Effects of mechanical insufflation-exsufflation on ventilator-free days in intensive care unit subjects with sputum retention; a randomized clinical trial.

BACKGROUND: Mechanical insufflation-exsufflation (MI-E) facilitates extubation. However, its potential to reduce the duration of ventilator use remains unclear. Therefore, the present study investigated whether the use of MI-E shortened the duration of mechanical ventilation in patients with high sputum retention. METHODS: A randomized open-label trial was conducted at a single intensive care unit (ICU) in Japan between November 2017 and June 2019. Ventilated subjects requiring suctioning at least once every hour due to sputum retention were randomly assigned to the MI-E group or conventional care group. The primary endpoint was the number of ventilator-free days on day 28. Secondary endpoints were ventilator days in surviving subjects, the length of ICU stay, and mortality and tracheostomy rates among survivors. RESULTS: Forty-eight subjects (81% males) with a median age of 72 years (interquartile range [IQR], 65-85 years) were enrolled. There were 27 subjects in the MI-E group and 21 in the control group. The median number of ventilator-free days was 21 (IQR, 13-24) and 18, respectively (IQR, 0-23) (P = .38). No significant differences were observed in the ICU length of stay (median, 10 days (IQR, 7-12) vs 12 days (IQR, 6-15); P = .31), mortality rate (19% vs 15%; odds ratio [OR], 1.36 [0.28-6.50]; P = .69), or tracheostomy rate among survivors (14% vs 28%; OR, 0.40 [0.08-1.91]; P = .25). CONCLUSION: In ventilated subjects in the ICU with high sputum retention, the use of MI-E did not significantly increase the number of ventilator-free days over that with conventional care.

Effectiveness of Minitracheostomy After Extubation in Patients with Pneumonia at High Risk of Reintubation: A Case Series.

Introduction: Minitracheostomy involves the percutaneous insertion of a 4-mm-diameter cricothyroidotomy tube for tracheal suctioning to facilitate the clearance of airway secretions. The advantage of using the minitracheostomy is in the clearance of secretions, however data on their usefulness for respiratory failure after extubation is limited. Aim of the study: We aimed to assess the use of minitracheostomy for patients with challenging extubation caused by significant sputum. Material and Methods: We conducted a retrospective analysis of consecutive case series. We analyzed the data of 31 patients with pneumonia. After minitracheostomy, the primary endpoints of reintubation within 72 hours and clinical effects, including mortality, length of intensive care unit (ICU), or hospital stay, were assessed. The successful extubation group included patients who did not require reintubation within 72 hours. Conversely, the reintubation group consisted of patients mandating reestablishment of intubation within 72 hours. Results: Among those who underwent minitracheostomy after extubation, 22 (71%) underwent successful extubation and 9 underwent reintubation (reintubation rate: 29%). The in-hospital mortality rates after 30 days were 18.2% in the successful extubation group and 22.2% in the reintubation group. The ICU and hospital lengths of stay were 11 days (interquartile range: 8-14.3 days) and 23 days (interquartile range: 15.5-41 days), respectively, in the successful extubation group; they were 14 days (interquartile range: 11-18.5 days) and 30 days (interquartile range: 16-45.5 days), respectively, in the reintubation group. Conclusions: The prophylactic use of minitracheostomy may be an option as a means of reducing reintubation in patients with pneumonia who are at very high risk of reintubation.

Explorative Clustering of the Nitrogen Balance Trajectory in Critically Ill Patients: A Preliminary post hoc Analysis of a Single-Center Prospective Observational Study.

BACKGROUND: The nitrogen balance estimates a protein net difference. However, since it has a number of limitations, it is important to consider the trajectory of the nitrogen balance in the clinical course of critically ill patients. OBJECTIVES: We herein exploratively classified the nitrogen balance trajectory using a machine learning method. METHOD: This is a post hoc analysis of a single-center prospective study for the patients admitted to our Emergency and Critical Center ICU. The nitrogen balance was evaluated with 24-h urine collection from ICU days 1-10 with 9 points. K-means clustering was performed to classify the nitrogen balance trajectory. We also evaluated factors associated with uncovered clusters. RESULTS: Seventy-six eligible patients were included in the present study. After clustering, the nitrogen balance trajectory was classified into 4 classes. Class 1 was trajected as a negative balance over 10 days (24 patients). Class 2 had a positive conversion on day 3 or 4 (8 patients). Class 3 had a positive conversion on day 8 or 9 (28 patients). Class 4 initially had a positive balance and then converted to a negative balance (16 patients). Sepsis complication and steroid use were associated with negative nitrogen balance trajectory. Class 2 was associated with lower length of hospital stay and femoral muscle volume loss, however, frequently had frailty and sarcopenia on admission. Active nutrition therapy intention was not correlated with positive trajectory. CONCLUSIONS: The nitrogen balance trajectory in critically ill patients may be classified into 4 classes for clinical practice. Among patients emergently admitted to the ICU, the positive conversion of the nitrogen balance might be delayed over 10 days.

