Acute and Critical Care

Original Articles

Basic science and research
Specification of Subject Sex in Oncology-Related Animal Studies: Sukyo Lee, Won Jun Kim, Yeong Jeon, Choon Hak Lim, Kyung Sun; Acute Crit Care. 2018;33(3):178-184. Published online August 31, 2018; DOI: https://doi.org/10.4266/acc.2017.00444

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Background
Growing evidence for clinically significant differences between the sexes has attracted the attention of researchers. However, failures to report a test animal sex and balance the sex ratios of study samples remain widespread in preclinical investigations. We analyzed the sex-reporting rate and sex distributions of test animals in published oncology studies.
Methods
We selected five oncology journals included in the Scientific Citation Index (SCI) based on impact factors. We identified preclinical investigations with in vivo mouse experiments published in 2015 for inclusion in our study sample. We classified each article by whether or not it reported test subject sex, and by which sex was included. We also recorded whether there were justifications for using one particular sex in single-sex studies (e.g., anatomical reasons) and whether sex-based analyses were conducted for both-sex studies.
Results
We surveyed a total of 382 articles. Half (50.3%) failed to report test animal sex. Among articles that did report sex, 91.7% were single-sex studies, of which 69.4% did not provide any justifications for using the sex included in the study. Relatively few studies 15.7 studies included animals of both sexes, and only 2.3 studies conducted sex-based analyses. These findings are consistent with those of previous research that used other methods to collect data from the literature such as text mining, but our analysis of the provision of justifications for using one sex versus the other is a novel feature.
Conclusions
Many researchers overlook test subject sex as a factor, but test animal sex should be reported in all preclinical investigations to enhance the reproducibility of research and avoid faulty conclusions drawn from one-sided studies.

Citations

Citations to this article as recorded by

Pyrimethamine reduced tumour growth in pre-clinical cancer models: a systematic review to identify potential pre-clinical studies for subsequent human clinical trials
Sivananthan Manoharan, Lee Ying Ying
Biology Methods and Protocols.2024;[Epub] CrossRef

Thoracic Surgery
Clinical Characteristics of the Development of Pneumothorax in Mechanically Ventilated Patients in Intensive Care Units: Wan Chul Kim, Su Jin Lim, Kyong Young Kim, Seung Jun Lee, Yu Ji Cho, Yi Yeong Jeong, Mi Jung Park, Kyoung Nyeo Jeon, Jong Deog Lee, Young Sil Hwang, Ho Cheol Kim; Korean J Crit Care Med. 2014;29(1):13-18. Published online February 28, 2014; DOI: https://doi.org/10.4266/kjccm.2014.29.1.13

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Abstract PDF: Background
Pneumothorax (PTX) can occur as a complication of positive pressure ventilation in mechanically ventilated patients.
Methods
We retrospectively reviewed the clinical characteristics of patients who developed PTX during mechanical ventilation (MV) in the intensive care unit (ICU).
Results
Of the 326 patients admitted (208 men and 118 women; mean age, 65.3 ± 8.74 years), 15 (4.7%) developed PTX, which was MV-associated in 11 (3.3%) cases (6 men and 5 women; mean age, 68.3 ± 9.12 years) and procedure-associated in 4. Among the patients with MV-associated PTX, the underlying lung diseases were acute respiratory distress syndrome in 7 patients, interstitial lung disease in 2 patients, and chronic obstructive pulmonary disease in 2 patients. PTX diagnosis was achieved by chest radiography alone in 9 patients and chest computed tomography alone in 2 patients. Nine patients were using assist-control mode MV with the mean applied positive end-expiratory pressure, 9 ± 4.6 cmH₂O and the mean tidal volume, 361 ± 63.7 ml at the diagnosis of PTX. Two patients died as a result of MV-associated PTX and their systolic pressure was below 80 mmHg and heart rates were less than 80/min. Ten patients were treated by chest tube insertion, and 1 patient was treated by percutaneous pigtail catheter insertion.
Conclusions
PTX can develop in patients undergoing MV, and may cause death. Early recognition and treatment are necessary to prevent hemodynamic compromise in patients who develop PTX.

