Objective:To study the stability of dexmedetomidine combined with three opioid drugs ( sufentanil, fentanil and butor-phanol) in order to guide the reasonable clinical prescription. Methods:Dexmedetomidine was respectively combined with sufentanil, fentanil and butorphanol in 0. 9% sodium chloride injection. The mixture was stored at room temperature for 0, 24, 48 and 96h, and then withdrawn for the detection of appearance, pH value, insoluble particles, and the analysis of mass spectrometry was performed. Results:Within 96 h, the prepared solutions were clear and transparent with stable pH value and qualified insoluble particles, and the results of mass spectrometry showed no new substance was generated. Conclusion:The three combination schemes are safe, reasonable and feasible in clinical application.

Objective To investigate the clinical effect of Shenfu injection in the treatment of patients with post - cardiac arrest syndrome(PCAS),to analyze the patients' blood C - reactive protein (CRP) and early mean arterial pressure. Methods From September 2013 to September 2016,80 patients with PCAS in the No. 98 Hospital of PLA were randomly divided into study group and control group according to the digital table,with 40 cases in each group. The study group was treated by Shenfu injection,the control group was treated by saline. The changes of CRP,mean arterial pressure and GCS score at 4h,12h,1d,2d and 3d after resuscitation and the 90d survival rate were observed. Results At 4h,12h,1d,2d and 3d after resuscitation,the peripheral blood CRP levels in the study group were (22. 01 ±2. 16)mg/ L,(34. 68 ± 4. 95)mg/ L,(62. 51 ± 3. 68)mg/ L,(98. 65 ± 6. 57)mg/ L,(100. 67 ± 10. 03)mg/ L, respectively,which in the control group were (25. 16 ± 3. 54)mg/ L,(41. 52 ± 5. 31)mg/ L,(75. 09 ± 4. 58)mg/ L, (120. 48 ± 10. 61)mg/ L,(128. 26 ± 9. 64)mg/ L,respectively,there were statistically significant differences between the two groups(t = 4. 804,5. 959,13. 542,11. 063,12. 543,all P < 0. 01). At 4h,12h,1d,2d and 3d after resuscita-tion,the mean arterial pressure in the study group were (78. 03 ± 8. 65)mmHg,(88. 34 ± 10. 20)mmHg,(97. 05 ± 9. 57)mmHg,(105. 29 ± 10. 45)mmHg,(112. 14 ± 9. 46) mmHg,respectively,which were higher than those in the control group [(68. 21 ± 8. 03)mmHg,(74. 01 ± 10. 59) mmHg,(83. 09 ± 11. 25) mmHg,(98. 25 ± 9. 17) mmHg, (104. 68 ± 3. 14)mmHg](t = 5. 262,6. 164,5. 978,3. 203,4. 733,all P < 0. 01). At 4h,12h,1d,2d and 3d after resuscitation,the GCS scores of the study group were (5. 21 ± 1. 12) points, (5. 78 ± 2. 05) points, (6. 85 ± 1. 68)points,(7. 91 ± 2. 57)points,(9. 98 ± 2. 07) points,respectively,which were higher than those of the control group [(4. 01 ± 2. 14) points, (4. 22 ± 3. 75) points, (4. 39 ± 3. 89) points, (4. 41 ± 2. 86) points, (5. 06 ± 4. 14)points](t = 3. 142,2. 309,3. 672,5. 757,6. 723,all P < 0. 05). The survival rate of the study group was 50％(20 / 40) at 90d after resuscitation,which was higher than that of the control group [23％ (9 / 40)](χ2 = 6. 545,P =0. 011). Conclusion Shenfu injection has protective effect on the function of patients with CRP after surgery,and can improve the prognosis of patients,it is worthy of clinical use.