Acute and Critical Care

Original Articles

Infection
Serum lactate levels in cirrhosis and non-cirrhosis patients with septic shock: Surat Tongyoo, Kamonlawat Sutthipool, Tanuwong Viarasilpa, Chairat Permpikul; Acute Crit Care. 2022;37(1):108-117. Published online November 26, 2021; DOI: https://doi.org/10.4266/acc.2021.00332

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Background
In septic shock patients with cirrhosis, impaired liver function might decrease lactate elimination and produce a higher lactate level. This study investigated differences in initial lactate, lactate clearance, and lactate utility between cirrhotic and non-cirrhotic septic shock patients.
Methods
This is a retrospective cohort study conducted at a referral, university-affiliated medical center. We enrolled adults admitted during 2012–2018 who satisfied the septic shock diagnostic criteria of the Surviving Sepsis Campaign: 2012. Patients previously diagnosed with cirrhosis by an imaging modality were classified into the cirrhosis group. The initial lactate levels and levels 6 hours after resuscitation were measured and used to calculate lactate clearance. We compared initial lactate, lactate at 6 hours, and lactate clearance between the cirrhosis and non-cirrhosis groups. The primary outcome was in-hospital mortality.
Results
Overall 777 patients were enrolled, of whom 91 had previously been diagnosed with cirrhosis. Initial lactate and lactate at 6 hours were both significantly higher in cirrhosis patients, but there was no difference between the groups in lactate clearance. A receiver operating characteristic curve analysis for predictors of in-hospital mortality revealed cut-off values for initial lactate, lactate at 6 hours, and lactate clearance of >4 mmol/L, >2 mmol/L, and <10%, respectively, among non-cirrhosis patients. Among patients with cirrhosis, the cut-off values predicting in-hospital mortality were >5 mmol/L, >5 mmol/L, and <20%, respectively. Neither lactate level nor lactate clearance was an independent risk factor for in-hospital mortality among cirrhotic and non-cirrhotic septic shock patients.
Conclusions
The initial lactate level and lactate at 6 hours were significantly higher in cirrhosis patients than in non-cirrhosis patients.

Citations

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Serum lactate and mean arterial pressure thresholds in patients with cirrhosis and septic shock
Thomas N. Smith, Chansong Choi, Puru Rattan, Laura Piccolo Serafim, Blake A. Kassmeyer, Ryan J. Lennon, Ognjen Gajic, Jody C. Olson, Patrick S. Kamath, Alice Gallo De Moraes, Douglas A. Simonetto
Hepatology Communications.2024;[Epub] CrossRef
Norepinephrine dose, lactate or heart rate: what impacts prognosis in sepsis and septic shock? Results from a prospective, monocentric registry
Tobias Schupp, Kathrin Weidner, Jonas Rusnak, Schanas Jawhar, Jan Forner, Floriana Dulatahu, Lea Marie Brück, Ursula Hoffmann, Thomas Bertsch, Ibrahim Akin, Michael Behnes
Current Medical Research and Opinion.2023; 39(5): 647. CrossRef
Intensive care management of acute-on-chronic liver failure
Giovanni Perricone, Thierry Artzner, Eleonora De Martin, Rajiv Jalan, Julia Wendon, Marco Carbone
Intensive Care Medicine.2023; 49(8): 903. CrossRef

Trauma
Inclusion of lactate level measured upon emergency room arrival in trauma outcome prediction models improves mortality prediction: a retrospective, single-center study: Jonghwan Moon, Kyungjin Hwang, Dukyong Yoon, Kyoungwon Jung; Acute Crit Care. 2020;35(2):102-109. Published online May 31, 2020; DOI: https://doi.org/10.4266/acc.2019.00780

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Abstract PDF

Background
This study aimed to develop a model for predicting trauma outcomes by adding arterial lactate levels measured upon emergency room (ER) arrival to existing trauma injury severity scoring systems.
Methods
We examined blunt trauma cases that were admitted to our hospital during 2010– 2014. Eligibility criteria were cases with an Injury Severity Score of ≥9, complete Trauma and Injury Severity Score (TRISS) variable data, and lactate levels that were assessed upon ER arrival. Survivor and non-survivor groups were compared and lactate-based prediction models were generated using logistic regression. We compared the predictive performances of traditional prediction models (Revised Trauma Score [RTS] and TRISS) and lactate-based models using the area under the curve (AUC) of receiver operating characteristic curves.
Results
We included 829 patients, and the in-hospital mortality rate among these patients was 21.6%. The model that used lactate levels and age provided a significantly better AUC value than the RTS model. The model with lactate added to the TRISS variables provided the highest Youden J statistic, with 86.0% sensitivity and 70.8% specificity at a cutoff value of 0.15, as well as the highest predictive value, with a significantly higher AUC than the TRISS.
Conclusions
These findings indicate that lactate testing upon ER arrival may help supplement or replace traditional physiological parameters to predict mortality outcomes among Korean trauma patients. Adding lactate levels also appears to improve the predictive abilities of existing trauma outcome prediction models.

