1.陆军第948医院普通外科,新疆维吾尔自治区塔城地区乌苏市
2.陆军特色医学中心(第三军医大学大坪医院)交通医学研究所,重庆
3.陆军军医大学(第三军医大学)基础医学院教学实验中心,重庆
MA Hai, E-mail: 13649988188@163.com
Received:16 April 2025,
Revised:2025-07-05,
Accepted:07 July 2025,
Published:15 September 2025
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岳永超,章利彬,周文奇,等.高寒环境暴露后大鼠不同强度肠道冲击伤的比较研究[J].陆军军医大学学报,2025,47(17):2071-2078.DOI:10.16016/j.2097-0927.202504066.
YUE Y C,ZHANG L B,ZHOU W Q,et al.Intestinal blast injuries after different intensity waveshock in rats exposure to extremely cold environment: a comparative study[J].J Army Med Univ,2025,47(17):2071-2078.DOI:10.16016/j.2097-0927.202504066.
岳永超,章利彬,周文奇,等.高寒环境暴露后大鼠不同强度肠道冲击伤的比较研究[J].陆军军医大学学报,2025,47(17):2071-2078.DOI:10.16016/j.2097-0927.202504066. DOI:
YUE Y C,ZHANG L B,ZHOU W Q,et al.Intestinal blast injuries after different intensity waveshock in rats exposure to extremely cold environment: a comparative study[J].J Army Med Univ,2025,47(17):2071-2078.DOI:10.16016/j.2097-0927.202504066. DOI:
目的
2
对高寒环境暴露后大鼠的不同强度肠道冲击伤进行比较,并对其损伤特点进行初步探究。
方法
2
选取体质量为200~250 g的2月龄健康雄性SD大鼠60只,按随机数字表法将大鼠分为6组(
n
=10):空白对照组、低温对照组、5.0 MPa冲击对照组、低温+4.0 MPa冲击组、低温+4.5 MPa冲击组和低温+5.0 MPa冲击组。低温+冲击组在-10 ℃低温环境预处理30 min后,立即采用BST-Ⅰ型生物激波管以不同驱动压冲击大鼠腹部致肠道损伤。检测致伤后3、8、24 h大鼠血清白介素-6(interleukin-6,IL-6)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、肠脂肪酸结合蛋白(intestinal-fatty acid binding protein, I-FABP)、二胺氧化酶(diamine oxidase, DAO)水平,并记录大鼠24 h存活情况。实验24 h后,麻醉处死大鼠并解剖,观察肠道损伤特点并行病理学检测。通过比较各组差异,研究高寒环境暴露后大鼠不同强度肠道冲击伤特点。
结果
2
较空白对照组,其余各组大鼠均出现不同程度肠道损伤,且低温+冲击伤组大鼠肠道更易出现水肿及损伤,低温+5.0 MPa冲击组存活率明显下降(
P
<
0.05)。病理学及血清学研究发现,低温+冲击组大鼠肠黏膜在高寒环境和冲击伤双重作用下,表现出肠黏膜出血、水肿、黏膜固有层崩解等;肠黏膜损伤指标及肠道炎症因子也较空白对照组明显升高,且随冲击强度增加,组间差异亦有统计学意义(
P
<
0.05)。
结论
2
低温暴露叠加腹部冲击波损伤后,大鼠死亡率明显增加,肠道损伤表现为血清学指标及肠道炎症因子升高,不同程度的肠壁水肿、黏膜下出血等,且损伤严重程度与冲击强度相关,随冲击强度增加而加重。
Objective To compare the intestinal injury induced by different intensities of waveshock in rats exposed to extremely cold environment and to preliminarily explore the characteristics of the injury. Methods Sixty healthy male SD rats (2 months old
weighing 200~250 g) were randomly divided into 6 groups(
n
=10): blank control group
low-temperature control group
5.0 MPa shock control group
and low-temperature+4.0
4.5 and 5.0 MPa shock groups. The rats in the experimental groups were pre-treated in a -10 ℃ low-temperature environment for 30 min and then subjected to intestinal injury by using BST-I biological shock tube with different driving pressures. At 3
8
and 24 h after injury
the serum levels of IL-6
TNF-α
intestinal fatty acid binding protein (I-FABP)
and diamine oxidase (DAO) were detected
and the survival of rats within 24 h was recorded. At 24 h after injury
the rats were anesthetized and dissected
the characteristics of intestinal injury were observed
and pathological examination was performed. The di
fferences of intestinal injury were compared among the 6 groups to explore the characteristics of intestinal injuries after different intensities of shockwave in rats after exposure to extremely cold environment. Results Compared with the blank control group
the other 5 groups exhibited different severities of intestinal injury
and the rats in the low-temperature+ different shock groups were more prone to intestinal edema and trauma. The mortality rate was significantly increased in the low-temperature+5.0 MPa shock group (
P
<
0.05). Pathological and serological studies found that dual effects of very cold environment and blast injury resulted in intestinal mucosal hemorrhage
edema
and disintegration of lamina propria in the experimental rats. The indicators of intestinal mucosal injury and intestinal inflammatory factors were also significantly increased when compared with the blank control group
and significant differences were among the groups with increment of shock intensity (
P
<
0.05). Conclusion Exposure to very cold environment combined with abdominal blast injury increases mortality rate in rats
manifested by elevated serological indicators and intestinal inflammatory factors
as well as varying severities of intestinal wall edema and submucosal bleeding. Furthermore
the severity of the injury is positively related to the impact intensity
with worsened as the impact intensity increasing.
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