The Vasopressin Loading for Refractory septic shock (VALOR) study: a prospective observational study.

BACKGROUND: Vasopressin is a second-line vasoactive agent for refractory septic shock. Vasopressin loading is not generally performed because of the lack of evidence for its effects and safety. However, based on our previous findings, we hypothesized it can predict the responsibility to vasopressin infusion with safety, and prospectively examined it in the present study. METHODS: Vasopressin loading was performed via the intravenous administration of a bolus of 1 U, followed by its continuous infusion at 1U/h in patients with septic shock treated with ≥ 0.2 µg/kg/min noradrenaline. An arterial pressure wave analysis was conducted, and endocrinological tests were performed immediately prior to vasopressin loading. We classified patients into responders/non-responders based on mean arterial pressure (MAP) changes after vasopressin loading. Based on our previous findings, the lower tertile of MAP changes was selected as the cut-off. The change in the catecholamine index (CAI) after 6 h was assigned as the primary outcome. Digital ischemia, mesenteric ischemia, and myocardial ischemia during the admission period were prospectively and systematically recorded as adverse events. RESULTS: Ninety-two patients were registered during the study period and examined. Sixty-two patients with a MAP change > 22 mmHg were assigned as responders and the others as non-responders. Blood adrenocorticotropic hormone levels were significantly higher in non-responders. Stroke volume variations were higher in responders before loading, while stroke volume and dP/dtmax were higher in responders after loading. Median CAI changes were - 10 in responders and 0 in non-responders, which was significantly lower in the former (p < 0.0001). AUROC of MAP change with vasopressin loading to predict CAI change < 0 after continuous infusion was 0.843 with sensitivity of 0.92 and specificity of 0.77. Ischemia events were observed in 5 cases (5.4%). CONCLUSIONS: Vasopressin loading may be safely introduced for septic shock. Vasopressin loading may be used to predict responses to its continuous infusion and select appropriate strategies to increase blood pressure.

Relationship between grip strength during hospitalisation and mental disorders after discharge in critically ill patients: a post-hoc analysis of a prospective observational study.

OBJECTIVES: Post-intensive care syndrome (PICS) is a recognised sequela after critical care. The development of an index that predicts PICS mental disorders will be of significance for the selection of subsequent interventions. The purpose of this study was to find factors associated with PICS mental disorders. We hypothesised that grip strength during hospitalisation may be associated with the PICS mental status after discharge. DESIGN: A post-hoc analysis of a multicentre prospective observational study. SETTING: Nine hospitals in Japan. PARTICIPANTS: Patients who were newly admitted to intensive care unit and stayed for at least 48 hours were included. Exclusion criteria were patients younger than 18 years, those who required assistance with ambulation prior to admission, those with concomitant central nervous system disorders and those with terminal conditions. PRIMARY AND SECONDARY OUTCOME MEASURES: Psychiatric symptoms 3 months after discharge were assessed using the Hospital Anxiety and Depression Scale (HADS). The HADS total score (HADS-total) was assigned as the primary outcome. RESULTS: 98 patients were included into this study. Grip strength at discharge negatively correlated with HADS-total 3 months after discharge (r=-0.37, p<0.001, 95% CI -0.53 to -0.18). A multivariate analysis showed that grip strength was associated with anxiety (p=0.025, 95% CI -0.21 to -0.015). Area under the curve for HADS anxiety score with grip strength at discharge was higher than that with Medical Research Council scores and the Barthel Index (0.71, 0.60, 0.61). CONCLUSIONS: Grip strength at discharge correlated with mental disorders 3 months after discharge. Therefore, it may be useful for predicting postdischarge mental disorders. TRIAL REGISTRATION NUMBER: UMIN000036503.

The nitrogen load is affected by high protein provision according to kidney function in critically ill patients.