Case Report

Repeated Hypothermia for Rebound Cerebral Edema after Therapeutic Hypothermia in Malignant Cerebral Infarction: Jeong Ho Hong, Jin Heon Jeong, Jun Young Chang, Min Ju Yeo, Han Yeong Jeong, Hee Joon Bae, Moon Ku Han; Korean J Crit Care Med. 2013;28(3):221-224.; DOI: https://doi.org/10.4266/kjccm.2013.28.3.221

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Abstract PDF

Malignant cerebral infarction has a high risk of fatal brain edema and increased intracranial pressure with cerebral herniation causing death. One of the major causes of death is a rebound cerebral edema during rewarming phase. A 66-year-old male patient presented with the right hemiplegia and global aphasia due to malignant cerebral infarction in the whole territory of middle cerebral artery with the occlusion of the proximal internal carotid artery. Being refused decompressive hemicraniectomy, he received the therapeutic hypothermia for 6 days. After rewarming for 6 hours, mentality was suddenly decreased and dilated left pupil. Follow-up CT revealed that midline shifting was more aggravated. We decided on repeated hypothermia for rebound cerebral edema and successfully controlled. We report our experience with repeated hypothermia for rebound cerebral edema following therapeutic hypothermia in malignant cerebral infarction.

Citations

Citations to this article as recorded by

Dexmedetomidine Use in Patients with 33℃ Targeted Temperature Management: Focus on Bradycardia as an Adverse Effect
Hyo-yeon Seo, Byoung-joon Oh, Eun-jung Park, Young-gi Min, Sang-cheon Choi
The Korean Journal of Critical Care Medicine.2015; 30(4): 272. CrossRef
Therapeutic Hypothermia after Decompressive Craniectomy in Malignant Cerebral Infarction
Jun Young Chang, Jeong-Ho Hong, Jin-Heon Jeong, Sung-Jin Nam, Ji-Hwan Jang, Jae Seung Bang, Moon-Ku Han
Korean Journal of Critical Care Medicine.2014; 29(2): 93. CrossRef

Original Articles

Development of Acute Respiratory Failure on Initiation of Anti-Tuberculosis Medication in Patients with Pulmonary Tuberculosis: Clinical and Radiologic Features of 8 Patients and Literature Review: Su Jin Lim, Donghoon Lew, Haa Na Song, You Eun Kim, Seung Jun Lee, Yu Ji Cho, Yi Yeong Jeong, Mi Jung Park, Kyoung Nyeo Jeon, Ho Cheol Kim, Jong Deog Lee, Young Sil Hwang; Korean J Crit Care Med. 2013;28(2):108-114.; DOI: https://doi.org/10.4266/kjccm.2013.28.2.108

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Abstract PDF: BACKGROUND
Acute respiratory failure can occur paradoxically on initiation of anti-tuberculosis (TB) treatment in patients with pulmonary TB. This study is aimed to analyze the clinical features of anti-TB treatment induced acute respiratory failure.
METHODS
We reviewed the clinical and radiological characteristics of 8 patients with pulmonary tuberculosis (5 men and 3 women; mean age, 55 +/- 15.5 years) who developed acute respiratory failure following initiation of anti-TB medication and thus required mechanical ventilation (MV) in the intensive care unit (ICU).
RESULTS
The interval between initiation of anti-TB medication and development of MV-requiring acute respiratory failure was 2-14 days (mean, 4.4 +/- 4.39 days), and the duration of MV was 1-18 days (mean, 7.1 +/- 7.03 days). At admission, body temperature and serum levels of lactate dehydrogenase and C-reactive protein were increased. Serum levels of protein, albumin and creatinine were 5.8 +/- 0.98, 2.3 +/- 0.5 and 1.8 +/- 2.58 mg/ml, respectively. Radiographs characterized both lung involvements in all patients. Consolidation with the associated nodule was noted in 7 patients, ground glass opacity in 2, and cavitary lesion in 4. Micronodular lesion in the lungs, suggesting miliary tuberculosis lesion, was noted in 1 patient. At ICU admissions, the ranges of the APACHE II and SOFA scores were 17-38 (mean, 28.2 +/- 7.26) and 6-14 (mean, 10.1 +/- 2.74). The mean lung injury score was 2.8 +/- 0.5. Overall, 6 patients died owing to septic shock and multiorgan failure.
CONCLUSIONS
On initiation of treatment for pulmonary TB, acute respiratory failure can paradoxically occur in patients with extensive lung parenchymal involvement and high mortality.

