116-123
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• 2021

Purpose: The aim of this study was to estimate the effect of targeting risk factors for the control of central line-associated bloodstream infection (CLABSI) among high-risk infants in a tertiary neonatal intensive care unit (NICU). Methods: Infants admitted to the NICU and diagnosed with CLABSI from January to December 2013 were eligible for inclusion to the study. The CLABSI group (n=47) was matched in a 1:2 ratio to the control group (n=94) based on gestational age, birth weight, and Score for Neonatal Acute Physiology-II. Risk factors for CLABSI were identified using the Cox proportional hazard model, and analysis of the effect of these risk factors targeting infection control was performed. Results: The risk factors associated with CLABSI were prolonged central line dwell days (adjusted hazard ratio [HR], 1.028; 95% confidence interval [CI], 1.011 to 1.045; P=0.001), use of a silicone catheter (adjusted HR, 5.895; 95% CI, 1.893 to 18.355; P=0.002), surgical treatment (adjusted HR, 3.793; 95% CI, 1.467 to 9.805; P=0.006), and less probiotic supplementation (adjusted HR, 0.254; 95% CI, 0.068 to 0.949; P=0.042). By targeting these risk factors with a quality improvement initiative, the mean CLABSI incidence rate per 1,000 catheter-days decreased from 6.6 to 3.1 (P=0.004). Conclusion: Targeting risk factors for infection control significantly reduced the rate of CLABSI among high-risk infants in the NICU.