Adequate protein delivery is recommended in the acute phase of critical illness with kidney dysfunction. However, the influence of the protein and nitrogen loads has not yet been clarified. Patients admitted to the intensive care unit were included. In the former period, patients received standard care (0.9 g/kg/day protein). In the latter, patients received the intervention of active nutrition therapy with high protein delivery (1.8 g/kg/day protein). Fifty patients in the standard care group and 61 in the intervention group were examined. Maximum blood urea nitrogen (BUN) on days 7-10 were 27.9 (17.3, 38.6) vs 33 (26.3, 51.8) (mg/dl) (p = 0.031). The maximum difference in BUN increased [31.3 (22.8, 55) vs 50 (37.3, 75.9) mg/dl (p = 0.047)] when patients were limited to an estimated glomerular filtration rate (eGFR) <50 ml/min/1.73 m2. This difference increased further when patients were limited to eGFR <30 ml/min/1.73 m2. No significant differences were observed in maximum Cre or in the use of RRT. In conclusion, the provision of 1.8 g/kg/day protein was associated with an increase in BUN in critically ill patients with kidney dysfunction; however, it was tolerated without the need for RRT.

Coagulopathy correlates with muscle titin injury in critically ill patients.

PURPOSE: We hypothesized that coagulopathy independently contributes to muscle injury focusing to titin fragmentation, and investigated their correlations. MATERIAL AND METHODS: We conducted a post-hoc analysis of an observational study, in which we evaluated muscle injury with the biomarker titin. Coagulopathy was assessed on the first day using the Japanese diagnostic criteria of acute-phase disseminated intravascular coagulopathy (JAAM-DIC). Mean N-titin/Cre measured on days 1, 3, 5, and 7 was assigned as the primary outcome. RESULTS: Overall, 111 eligible patients were included. Mean N-titin/Cre were significantly higher in the JAAM-DIC group. A multivariable analysis identified JAAM-DIC as independent risk factors for mean N-titin/Cre while other severity scores were not. CONCLUSIONS: Coagulopathy correlated with muscle titin fragmentation, as an independent risk factor. TRIAL REGISTRATION NUMBER: The present study is registered at the University Hospital Medical Information Network-clinical trials registry (UMIN000040290, Registration date: May 7, 2020).

Levetiracetam versus fosphenytoin as a second-line treatment after diazepam for adult convulsive status epilepticus: a multicentre non-inferiority randomised control trial.

OBJECTIVE: Status epilepticus (SE) is an emergency condition for which rapid and secured cessation is crucial. Although fosphenytoin (FPHT) is recommended as a second-line treatment, levetiracetam (LEV) reportedly has similar efficacy, but higher safety. Therefore, we herein compared LEV with FPHT in adult SE. METHODS: We initiated a multicentre randomised control trial in emergency departments with adult patients with convulsive SE. Diazepam was initially administered, followed intravenously by FPHT at 22.5 mg/kg or LEV at 1000-3000 mg. The primary outcome was assigned as the seizure cessation rate within 30 min of the administration of the study drug. RESULTS: A total of 176 adult patients with SE were enrolled (82 FPHT and 94 LEV), and 3 were excluded from the full analysis set. Seizure cessation rates within 30 min were 83.8% (67/80) in the FPHT group and 89.2% (83/93) in the LEV group. The difference in these rates was 5.5% (95% CI -4.7 to 15.7, p=0.29). The non-inferiority of LEV to FPHT was confirmed with p<0.001 by the Farrington-Manning test. No significant differences were observed in the seizure recurrence rate or intubation rate within 24 hours. Serious adverse events developed in three patients in the FPHT group and none in the LEV group (p=0.061). CONCLUSION: The efficacy of LEV was similar to that of FPHT for adult SE following the administration of diazepam. LEV may be recommended as a second-line treatment for SE along with phenytoin/FPHT. TRIAL REGISTRATION NUMBER: jRCTs031190160.

Impact of oligomeric enteral nutrition with low-molecular-weight whey peptides on diarrhea in critical care nutrition.