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Plasma interleukin responses as predictors of outcome stratification in patients after major trauma: a prospective observational two centre study
Matthew Allan Jones, James Hanison, Renata Apreutesei, Basmah Allarakia, Sara Namvar, Deepa Shruthi Ramaswamy, Daniel Horner, Lucy Smyth, Richard Body, Malachy Columb, Mahesan Nirmalan, Niroshini Nirmalan
Frontiers in Immunology.2023;[Epub] CrossRef
Admission Lactate and Base Deficit in Predicting Outcomes of Pediatric Trauma
Yo Huh, Yura Ko, Kyungjin Hwang, Kyoungwon Jung, Yoon-ho Cha, Yoo Jin Choi, Jisook Lee, Jung Heon Kim
Shock.2021; 55(4): 495. CrossRef

Trauma
The association between the initial lactate level and need for massive transfusion in severe trauma patients with and without traumatic brain injury: Young Hoon Park, Dong Hyun Ryu, Byung Kook Lee, Dong Hun Lee; Acute Crit Care. 2019;34(4):255-262. Published online November 29, 2019; DOI: https://doi.org/10.4266/acc.2019.00640

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Abstract PDF

Background
Exsanguination is a major cause of death in severe trauma patients. The purpose of this study was to analyze the prognostic impact of the initial lactate level for massive transfusion (MT) in severe trauma. We divided patients according to subgroups of traumatic brain injury (TBI) and non-TBI.
Methods
This single-institution retrospective study was conducted on patients who were admitted to hospital for severe trauma between January 2016 and December 2017. TBI was defined by a head Abbreviated Injury Scale ≥3. Receiver operating characteristic analysis was used to analyze the prognostic impact of the lactate level. Multivariate analyses were performed to evaluate the relationship between the MT and lactate level. The primary outcome was MT.
Results
Of the 553 patients, MT was performed in 62 patients (11.2%). The area under the curve (AUC) for the lactate level for predicting MT was 0.779 (95% confidence interval [CI], 0.742 to 0.813). The AUCs for lactate level in the TBI and non-TBI patients were 0.690 (95% CI, 0.627 to 0.747) and 0.842 (95% CI, 0.796 to 0.881), respectively. In multivariate analyses, the lactate level was independently associated with the MT (odds ratio [OR], 1.179; 95% CI, 1.070 to 1.299). The lactate level was independently associated with MT in non-TBI patients (OR, 1.469; 95% CI, 1.262 to 1.710), but not in TBI patients.
Conclusions
The initial lactate level may be a possible prognostic factor for MT in severe trauma. In TBI patients, however, the initial lactate level was not suitable for predicting MT.

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Association of initial lactate levels and red blood cell transfusion strategy with outcomes after severe trauma: a post hoc analysis of the RESTRIC trial
Yoshinori Kosaki, Takashi Hongo, Mineji Hayakawa, Daisuke Kudo, Shigeki Kushimoto, Takashi Tagami, Hiromichi Naito, Atsunori Nakao, Tetsuya Yumoto
World Journal of Emergency Surgery.2024;[Epub] CrossRef

Review

Cardiology/Infection
How Do I Integrate Hemodynamic Variables When Managing Septic Shock?: Olfa Hamzaoui, Jean-Louis Teboul; Korean J Crit Care Med. 2016;31(4):265-275. Published online November 30, 2016; DOI: https://doi.org/10.4266/kjccm.2016.00927

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Abstract PDF

Hemodynamic management of sepsis-induced circulatory failure is complex since this pathological state includes multiple cardiovascular derangements that can vary from patient to patient according to the degree of hypovolemia, of vascular tone depression, of myocardial depression and of microvascular dysfunction. The treatment of the sepsis-induced circulatory failure is thus not univocal and should be adapted on an individual basis. As physical examination is insufficient to obtain a comprehensive picture of the hemodynamic status, numerous hemodynamic variables more or less invasively collected, have been proposed to well assess the severity of each component of the circulatory failure and to monitor the response to therapy. In this article, we first describe the hemodynamic variables, which are the most relevant to be used, emphasizing on their physiological meaning, their validation and their limitations in patients with septic shock. We then proposed a general approach for managing patients with septic shock by describing the logical steps that need to be followed in order to select and deliver the most appropriate therapies. This therapeutic approach is essentially based on knowledge of physiology, of pathophysiology of sepsis, and of published data from clinical studies that addressed the issue of hemodynamic management of septic shock.

