Effects of Ketamine Analgesia on Cardiorespiratory Responses and Survival to Trauma and Hemorrhage in Rats

2021 ◽  
Author(s):  
Harold G. Klemcke ◽  
Mariam L. Calderon ◽  
Stephen L. Crimmins ◽  
Kathy L. Ryan ◽  
Lusha Xiang ◽  
...  
Keyword(s):  
Blood Volume ◽  
Tissue Injury ◽  
Soft Tissue Injury ◽  
Minute Volume ◽  
Male Rats ◽  
Whole Body ◽  
Survival Times ◽  
Cardiorespiratory Responses ◽  
Cardiorespiratory Function ◽  
Fibular Fracture

Ketamine is the recommended analgesic on the battlefield for Soldiers with hemorrhage, despite a lack of supportive evidence from laboratory or clinical studies. Hence, this study determined the effects of ketamine analgesia on cardiorespiratory responses and survival to moderate (37% blood volume; n=8/group) or severe hemorrhage (50% blood volume; n=10/group) after trauma in rats. We used a conscious hemorrhage model with extremity trauma (fibular fracture + soft tissue injury) while measuring mean arterial pressure (MAP), heart rate (HR), and body temperature (Tb) by telemetry, and respiration rate (RR), minute volume (MV), and tidal volume (TV) via whole body plethysmography . Male rats received saline (S) or 5.0 mg/kg ketamine (K) (100 µl/100 gram body weight) intra-arterially after trauma and hemorrhage. All rats survived 37% hemorrhage. For 50% hemorrhage, neither survival times (180 min (SD 78) vs 209 min (SD 66) nor percent survival (60% vs 80%) differed between S and K-treated rats. After 37% hemorrhage, K (compared with S) increased MAP, and decreased Tb and MV. After 50% hemorrhage, K (compared with S) increased MAP but decreased HR and MV. K effects on cardiorespiratory function were time-dependent, significant but modest, and transient at the analgesic dose given. K effects on Tb were also significant but modest, and more prolonged. Using this rat model, our data support the use of K as an analgesic in injured, hypovolemic patients.

scholarly journals EFFICACY AND MECHANISM OF TRADITIONAL CHINESE MEDICINE GEL IN SPORTS-RELATED SOFT TISSUE INJURY

2021 ◽  
Vol 27 (spe2) ◽  
pp. 54-57
Author(s):  
Li Chen ◽  
Meiling Miao
Keyword(s):  
Chinese Medicine ◽  
Soft Tissue ◽  
Traditional Chinese Medicine ◽  
Prostaglandin E2 ◽  
Tissue Injury ◽  
Soft Tissue Injury ◽  
Male Rats ◽  
Control Group ◽  
Common Disease ◽  
Therapeutic Effects

ABSTRACT Soft tissue injury is the most common disease in orthopedics, and it is also the most easily neglected disease in sports. Without timely and effective treatment, it is easy to develop into malignant strain and seriously affect life and sports. In view of this, the aim of this study is to analyze the effect and mechanism of traditional Chinese medicine gel in treating such injuries in the light of the characteristics of sports-related soft tissue injury. The right gastrocnemius muscle injury was simulated in 36 adult male rats. Chinese medicine gel and tincture were used to treat it. The contents of interleukin, alanine aminotransferase, blood urea nitrogen and prostaglandin E2 in the blood of rats under different courses of treatment were analyzed to explore recovery in four rats. The results showed that the levels of interleukin and prostaglandin E2 in the blood of rats treated with drugs were significantly lower than those in the control group (p<0.05), indicating that both drugs have obvious therapeutic effects on soft tissue injury. The content of interleukin in the blood of the Chinese medicine gel group was slightly lower than that of the tincture group, indicating that the Chinese medicine gel could affect the recovery of soft tissue injury by affecting leukocyte interleukin. This result is helpful in the treatment of soft tissue injury in sports and to further improve the therapeutic effect of traditional Chinese medicine gel.

Fine Structural Changes in the Adenohypophyses of Rats Following Destruction of the Pituitary Stalk

1977 ◽  
Vol 35 ◽  
pp. 496-497
Author(s):  
K. Kovacs ◽  
E. Horvath ◽  
J. M. Bilbao ◽  
F. A. Laszlo ◽  
I. Domokos
Keyword(s):  
Structural Changes ◽  
Tissue Injury ◽  
Anterior Lobe ◽  
Uranyl Acetate ◽  
Male Rats ◽  
Pituitary Stalk ◽  
Sequence Of Events ◽  
Pituitary Glands ◽  
Electrolytic Lesions ◽  
Ultrathin Sections