Diarrhea is one of the most common complications associated with enteral nutrition in hospitalized patients. Oligomeric enteral nutrition has been considered to reduce the incidence of diarrhea. We herein introduced and examined the effects of a specific oligomeric enteral nutrition with the low-molecular-weight whey peptides, Peptino|® in critically ill patients with refractory diarrhea or at high risk of mesenteric ischemia. A retrospective study of a consecutive case series was conducted. Patients were divided into two groups: enteral nutrition products were switched to Peptino|® (switching group) and Peptino|® was the initial enteral nutrition product (first initiation group). Sixty-eight patients were administered Peptino|® in the ICU. Diarrhea occurred in 28.3% of patients in the switching group and 13.3% in the first initiation group. EN failure with gastrointestinal intolerance was observed in 6 patients (8.8%). Diarrhea resolved in 29 out of the 35 patients (82.9%) with diarrhea prior to the switch to Peptino|®. Diarrhea cessation within 24 h of the initiation of Peptino|® was achieved in 11 patients (31.4%) and within 24-48 h in 12 (34.3%). Mesenteric ischemia was not detected in any patients. In conclusion, Peptino|® may be effective against diarrhea and gastrointestinal intolerance in critical care nutrition.

Evaluation of Intravascular Volume Using the Internal Jugular Vein Cardiac Collapse Index in the Emergency Department: A Preliminary Prospective Observational Study.

A non-invasive method for assessment of intravascular volume for optimal fluid administration is needed. We here conducted a preliminary study to confirm whether cardiac variation in the internal jugular vein (IJV), evaluated by ultrasound, predicts fluid responsiveness in patients in the emergency department. Patients who presented to the emergency department between August 2019 and March 2020 and required infusions were enrolled. We recorded a short-axis video of the IJV, respiratory variability in the inferior vena cava and stroke volume variations using the ClearSight System (Edwards Lifesciences, Irvine, CA, USA) before infusion of 500 mL of crystalloid fluid. Cardiac variations in the cross-sectional area of the IJV were measured by speckle tracking. Among the 148 patients enrolled, 105 were included in the final analysis. Fluid responsiveness did not correlate with the cardiac collapse index (13.6% vs. 16.8%, p = 0.24), but correlated with stroke volume variations (12.5% vs. 15.6%, p = 0.026). Although it is a simple correction, the cardiac collapse index correlated with stroke volume corrected by age (r = 0.25, p = 0.01), body surface area (r = 0.33, p = 0.002) and both (r = 0.35, p = 0.001). Cardiac variations in the IJV did not predict fluid responsiveness in the emergency department, but may reflect stroke volume.

Novel protocol combining physical and nutrition therapies, Intensive Goal-directed REhabilitation with Electrical muscle stimulation and Nutrition (IGREEN) care bundle.

BACKGROUND: Although the combination of rehabilitation and nutrition may be important for the prevention of intensive care unit (ICU)-acquired weakness, a protocolized intervention of this combination has not yet been reported. We herein developed an original combined protocol and evaluated its efficacy. METHODS: In this single-center historical control study, we enrolled adult patients admitted to the ICU. Patients in the control group received standard care, while those in the intervention group received the protocol-based intervention. The ICU mobility scale was used to set goals for early mobilization and a neuromuscular electrical stimulation was employed when patients were unable to stand. The nutritional status was assessed for nutritional therapy, and target calorie delivery was set at 20 or 30 kcal/kg/day and target protein delivery at 1.8 g/kg/day in the intervention group. The primary endpoint was a decrease in femoral muscle volume in 10 days assessed by computed tomography. RESULTS: Forty-five patients in the control group and 56 in the intervention group were included in the analysis. Femoral muscle volume loss was significantly lower in the intervention group (11.6 vs 14.5%, p = 0.03). The absolute risk difference was 2.9% (95% CI 0.1-5.6%). Early mobilization to a sitting position by day 10 was achieved earlier (p = 0.03), and mean calorie delivery (20.1 vs. 16.8 kcal/kg/day, p = 0.01) and mean protein delivery (1.4 vs. 0.8 g/kg/day, p < 0.01) were higher in the intervention group. CONCLUSION: The protocolized intervention, combining early mobilization and high-protein nutrition, contributed to the achievement of treatment goals and prevention of femoral muscle volume loss. TRIAL REGISTRATION NUMBER: The present study is registered at the University Hospital Medical Information Network-clinical trials registry (UMIN000040290, Registration date: May 7, 2020).

Grip Strength Correlates with Mental Health and Quality of Life after Critical Care: A Retrospective Study in a Post-Intensive Care Syndrome Clinic.

