Acute and Critical Care

Original Article

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

Case Report

Pneumocystis jiroveci Pneumonia in a 5-month-old Boy with Agammaglobulinemia: A Case Report: Bo Hyun Chung, Hyo Kyoung Nam, Young Jun Rhie, Kwang Chul Lee, Ji Tae Choung, Choon Hak Lim, Young Yoo; Korean J Crit Care Med. 2012;27(4):274-278.; DOI: https://doi.org/10.4266/kjccm.2012.27.4.274

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Abstract PDF: Pneumocystis jiroveci (P. jiroveci) pneumonia is known as a common opportunistic infection in patients with impaired immunity. Underlying disease or conditions related to the development of P. jiroveci pneumonia include acquired immunodeficiency syndromes, as well as malignancies and congenital immune deficiency disorders. We describe a 5-month-old boy without significant medical history who was admitted at our hospital because of fever, tachypnea, vomiting, diarrhea, and lethargy whose condition became worse within several hours after admission. A chest X-ray showed bilateral diffuse infiltration and high resolution computed tomography showed diffuse bilateral ground-glass opacity. The patient was diagnosed with P. jiroveci pneumonia by direct immunofluorescent antibody staining from lung biopsy and he was later diagnosed with agammaglobulinemia. Although the boy was treated with antibiotics, high-dose corticosteroids and mechanical ventilation, he expired on the 5th hospital day. Here, we report the case of P. jiroveci pneumonia in a boy with agammaglobulinemia.

Randomized Controlled Trial

The Analgesic Effect of Remifentanil on Propofol Injection Pain: Younghoon Jeon, Min Je Choi, Choon Hak Lim; Korean J Crit Care Med. 2011;26(4):212-216.; DOI: https://doi.org/10.4266/kjccm.2011.26.4.212

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Abstract PDF: BACKGROUND
Pain is a common side-effect of propofol injection. A remifentanil pretreatment has been reported to decrease the incidence and intensity of pain during a propofol injection and has been suggested to act through a central or peripheral effect. This trial was designed to explore the action site of remifentanil on reducing propofol injection pain, using the venous occlusion technique and a time interval between the applications of remifentanil and propofol.
METHODS
This randomized, double-blind study was designed to explore the action site of remifentanil on reducing propofol injection pain in 200 patients scheduled for elective surgery. The peripheral properties were examined using the venous occlusion technique for 30 s while a 1 min time interval between remifentanil and propofol injections was allowed for the central effect. Before the propofol injection, group A was pretreated with remifentanil (0.5 microg/ kg) with a venous occlusion, group B with remifentanil and a 1 min interval, and group C with remifentanil with a venous occlusion and a 1 min interval. Pain severity was assessed using a four-point scale.
RESULTS
40 patients (80%) complained of pain in the placebo group compared with 35 (70%) in group A, 20 (40%) in group B (p < 0.05) and 17 (34%) in group C (p < 0.05). The incidence and severity of propofol injection pain were lower in groups B and C than in group A (p < 0.05). However, there was no significant difference between groups B and C.
CONCLUSIONS
The remifentanil mediated analgesic effect occurs mainly through the central effect.

Original Articles

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.

Retrospective Analysis of the Postoperative Patients Admitted to General Surgical-Medical Intensive Care Unit: Jun Rho Yoon, Choon Hak Lim, Mi Jung Kim; Korean J Crit Care Med. 2008;23(1):18-24.; DOI: https://doi.org/10.4266/kjccm.2008.23.1.18

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Abstract PDF

BACKGROUND
The present study was designed to examine the purpose of intensive care unit (ICU) admission and the prevalence of disease in postoperative patients admitted to general surgical-medical ICU.
METHODS
Between 1 January 2007 and 31 December 2007, 646 cases of 612 patients admitted to a general postoperative patients admitted to general surgical-medical ICU were examined. The patients were classified into two groups, ICU treatment and ICU monitoring groups according to Knaus' suggestion which defines the kinds of treatment done exclusively in ICU. Patients' demographics, preoperative American Society of Anesthesiologists physical status classification (ASA) grade, prevalence of disease and emergent operation rate were analyzed.
RESULTS
255 patients (39.5%) were included in the ICU treatment group and 391 cases (60.5%) in the ICU monitoring group. The prevalence of respiratory, gastrointestinal, and central nervous diseases was higher significantly in the ICU treatment group. In addition, the average of ASA grade and the duration of operation were higher significantly in the ICU treatment group.
CONCLUSION
Admission rate only for monitoring was higher than one for intensive treatment. An alternative strategy should be considered to care for postoperative patients who need just close monitoring.

Citations

Citations to this article as recorded by

Retrospective investigation of anesthetic management and outcome in patients with deep neck infections
Tae Kwane Kim, Hye Jin Yoon, Yuri Ko, Yuna Choi, Ui Jin Park, Jun Rho Yoon
Anesthesia and Pain Medicine.2019; 14(3): 347. CrossRef

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