Barbara Adamik

Effect of sepsis and cardiac surgery with cardiopulmonary bypass on plasma level of nitric oxide metabolites, neopterin, and procalcitonin: correlation with mortality and postoperative complications

Abstract Objectives: To examine the hypothesis that nitrite/nitrate, neopterin, and procalcitonin (PCT) levels can be useful predictors of sepsis-associated mortality and predictors of the postoperative complications after cardiopulmonary bypass (CPB). Design: Prospective clinical study. Setting: Intensive care unit of the Medical University Hospital. Patients: 41 patients with sepsis, 42 patients subjected to open heart surgery with CPB, and 30 healthy volunteers. Measurements and results: Nitrite/nitrate, neopterin, and PCT levels were measured in septic patients as soon as sepsis was recognized and then on the 2nd, 3rd, and 5th days of treatment. Statistically significant differences between survivors and nonsurvivors were found for neopterin and PCT. The area under receiver operating characteristic curve (AUC) for both parameters as predictors of mortality was above 0.8. The nitrite/nitrate level was also higher in nonsurvivors, but the AUC remained below 0.8, which indicates poor predictive power. The same parameters were measured in patients undergoing cardiac surgery before, during and after CPB establishment. The development of postoperative complications was correlated with increased postoperative neopterin and PCT levels. Additionally, neopterin was found as an early marker for the prognosis of postoperative complications, since patients who developed organ dysfunction had had elevated concentration of this parameter even before surgery (AUC 0.83). Measurement of NO metabolite levels was less specific and less sensitive. Conclusions: Our results confirm the value of PCT and neopterin measurement as diagnostic tools in monitoring the clinical course of patients in intensive care units.

Elevated Serum PCT in Septic Shock With Endotoxemia Is Associated With a Higher Mortality Rate.

AbstractTo examine the effect of endotoxemia on the procalcitonin (PCT) serum levels and mortality rates of adult patients with septic shock diagnosed on the day of admission to the intensive care unit (ICU).A retrospective observational study was performed over a 2-year period. Levels of PCT were compared for septic shock patients with and without endotoxemia on admission to the ICU. Endotoxemia was identified with an Endotoxin Activity Assay.One hundred fifty-seven patients with septic shock were enrolled into the study. Group 1 consisted of patients with elevated endotoxin activity (EA) (n = 95, EA = 0.57 endotoxin activity unit [EAU] [0.46–0.67]) and Group 2 consisted of patients with low EA (n = 62, EA = 0.27 EAU [0.17–0.36]). Acute Physiology And Chronic Health Evaluation II (APACHE II) score and SOFA score were similar in both groups (APACHE II = 23 [16–29] and 19 [16–25]; Sequential Organ Failure Assessment [SOFA] = 10 [7–13] and 11 [8–12] in Groups 1 and 2, respectively) (nonsignificant). The PCT level was 6 times higher in Group 1 than in Group 2 (19.6 ng/mL vs. 3.1 ng/mL, P < 0.001). There was a strong correlation between EA and serum PCT (P < 0.001, R = 0.5). The presence of endotoxemia on admission to the ICU was associated with an increased mortality rate: 52% in the group of patients with endotoxemia and 25% in the group without endotoxemia. EA in survivors was 0.39 EAU (0.26–0.57) and 0.53 EAU (0.4–0.61) in nonsurvivors (P = 0.004). The median PCT level in survivors was 6.7 ng/mL (2.3–28.0), compared with 16.7 ng/mL (5.3–31.0) in nonsurvivors (P = 0.04).This observational study revealed that endotoxemia in patients with septic shock on admission to the ICU was frequently found and was associated with an elevated PCT level and a high mortality rate. Endotoxemia was a common occurrence in patients with septic shock, regardless of the infecting microorganism.