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Enhancement in Performance of Septic Shock Prediction Using National Early Warning Score, Initial Triage Information, and Machine Learning Analysis
Hyoungju Yun, Jeong Ho Park, Dong Hyun Choi, Sang Do Shin, Myoung-jin Jang, Hyoun-Joong Kong, Suk Wha Kim
The Journal of Emergency Medicine.2021; 61(1): 1. CrossRef

Original Articles

Favorable Outcomes in Septic Shock Patients without Hyperlactatemia or Severe Organ Failure: Sung Jong Roh, Tae Gun Shin, Kyeongman Jeon, Gee Young Suh, Min Seob Sim, So Yeon Lim, Mun Ju Kang, Keun Jeong Song, Yeon Kwon Jeong, Ik Joon Jo; Korean J Crit Care Med. 2012;27(4):224-229.; DOI: https://doi.org/10.4266/kjccm.2012.27.4.224

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Abstract PDF: BACKGROUND
Septic shock is a pathophysiologic state of circulatory failure with tissue hypoperfusion. However, it is usually defined as sepsis-induced hypotension not responding to fluid resuscitation, regardless of the objective findings of tissue hypoperfusion such as lactic acidosis or organ failures. Numerous patients with sepsis-induced hypotension present to the emergency department without hyperlactemia or severe organ failure. Hence, we investigated the clinical characteristics and outcomes of patients with septic shock according to the presence of hyperlactatemia or significant organ failure.
METHODS
We conducted a retrospective observational study of adult patients presenting with septic shock in the emergency department of a tertiary care hospital between August 2008 and July 2010. Initial serum lactate was categorized low (<2.5 mmol/L) and high (> or =2.5 mmol/L). Organ failure was assessed by the Sequential Organ Failure Assessment (SOFA) score. Primary outcome measurement was in-hospital mortality.
RESULTS
A total of 227 patients were enrolled. There were 88 (38.8%) patients in the low lactate group, and 139 (61.2%) patients in the high lactate group. Patients with low lactate levels showed a lower mortality rate (6.8% compared with 25.1% of those with high lactate level). The low lactate group showed less rapid heart rate, less severe organ failures and shorter length of stay in the intensive care unit. During the early goal-directed therapy, they required a smaller amount of fluid administration and a lower dose of norepinephrine although other hemodynamic variables were similarly maintained. In particular, if patients showed less severe organ dysfunction (SOFA score < 8) in the low lactate group (n = 45), in-hospital mortality was 0% (adjusted mortality was 1.3% [95% confidence interval = 0.3-5.0]).
CONCLUSION
Patients with septic shock, who were enrolled according to the traditional definition, showed a very favorable outcome if they did not have hyperlactatemia or significant organ failure.

Prognostic Factors for Mortality in Emergency Department Patients with Hypotension: Deuk Hyun Park, Young Rock Ha, Young Sik Kim, Tae Yong Shin, Sung Han Oh, Sung Sil Choi, Suk Young No; Korean J Crit Care Med. 2011;26(2):57-63.; DOI: https://doi.org/10.4266/kjccm.2011.26.2.57

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Abstract PDF

BACKGROUND
This study was performed to analyze the effects of differences between initial and follow up amounts of central venous oxygen saturation (Scvo2), lactate, anion gap (AG), and corrected anion gap (CAG).
METHODS
Patients with systolic blood pressure that was lower than 90 mmHg participated in this study. Along with Arterial Blood Gas Analysis (ABGA), the amounts of electrolytes, albumin, and Scvo2 were initially checked and then re-checked four hours later. The patients were divided into two groups, which were survived and expired, and the differences in initial and final values were compared in both groups. RESULTS: Out of a total of 36 patients, 29 patients survived and 7 patients died. The data showed almost no difference in mean age, mean arterial pressure, heart rate, respiratory rate, and body temperature between two groups. Comparing the initial amount, there was a statistically significant variation in lactate. Comparing the final values, lactate, AG, and CAG varied significantly. However, for both groups, the differences between the initial and final values were not significant. The area under curve (AUC) of follow up lactate and follow up CAG was 0.89 and 0.88. AUC of ED-APACHEII and original ICU APACHEII was 0.74 and 0.96.
CONCLUSIONS
There was no prognostic effect of Scvo2, lactate, AG, and CAG in hypotensive patients. The initial and final values of lactate and CAG were good prognostic factors for the expired group.