Electrolytic lesions of the pituitary stalk in rats interrupt adenohypophysial blood flow and result in massive infarction of the anterior lobe. In order to obtain a deeper insight into the morphogenesis of tissue injury and to reveal the sequence of events, a fine structural investigation was undertaken on adenohypophyses of rats at various intervals following destruction of the pituitary stalk.The pituitary stalk was destroyed electrolytically, with a Horsley-Clarke apparatus on 27 male rats of the R-Amsterdam strain, weighing 180-200 g. Thirty minutes, 1,2,4,6 and 24 hours after surgery the animals were perfused with a glutaraldehyde-formalin solution. The skulls were then opened and the pituitary glands removed. The anterior lobes were fixed in glutaraldehyde-formalin solution, postfixed in osmium tetroxide and embedded in Durcupan. Ultrathin sections were stained with uranyl acetate and lead citrate and investigated with a Philips 300 electron microscope.

Auto seat restraint soft-tissue injury

1987 ◽  
Vol 148 (2) ◽  
pp. 458-458 ◽  
Author(s):  
DR Pennes ◽  
WA Phillips
Keyword(s):  
Soft Tissue ◽  
Tissue Injury ◽  
Soft Tissue Injury

scholarly journals Stamina-Enhancing Effects of Human Adipose-Derived Stem Cells

2021 ◽  
Vol 30 ◽  
pp. 096368972110354
Author(s):  
Eun-Jung Yoon ◽  
Hye Rim Seong ◽  
Jangbeen Kyung ◽  
Dajeong Kim ◽  
Sangryong Park ◽  
...  
Keyword(s):  
Physical Activity ◽  
Stem Cells ◽  
Locomotor Activity ◽  
Tissue Injury ◽  
Male Rats ◽  
Adipose Derived Stem Cells ◽  
Sprague Dawley ◽  
Serum Triglycerides

Stamina-enhancing effects of human adipose derived stem cells (hADSCs) were investigated in young Sprague-Dawley rats. Ten-day-old male rats were transplanted intravenously (IV) or intracerebroventricularly (ICV) with hADSCs (1 × 106 cells/rat), and physical activity was measured by locomotor activity and rota-rod performance at post-natal day (PND) 14, 20, 30, and 40, as well as a forced swimming test at PND 41. hADSCs injection increased the moving time in locomotor activity, the latency in rota-rod performance, and the maximum swimming time. For the improvement of physical activity, ICV transplantation was superior to IV injection. In biochemical analyses, ICV transplantation of hADSCs markedly reduced serum creatine phosphokinase, lactate dehydrogenase, alanine transaminase, and muscular lipid peroxidation, the markers for muscular and hepatic injuries, despite the reduction in muscular glycogen and serum triglycerides as energy sources. Notably, hADSCs secreted brain-derived neurotrophic factor (BDNF) and nerve growth factor in vitro, and increased the level of BDNF in the brain and muscles in vivo. The results indicate that hADSCs enhance physical activity including stamina not only by attenuating tissue injury, but also by strengthening the muscles via production of BDNF.

scholarly journals Acute Tissue Injury Caused by Subcutaneous Fat Biopsies Produces Endoplasmic Reticulum Stress

2009 ◽  
Vol 30 (7) ◽  
pp. 928-928
Author(s):  
Guenther Boden ◽  
Matthew Silviera ◽  
Brian Smith ◽  
Peter Cheung ◽  
Carol Homko
Keyword(s):  
Endoplasmic Reticulum ◽  
Er Stress ◽  
Tissue Injury ◽  
Subcutaneous Fat ◽  
Whole Body ◽  
Monocyte Chemoattractant Protein 1 ◽  
Homologous Protein ◽  
Stress Markers ◽  
Acute Tissue Injury ◽  
Glucose Regulated Protein

Abstract Background It is not known whether acute tissue injury is associated with endoplasmic reticulum (ER) stress. Objective Our objective was to determine whether open, sc fat biopsies cause ER stress. Approach Five healthy subjects underwent three open sc fat biopsies. The first biopsy, taken from the lateral aspect of a thigh, was followed 4 h later by a second biopsy from the same incision site and a third biopsy from the contralateral leg. Expression markers of ER stress, inflammation, hypoxia, and adipokines were measured in these fat biopsies. In addition, we tested for signs of systemic ER stress and inflammation in plasma and in circulating monocytes. Results mRNA/18s ratios of IL-6, monocyte chemoattractant protein-1, CD-14, hypoxia-induced factor 1-α, the spliced form of Xbox protein-1, glucose-regulated protein 78, CEBP homologous protein, and activating factor-4 were all severalfold higher, whereas mRNA/18s ratios of adiponectin and leptin were lower in fat biopsies taken from the same site 4 h after the first biopsy but were unchanged in the second biopsy that was taken from the contralateral site. The biopsies were not associated with changes in plasma and monocyte IL-6 concentrations or in monocyte ER stress markers. Also, whole-body insulin-stimulated glucose uptake was the same in 15 subjects who had biopsies compared with 15 different subjects who did not. Conclusion Open, sc fat biopsies produced inflammation, hypoxia, ER stress, and decreased expression of adiponectin and leptin. These changes remained confined to the biopsy site for at least 4 h.