Results of the severe sepsis registry in intensive care units in Poland from 2003−2009

BACKGROUND Severe sepsis remains the most common cause of death in intensive care units (ICUs) according to many epidemiological studies. There are no data in Poland on the extent of severe sepsis cases treated in ICUs. The aim of the study was to analyse the course and outcome of severe sepsis patients treated in Polish ICUs. METHODS In 2003, the internet-based severe sepsis registry was created as a multicentre observational research project. An online questionnaire was made accessible to ICUs participating in the study. Questionnaires were completed after the discharge of patients and included demographic data, clinical and microbiological information about the cause, course, treatment and outcome of septic patients. All data were given voluntarily and anonymously. RESULTS During the 7-year period (2003-2009), 4999 cases of severe sepsis were registered for analysis. The mean age of septic patients was 57 years, and the majority of the patients were men (58%). The mean length of stay in the ICU was 10 days. A significant decrease in the mortality rate was observed from 54% in 2003 and 56% in 2004 to 46% in 2009 (P < 0.05). Most of the patients were admitted to the ICU for surgical reasons (56%), and intra-abdominal infections predominated (49%). Severe sepsis patients were admitted to ICUs in critical condition, and the majority of them (89%) had 3 or more organs dysfunction. The APACHE II score on admission was 26 points. Community acquired infections were the most frequent cause of severe sepsis (53%). Most of the pathogens responsible for infection were Gram-negative bacteria (58%). Gram-positive bacteria were identified in 34% of patients and fungi in 16%. A positive blood culture was detected in 41% of patients. Vasopressors were administered to most of the patients (86%). There was a marked increase in the frequency of administering noradrenaline and a decrease in administering dopamine. Renal replacement therapy was applied in 22% of the patients, and there was a marked increase in this type of therapy in the last two years of the study period. CONCLUSIONS Patients with severe sepsis involved in the 7-year registry were critically ill in half of the cases because of intra-abdominal infections, and the majority of them had multi-organ dysfunction. The mortality of registered patients was high, but it significantly decreased during the observation time. Based on the results obtained from this voluntary registry, the authors conclude that mandated sepsis registries should be established in Polish hospitals to improve the strategy of diagnosing and managing this syndrome.

Severe sepsis in intensive care units in Poland--a point prevalence study in 2012 and 2013.

BACKGROUND Severe sepsis is associated with a high mortality rate, but the detailed epidemiology of sepsis is not well known in Polish hospitals. The aim of the study was to determine the prevalence and incidence of severe sepsis in Polish intensive care units (ICUs). METHODS Two one-day, point-prevalence studies were performed on March 8th, 2012 and March 13th, 2013. An online questionnaire was sent to 320 accredited ICUs. Demographic data regarding hospitals, ICUs, number of patients with severe sepsis and septic shock, and number of patients mechanically ventilated with a central catheter or a urinary catheter were collected. The one-day prevalence of severe sepsis in ICUs was calculated, and the annual incidence of severe sepsis in Poland was estimated from the prevalence rate and the mean length of stay in ICUs. RESULTS 1398 patients participated in the study in 2012, which accounted for 50% of all ICU beds registered by the National Health Care (NHC) system; 860 patients participated in 2013 (30% of all ICU beds). The daily prevalence of severe sepsis in ICUs was 26% in 2012 and 22% in 2013. Based on the data provided by the NHC system, the number of severe sepsis patients treated in accredited ICUs in Poland amounted to 24,905 patients per year, and the incidence of severe sepsis was 65/100,000 cases per year. CONCLUSIONS Severe sepsis was observed in one-fourth of patients treated in ICUs in Poland. However, the actual number of severe sepsis patients is at least 2 times higher because many patients with severe sepsis were treated outside accredited ICUs. Severe sepsis constitutes a major health problem in Poland.

Immunomodulatory properties of human recombinant lactoferrin in mice: Implications for therapeutic use in humans