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Death below 2 g/dL of Hemoglobin Concentrations: As an Independent Predictor of Death
Sun Young Park, Sung Hyun Kang, Sang Hoon Park, Hea Rim Jeon, Mun Gyu Kim, Se Jin Lee
Soonchunhyang Medical Science.2013; 19(1): 45. CrossRef
Analysis of Prognostic Factors Early in Emergency Department (ED) and Late in Intensive Care Unit (ICU) of the Critically Ill Patients Admitted in the ICU via ED
Ru-Bi Jeong, Jung-Hwan An, Hyun-Min Jun, Sung-Min Jeong, Tae-Yong Shin, Young-Sik Kim, Young-Rock Ha
Korean Journal of Critical Care Medicine.2012; 27(4): 237. CrossRef

Association of Hyperlactatemia and IL-6 Hypercytokinemia after Cardiopulmonary Bypass: A Preliminary Report: Sang Hoon Yoon, Seung Zhoo Yoon, Hye Won Shin, Sung Uk Choi, Choon Hak Lim; Korean J Crit Care Med. 2011;26(1):18-23.; DOI: https://doi.org/10.4266/kjccm.2011.26.1.18

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Abstract PDF: BACKGROUND
In cardiac surgery with cardiopulmonary bypass (CPB), hyperlactatemia (HL) is common and is associated with postoperative morbidity and mortality. At present, the cause of HL during CPB is proposed to be tissue hypoxia. Tissue perfusion and oxygen delivery can be impaired to varying degrees during CPB. Although surgery involving CPB apparatus is associated with increased pro-inflammatory mediators, such as TNF-alpha and IL-6, tissue hypoxia that occurs during CPB may be an additionally potent stimulus to inflammation. We hypothesized that hypoxic patients during CPB that experience elevated serum lactate levels, may be related to higher serum cytokine level after CPB than normoxic patients during CPB with normal serum lactate levels.
METHODS
Levels of TNF-alpha and IL-6 were measured by ELISA in a) Time 1; before initiation of CPB, b) Time 2; 30 min after aortic de-clamping, c) Time 3; 24 hrs after aortic de-clamping. Levels of lactate was measured at a) Time A; before initiation of CPB, b) Time B; 30 min after aortic de-clamping. Postoperative ICU stay, intubation time and oxygen index were evaluated as postoperative morbidity scale.
RESULTS
There were no statistical differences between HL (n = 43, lactate > or =3 mMol/L at time B) and normal lactate group (NL) (n = 63, lactate <3 mMol/L at time B) in demographic data, preoperative left ventricular ejection fraction, CPB time, and aortic cross-clamp time. Level of IL-6 in HL at time 3 was higher than that of NL. The ICU stay and intubation time were longer in HL. The oxygen index on 1st postoperative day was lower in HL.
CONCLUSIONS
Our results suggest that hyperlactatemia after weaning from CPB may be related to IL-6 hypercytokinemia, and therefore related to postoperative morbidity.

The Usefulness of Lactate Clearance Adjusted to Time as a Predictive Index in Patients with Severe Sepsis and Septic Shock: Jung Hwan Ahn, Sang Cheon Choi, Young Gi Min, Yoon Seok Jung, Sung Hee Chung, Young Joo Lee; Korean J Crit Care Med. 2009;24(3):134-139.; DOI: https://doi.org/10.4266/kjccm.2009.24.3.134