Use of Continuous Blood Volume Monitoring to Detect Inadequately High Dry Weight

1996 ◽  
Vol 19 (7) ◽  
pp. 411-414 ◽  
Author(s):  
F. Lopot ◽  
P. Kotyk ◽  
J. Bláha ◽  
J. Forejt
Keyword(s):  
Blood Volume ◽  
Vena Cava ◽  
Extracellular Fluid ◽  
Dry Weight ◽  
Whole Body ◽  
The Status ◽  
Varying Length ◽  
Group 3 ◽  
Group 2 ◽  
Total Body

A continuous blood volume monitoring (CBVM) device (Inline Diagnostics, Riverdale, USA) was used to study response to prescribed ultrafiltration during haemodialysis (HD) in 66 stabilised HD patients. Fifty percent of patients showed the expected linear decrease in BV right from the beginning of HD (group 1), 32% exhibited no decrease at all (group 2), while eighteen percent formed the transient group 3 which showed a plateau of varying length after which a decrease occurred. The correct setting of dry weight was verified through evaluation of the ratio of extracellular fluid volume to total body water (VEC/TBW) in 26 patients by means of whole body multifrequency impedometry MFI (Xitron Tech., San Diego, USA) and through measurement of the Vena Cava Inferior diameter (VCID) pre and post HD (in 6 and 5 patients from groups 1 and 3 and from group 2, respectively). The mean VEC/TBW in groups 1 and 3 was 0.56 pre and 0.51 post HD as compared to 0.583 and 0.551 in group 2. VCID decreased on average by 14.1% in groups 1 and 3 but remained stable in group 2. Both findings thus confirmed inadequately high estimation of dry weight. Since CBVM is extremely easy to perform it can be used as a method of choice in detecting inadequately high prescribed dry weight. The status of the cardiovascular system must always be considered before final judgement is made.

Soft tissue injury associated with intravenous phenytoin in a neonate

1994 ◽  
Vol 83 (11) ◽  
pp. 1218-1219 ◽  
Author(s):  
N. Sharief ◽  
C. Goonasekera
Keyword(s):  
Soft Tissue ◽  
Tissue Injury ◽  
Soft Tissue Injury

Oestrogen protects against ischaemic acute renal failure in rats by suppressing renal endothelin-1 overproduction

2002 ◽  
Vol 103 (s2002) ◽  
pp. 434S-437S ◽  
Author(s):  
Masanori TAKAOKA ◽  
Mikihiro YUBA ◽  
Toshihide FUJII ◽  
Mamoru OHKITA ◽  
Yasuo MATSUMURA
Keyword(s):  
Renal Failure ◽  
Renal Function ◽  
Acute Renal Failure ◽  
Renal Dysfunction ◽  
Tissue Injury ◽  
Male Rats ◽  
Left Renal Artery ◽  
Protective Effects ◽  
Endothelin 1 ◽  
Ischaemia Reperfusion

We investigated whether the treatment with 17β-oestradiol has renal protective effects in male rats with ischaemic acute renal failure (ARF). We also examined if the effect of 17β-oestradiol is accompanied by suppression of enhanced endothelin-1 production in postischaemic kidneys. Ischaemic ARF was induced by clamping the left renal artery and vein for 45min followed by reperfusion, 2 weeks after contralateral nephrectomy. Renal function parameters such as blood urea nitrogen, plasma creatinine and creatinine clearance were measured to test the effectiveness of the steroid hormone. Renal function in ARF rats markedly decreased 24h after reperfusion. The ischaemia/reperfusion-induced renal dysfunction was dose-dependently improved by pretreatment with 17β-oestradiol (20 or 100µg/kg, intravenously). Histopathological examination of the kidney of untreated ARF rats revealed severe lesions, such as tubular necrosis, proteinaceous casts in tubuli and medullary congestion, all of which were markedly improved by the higher dose of 17β-oestradiol. In addition, endothelin-1 content in the kidney after the ischaemia/reperfusion increased significantly by approx. 2-fold over sham-operated rats, and this elevation was dose-dependently suppressed by the 17β-oestradiol treatment. These results suggest that oestrogen exhibits protective effects against renal dysfunction and tissue injury induced by ischaemia/reperfusion, possibly through the suppression of endothelin-1 overproduction in postischaemic kidneys.

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