BACKGROUND Trauma and major surgery cause extensive immune hyporeactivity in patients. Thus, the preventive, preoperative application of immunoregulatory therapeutics may normalize this immune reactivity and decrease morbidity and mortality in these subjects. OBJECTIVES The aim of this study was to investigate the immunomodulatory actions of recombinant human lactoferrin (rhLF) in mice, and to relate these effects to in vitro actions of rhLF on tumor necrosis factor alpha (TNF-α) production in lipopolysaccharide-stimulated whole blood cell cultures (LPS-stimulated WBCC) from patients admitted to intensive care units. MATERIAL AND METHODS BALB/c and CBA mice were used. rhLF was tested for allergic response to ovalbumin (OVA), delayed-type hypersensitivity (DTH) to OVA, and carrageenan-induced inflammation in an air pouch. Blood samples from 30 patients diagnosed with severe sepsis/septic shock (Apache II 21 ±1, mortality rate 40%) were collected on days 1, 3 and 5 of observation. The effects of rhLF on LPS-induced TNF-α production were measured in WBCCs. RESULTS Recombinant human lactoferrin reduced the parameters of OVA-induced inflammation and inhibited the elicitation phase of DTH and carrageenan-induced inflammation in mice. The majority of patients from whom whole blood cell cultures (WBCC) were established showed a strong hyporeactivity to LPS upon admission. rhLF exerted differential effects on the production of LPS-induced TNF-α in those cultures on days 1, 3 and 5 of observation. Cytokine production was upregulated only in patients with sustained anergy to LPS, and inhibited or unchanged in moderately reactive patients. CONCLUSIONS Evidence for the potential preventive or therapeutic utility of rhLF in patients with impaired immune reactivity has been demonstrated.

Effect of universal chlorhexidine decolonisation on the infection rate in intensive care patients

BACKGROUND Healthcare-associated infections (HAIs), particularly intensive care unit-acquired infections (HAI-ICU), are an important cause of morbidity and mortality in hospitals. Most of these infections are caused by multidrugresistant organisms. The results of recent studies have suggested that daily bathing with chlorhexidine (CHX)-universal decolonisation can prevent ICU infections. The purpose of the study was to determine the influence of CHX bathing on the rate and type of HAI-ICU in critically ill patients. METHODS This observational study, conducted in a mixed, 16-bed tertiary ICU, compared the following three 3-month periods: I) pre-intervention (traditional soap-water bathing), II) intervention (bathing with 2% CHX clothes), and III) post-intervention (soap-water bathing). The type and rate of HAI-ICU were registered according to the European Centre for Disease Prevention and Control (ECDC) guidelines. RESULTS A total of 272 patients were included in the study. During the intervention period, the total infection rate was significantly lower than in the pre-intervention period (12.7% vs 22.2%, respectively). Significant decreases in the rate and density of catheter-related infections (CRI) were observed during the intervention period. A decrease in the isolation rate of multidrug-resistant bacteria was also observed during the intervention and post-intervention periods. CONCLUSIONS Daily bathing of ICU patients with chlorhexidine-impregnated clothes significantly decreased the rate of HAI-ICU and the acquisition of CRI. This simple hygienic approach can be an important adjunctive intervention with the capability of reducing the burden of healthcare-associated infections in ICUs.

Coagulation abnormalities identified by thromboelastometry in patients with severe sepsis: the relationship to endotoxemia and mortality.

The aim of this study was to monitor the development of coagulation abnormalities in patients with severe sepsis using thromboelastometry and to assess whether increased endotoxin activity was associated with a change in coagulation. Data collected on ICU admission, day 2, 3, and 4 were analysed in 61 patients. Thromboelastometry made it possible to identify patients with a normal (group 1), hypercoagulable (group 2), or hypocoagulable (group 3) pattern. The best accuracy of thromboelastometry parameters as potential indices of coagulation abnormalities was yielded by the clot formation time and maximum clot firmness. The mortality rate was low in group 1(16%) and the presence of abnormalities, indicating either a hyper or hypocoagulation pattern, was associated with significantly higher mortality (42 and 39% respectively; P = 0.05). In group 1, baseline endotoxin activity was low [0.22 endotoxin activity units (EAU), 0.15–0.43] and did not change significantly during the observation period. In group 2, baseline endotoxin activity was elevated (0.52 EAU (0.39–0.62)) and remained high on day 2, 3, and 4. In group 3, baseline endotoxin activity was elevated (0.56 EAU (0.28–0.80)) and similarly to group 2, remained high on day 2, 3, and 4. The presence of coagulation disorders indicates a high-risk subpopulation of critically ill patients as reflected in significantly higher mortality rates and increased endotoxin activity.