Post-intensive care syndrome (PICS) is characterized by several prolonged symptoms after critical care, including physical and cognitive dysfunctions as well as mental illness. In clinical practice, the long-term follow-up of PICS is initiated after patients have been discharged from the intensive care unit, and one of the approaches used is a PICS clinic. Although physical dysfunction and mental illness often present in combination, they have not yet been examined in detail in PICS patients. Grip strength is a useful physical examination for PICS, and is reported to be associated with mental status in the elderly. We herein investigated the relationship between grip strength and the mental status using data from our PICS clinic. We primarily aimed to analyze the correlation between grip strength and the Hospital Anxiety and Depression Scale (HADS) score. We also analyzed the association between grip strength and the EuroQol 5 Dimension (EQ5D) score as quality of life (QOL). Subjects comprised 133 patients who visited the PICS clinic at one month after hospital discharge between August 2019 and December 2020. Total HADS scores were 7 (4, 13) and 10 (6, 16) (p = 0.029) and EQ5D scores were 0.96 (0.84, 1) and 0.77 (0.62, 0.89) (p ≤ 0.0001) in the no walking disability group and walking disability group, respectively. Grip strength negatively correlated with HADS and EQ5D scores. Correlation coefficients were r = -0.25 (p = 0.011) and r = -0.47 (p < 0.0001) for HADS and EQ5D scores, respectively. Grip strength was a useful evaluation that also reflected the mental status and QOL.

Vasopressin Loading for Refractory Septic Shock: A Preliminary Analysis of a Case Series.

Background: Vasopressin is one of the strong vasopressor agents associated with ischemic events. Responses to the administration of vasopressin differ among patients with septic shock. Although the administration of a high dose of vasopressin needs to be avoided, the effects of bolus loading have not yet been examined. Since the half-life of vasopressin is longer than that of catecholamines, we hypothesized that vasopressin loading may be effective for predicting responses to its continuous administration. Methods: We retrospectively analyzed consecutive cases of septic shock for which vasopressin was introduced with loading under noradrenaline at >0.2 µg/kg/min during the study period. Vasopressin was administered in a 1 U bolus followed by its continuous administration at 1 U/h. The proportion of patients with a negative catecholamine index (CAI) change 6 h after the introduction of vasopressin was set as the primary outcome. We defined non-responders for exploration as those with a mean arterial pressure change <18 mmHg 1 min after vasopressin loading, among whom none had a change in CAI <0. Results: Twenty-one consecutive cases were examined in the present study, and included 14 responders and 7 non-responders. The primary outcome accounted for 71.4% of responders and 0% of non-responders, with a significant difference (p = 0.0039). Median CAI changes 2, 4, and 6 h after the administration of vasopressin were 0, -5, and -10 in responders and +20, +10, and +10 in non-responders, respectively. CAI was not reduced in any non-responder. Outcomes including mortality were not significantly different between responders and non-responders. Digital ischemia (1/21) and mesenteric ischemia (1/21) were observed. Conclusions: Vasopressin loading may predict responses to its continuous administration in septic shock patients. Further investigations involving a safety analysis are needed.

Urinary Titin N-Fragment Evaluation in a Randomized Controlled Trial of Beta-Hydroxy-Beta-Methylbutyrate for Acute Mild Trauma in Older Adults.

The effects of beta-hydroxy-beta-methylbutyrate (HMB) complex administration and the significance of titin, a biomarker of muscle injury, in elderly minor trauma patients in acute phase has not been established. In this single-center, randomized controlled study, trauma patients aged ≥ 70 years with an injury severity score < 16 were included. Titin values on days 1 and 3 were measured and the intervention group received HMB complex (2.4 g of HMB + 14 g of glutamine + 14 g of arginine) and the control group received glutamine complex (7.2 g of protein including 6 g of glutamine). The cross-sectional area of the rectus femoris (RFCSA) on ultrasound, grip strength, and the Barthel Index were assessed on the first day of rehabilitation and after 2 weeks. We analyzed 24 HMB and 25 control participants. Titin values on day 3 correlated with grip strength (r = -0.34, p = 0.03) and the Barthel Index (r = -0.39, p = 0.01) at follow-up. HMB complex supplementation had no effect on the RFCSA (2.41 vs. 2.45 cm2, p = 0.887), grip strength (13.3 vs. 13.1 kg, p = 0.946), or the Barthel Index (20.0 vs. 50.0, p = 0.404) at follow-up. Titin values might associate with subsequent physical function. Short-term HMB complex supplementation from acute phase did not ameliorate muscle injury.

