RÉSUMÉ
Objective To investigate the main risk factors of respiratory complications in patients with cervical spinal cord injury so as to provide reference for early nursing assessment and personalized nursing intervention model. Methods A retrospective case series study was conducted on the clinical data of 303 patients with cervical spinal cord injury admitted to the Third Hospital of Hebei Medical University between January 2015 and September 2016. There were 248 males and 55 females, aged (44.9 ±13.8)years (range, 14-70 years). There were 109 cases at fracture site C14 and 194 cases at C5-8. According to ASIA classification, 131 cases were grade A, 26 cases grade B, 42 cases grade C, and 104 cases grade D. The duration from injury to operation was (23.2 ± 69.9) hours (range, 6-48 hours). Univariate analysis was performed on the risk factors of respiratory complications, including gender, age (14-54, 55-65, and 66-70 years old), occupation, hospital stay, smoking history, previous history, ASIA grade (grades A to D), injury cause, complications (abdominal distension, hyponatremia, hypoproteinemia, and anemia). Multivariate logistic regression was used to analyze the significant risk factors in the univariate analysis so as to further identify risk factors associated with respiratory complications. Results Univariate analysis showed that age (55-65 and 66-70 years), ASIA grade A, ASIA grade B, smoking history, injury cause, complications (abdominal distension, hyponatremia, hypoproteinemia, and anaemia) were related to respiratory complication of patients with cervical spinal cord injury (P ＜0.05). The gender, occupation, length of hospital stay, and previous history were not associated with respiratory complications of patients with cervical spinal cord injury (P＞0.05). Logistic regression analysis showed that age between 55 and 65 years (OR = 3.989, P ＜ 0.05), age between 66 and 70 years(OR =0.301, P＜0.05), AISA grade A (OR=30.300, P＜0.05), ASIA grade B (OR =5.784, P ＜0.05), smoking history (OR=5.238, P ＜0.05), abdominal distension (OR = 1.975, P＜0.05), hypoproteinemia (OR =6.212, P ＜ 0.05), and hyponatremia (OR =3.233 ＜0.05) were independent risk factors for respiratory complications in patients with spinal cord injury. Except for ASIA classification, other factors might be easily ignored by doctors and nurses, leading to poor prognosis of patients. Conclusions Age (above 55 years), ASIA grades A and B, smoking history, abdominal distention, hypoproteinemia, and hyponatremia are the risk factors of respiratory complications in patients with cervical spinal cord injury. Based on the results, early nursing assessment can be carried out and personalized nursing measures can be taken to reduce the incidence of respiratory complications. It can also provide reference for constructing standardized nursing intervention model.
RÉSUMÉ
Objective: To study long time aerobic training effect on mitochondrial DNA (mtDNA) content and activities of mitochondrial respiratory chain complexes in the myocardium and brain tissues of aged rats. Method: Forty-five rats were randomly divided into three groups Group A(n=15)younger rats did not received training; Group B (n=15) old rats did not received training; Group C (n=15) old rats received gradually training for 90 days. The mtDNA content were determined by methods of Yah erc, the activity of mitochondrial respiratory chain complexes in myocardium and brain tissues were determined by methods of Wu etc. Result: The mitochondrial DNA content in myocardium and brain tissues significantly increased (P<0.01) and the activity of mitochondrial respiratory chain complexes in myocardium and brain tissues significantly decreased (P<0.05-0.01) in the aging control group as compared with those in the young group. The mitochondrial DNA content in myocardium significantly decreased (P< 0.05), while there was no significant difference in brain. The activity of mitochondrial respiratory chain complexes in myocardium and brain tissues significantly incroased(P<0.05-0.01) in the aging training group as compared with those in the aging control group. Conclusion: the long time aerobic training could decline the mitochondrial DNA content and increase the activity of mitochondrial respiratory chain complexes in myocardium and brain tissues in aging rats.