The Clinical Significance of Weight Change in Mechanical Ventilated, Critically Ill Patients of ICU: Young Sun Seo, You Eun Kim, Seung Jun Lee, Yu Ji Cho, Yi Yeong Jeong, Ho Cheol Kim, Jong Deok Lee, Young Sil Hwang; Korean J Crit Care Med. 2011;26(3):139-144.; DOI: https://doi.org/10.4266/kjccm.2011.26.3.139

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Abstract PDF: BACKGROUND
Critically ill patients may show significant weight change in their course of disease during ICU stay. However, what weight changes occur and their effects on patient outcome have not yet been reported to our knowledge. Therefore, we evaluated weight change in critically ill patients in the medical ICU and the effect this may have on clinical outcome.
METHODS
We measured body weight in patients admitted to the medical ICU daily and evaluated their clinical characteristics and outcome.
RESULTS
Thirty-eight patients (M:F = 30:8, mean age = 65.7 +/- 12.5) were enrolled. Thirteen patients (34.2%) showed weight gain and the mean change was 12.8 +/- 4.2%. In contrast, 25 patients (65.8%) showed weight loss and the mean change was 6.3 +/- 6.9%. Patients who showed weight change over 5% or 10% were 26 (68.4%), and 12 (31.6%), respectively, and their mortality rates were 61.5% and 75%, respectively, showing no statistical significance (p > 0.05). However, when the degree of weight change was stratified with < 5%, 5-10% and > 10%, it was associated with death (p = 0.002). Factors like ICU stay, day of mechanical ventilation, initial APACHE II and SOFA score, body mass index (BMI) and serum albumin were not associated with more than 5% change of weight. BMI at admission was only associated with > 10% change of weight (p < 0.05).
CONCLUSIONS
The majority of critically ill patients showed a significant weight change during their ICU stay and these patients may have a tendency to have worse clinical outcome.

Change of Antibiotics Resistance Pattern of Microorganism Cultured in Tracheal Aspirate in Mechanical Ventilated Patients after Antibiotics Restriction Policy: Jeong Eun Ma, Soo Kyong Kim, Min Kyung Kang, Yi Yeong Jeong, Ho Cheol Kim, Jong Deok Lee, Young Sil Hwang; Korean J Crit Care Med. 2008;23(1):25-29.; DOI: https://doi.org/10.4266/kjccm.2008.23.1.25

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Abstract PDF

BACKGROUND
To reduce production of resistant bacteria by over-use of antibiotics, an antibiotics restriction policy became effective in several hospitals. However, there are different views on its effect. This study aims to examine antibiotic resistance of pathogenic organisms cultured in tracheal aspirates of the patients who need to maintain mechanical ventilation in medical intensive care unit before and after the antibiotics restriction policy.
METHODS
Before and after 2 years from August 2003, when carried out the antibiotics restriction policy in Gyeongsang university hospital, it was retrospectively investigated the antibiotic resistance pattern of bacteria cultured in tracheal aspirates of the patient who is maintained by mechanical ventilation more than 48 hours in the medical intensive care unit. Restricted antibiotics are ceftazidime, piperacillin/tazobactam, imipenem, meropenem, vancomycin, and teicoplanin.
RESULTS
Before the antibiotics restriction policy, (Sep 2001~Aug 2003) and after, (Sep 2003~Aug 2005), there were 306 and 565 patients applied in each case and the total use of antibiotics, except piperacillin/tazobactam, was reduced and that of cefotaxime and ceftriaxone was increased. There was no significant change in antibiotic resistance among Acinetobacter, Pseudomonas, and Enterobacter species.
CONCLUSION
The result of this study shows that the antibiotics restriction policy does not reduce production of antibiotic resistant bacteria in tracheal aspirate in a medical intensive care unit. However, it is considered that long-term observation may be necessary.

Citations

Citations to this article as recorded by

Clinical Characteristics in Patients with Carbapenem-ResistantAcinetobacter baumanniiIsolates from Tracheal Secretions
Jeong Ha Mok, Mi Hyun Kim, Kwangha Lee, Ki Uk Kim, Hye-Kyung Park, Min Ki Lee
Korean Journal of Critical Care Medicine.2013; 28(3): 173. CrossRef
Overview of Antibiotic Use in Korea
Baek-Nam Kim
Infection & Chemotherapy.2012; 44(4): 250. CrossRef

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