High protein versus medium protein delivery under equal total energy delivery in critical care: A randomized controlled trial.

BACKGROUND: Appropriate protein delivery amounts during the acute phase of critical care are unknown. Along with nutrition, early mobilization and the combination are important. We conducted a randomized controlled trial during critical care to assess high-protein and medium-protein delivery under equal total energy delivery with and without active early rehabilitation. METHODS: ICU patients of August 2018-September 2019 were allocated to a high-protein group (target energy 20 kcal/kg/day, protein 1.8 g/kg/day) or a medium-protein group (target energy 20 kcal/kg/day, protein 0.9 g/kg/day) with the same nutrition protocol by day 10. By dividing the study period, standard rehabilitation was administered during the initial period. Rehabilitation with belt-type electrical muscle stimulation was given from day 2 in the latter as a historical comparison. Femoral muscle volume was evaluated on day 1 and day 10 using computed tomography. RESULTS: This study analyzed 117 eligible patients with similar characteristics assigned to a high-protein or medium-protein group. Total energy delivery was around 20 kcal/kg/day in both groups, but protein delivery was 1.5 g/kg/day and 0.8 g/kg/day. As a primary outcome, femoral muscle volume loss was 12.9 ± 8.5% in the high-protein group and 16.9 ± 7.0% in the medium-protein group, with significant difference (p = 0.0059). Persistent inflammation, immunosuppression, and catabolism syndrome were significantly less frequent in the high-protein group. Muscle volume loss was significantly less in the high-protein group only during the electrical muscle stimulation period. CONCLUSIONS: For critical care, high protein delivery provided better muscle volume maintenance, but only with active early rehabilitation. REGISTRATION: University Hospital Medical Information Network, UMIN000033783 Registered on 16 Aug 2018. https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000038538.

Hypoalbuminemia on Admission as an Independent Risk Factor for Acute Functional Decline after Infection.

The risk of acute functional decline increases with age, and concepts including frailty and post-acute care syndrome have been proposed; however, the effects of the nutritional status currently remain unclear. Patients admitted to the emergency department of Hitachi General Hospital for infectious diseases between April 2018 and May 2019 were included. To identify risk factors for functional decline at discharge, defined as Barthel Index <60, we investigated basic characteristics, such as age, sex, disease severity, the pre-morbid care status, and cognitive impairment, as well as laboratory data on admission, including albumin as a nutritional assessment indicator. In total, 460 surviving patients out of 610 hospitalized for infection were analyzed. In a multivariable logistic regression analysis, factors independently associated with Barthel Index <60 at discharge were age (adjusted OR 1.03, 95%CI 1.01-1.06, p = 0.022), serum albumin (adjusted OR: 0.63, 95%CI: 0.41-0.99, p = 0.043), and the need for care prior to admission (adjusted OR: 5.92, 95%CI: 3.15-11.15, p < 0.001). Hypoalbuminemia on admission in addition to age and the need for care prior to admission were identified as risk factors for functional decline in patients hospitalized for infection. Functional decline did not correlate with the severity of illness.

Diagnostic Value of Serum Procalcitonin in Patients with Convulsion in Emergency Department, an Observational Study.

Procalcitonin (PCT), a widely used biomarker for bacterial infections, is sometimes measured in convulsion patients to distinguish bacterial infections including bacterial meningitis. However, serum PCT elevation is reported in several other conditions. This study assessed the diagnostic value of serum PCT concentrations in convulsion patients. This study examined a convulsion group: patients admitted to our critical care center during April 2018 through September 2019 via the emergency department presenting with convulsions. Randomly sampled patients admitted without convulsions were categorized as a non-convulsion group. Serum PCT analysis was performed with consideration of whether or not the patient had an infection. Diagnostic values of serum PCT for bacterial infection were evaluated for convulsion and non-convulsion patients using the positive likelihood ratio of PCT. This study found 84 patients as eligible for the convulsion group; 1:2 matched 168 control patients were selected as non-convulsion group members. The positive likelihood ratio for bacterial infection was found to be significantly lower in the convulsion group than in the control group (1.94 vs. 2.65) when setting the positive cut-off for PCT as 0.5 ng/mL. Convulsion patients had a higher PCT value. The positive likelihood ratio for patients without bacterial infection was lower.