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Abstract PDF

BACKGROUND
The lactate concentration should be used to examine the severity of sepsis or any state of shock. This study was conducted to investigate the prognostic power of the lactate clearance, as adjusted for time, between the survivors and nonsurvivors of patients with severe sepsis or septic shock.
METHODS
The study was performed on 67 patients over 16 years old and who were admitted to the intensive care unit (ICU) with severe sepsis or septic shock. They were divided into the survivors (n = 37) and nonsurvivors (n = 30). The blood lactate concentrations were assayed at intervals ranging from 8 to 24 hours and the APACHE III scoring was done daily for 2 weeks or until discharge or death. The lactate clearance, as adjusted for time, was defined using the following formula: [(the maximal lactate concentration - the normal lactate concentration)/the time to normalize the lactate concentration] x 1,000.
RESULTS
There were no significant differences of age, gender and the length of the ICU stay between the survivors and non-survivors. There were significant difference of the time to measuring the maximal serum lactate concentration (3.2 +/- 12.3 hours vs. 28.8 +/- 64.6 hours, respectively; p = 0.037), the lactate clearance, as adjusted for time (132.27 +/- 112.88 mol/L . hour vs. 59.67 +/- 72.60 mol/L . hour, respectively; p = 0.002), the lactate clearance during 24 hours (46.0 +/- 26.3% vs. 22.6 +/- 45.6%, respectively; p = 0.018) and the APACHE III score (67.6 +/- 22.7 vs. 83.9 +/- 21.6, respectively; p = 0.005) between the survivors and non-survivors. The lactate clearance, as adjusted for time and the APACHE III score were the predictive factors for survival on the logistic regression analysis (odd ratio 0.987; p = 0.028 vs. odd ratio 1.046; p = 0.006).
CONCLUSIONS
Lactate clearance, as adjusted for time, could be used as a prognostic index, as well as the APACHE III score, for patients with severe sepsis or septic shock.

Citations

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Lactate Clearance and Outcome in Septic Shock Patients with Low Level of Initial Lactate
Yun Su Sim, Cho Rom Hahm, So Yeon Lim, Gee Young Suh, Kyeongman Jeon
The Korean Journal of Critical Care Medicine.2011; 26(2): 78. CrossRef

The Study of Rescuer's Fatigue by Changes of Compression-Vetilation Ratio using Manikin Model of the One-Rescuer CPR: Hee Bum Yang, Young Mo Yang, Jong Wan Kim, Won Young Sung, Ho Lee, Jang Young Lee, Sung Youp Hong; Korean J Crit Care Med. 2006;21(2):116-125.

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Abstract PDF: BACKGROUND
The point of this study is focused on the rescuer's fatigue may increase as the ratio of chest compression-ventilation increases.
METHODS
10 students of emergency medical service and resucue had participated in this study. Cardiopulmonary resuscitation (CPR) was carried out with Laerdal's ResusciAnne with 4 types of compression-ventilation ratio (C-V ratio), and the data was recorded. The rescuer's fatigue was subjectively estimated with the visual analogue scale (VAS), objective fatigue was measured by median frequency which was acquired from the electromyography (EMG) signal, heart rate and the serum lactate level was measured. Statistical analysis was accomplished within each C-V ratios.
RESULTS
As C-V ratio increased from 15 : 2 to 30 : 2, the quality of chest compression was improved. Subjective fatigue was increased significantly when C-V ratio increased to 30 : 2 from 15 : 2 and to 60 : 2 from 45 : 2. Gradual downward transition of the median frequency on EMG was shown as a result of increments of C-V ratio. Significant serum lactate accumulation had shown on ratio of 60 : 2 compare to other ratios.
CONCLUSIONS
Fatigue of the rescuers will be aggravated by increase of C-V ratio. Rapid rescuer change is preferable when C-V ratio is increased.

Prognostic Implication of Serial Blood Lactate Concentrations in SIRS Patient: Young Joo Lee, Jong Seok Park, Bong Ki Moon, Hee Jung Wang; Korean J Crit Care Med. 2001;16(2):144-150.

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Abstract PDF: Introduction: Lactic acid in circulating blood should provide an index between balance of oxygen consumption and metabolic rate in sepsis or any state of shock. The purpose of the study was to determine the prognostic power of the lactate, the time factor of the blood lactate levels between survivors and non-survivors and the correlation between APACHE III score and blood lactate level in SIRS patients.
METHOD
The study was performed on 99 patients over 16 years old who were admitted to the SICU with the criteria of SIRS. The blood lactate concentrations were assayed with arterial blood drawn in intervals ranging from 4 to 24 hours and the APACHE III scoring was done in the first 24 hours of SICU admission and daily until discharge or death for 2 weeks. The highest lactate level of the day was recorded. They were divided into two groups, survivors (n=61) and non-survivors (n=38), according to the outcome.
RESULT
There were significant difference of the first day (D1) as well as peak lactate level between the survivors and the non-survivors (3.02 3.05 vs 7.41 4.78, 3.24 2.70 vs 7.82 4.88 mmol/L). Significant difference of the lactate as well as APACHE III were identified between the survivors and the non-survivors during a 14-days of observation period. Significant correlations were shown between lactate and APACHE III while the study was being conducted. The peak lactate presented superior to the D1 lactate in mortality prediction.
CONCLUSION
Blood lactate concentration could be used as a prognostic index as well as APACHE III score. Serial blood lactate concentration assays are necessary to predict the outcome.

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