Objective To observe the effect of small doses of dexmedetomidine on postoperative analgesia and comfort after colorectal cancer radical operation in elderly patients .Methods 60 cases of elderly patients for elective colorectal cancer resection ,ASAⅠ~Ⅱgrade anesthesia were selected .According to randomly digital table , they were divided into the dexmedetomidine given group ( group D) and control group ( group C),30 cases in each group.The patients of group D was given to 0.5μg/kg dexmedetomidine for induction of anesthesia infusion , 15minutes bolus injection was completed ,intraoperative maintain 0.2μg· kg-1 · h-1 dexmedetomidine fixed to the front end of surgery 10 min.And group C was given to infusion of 0.9%sodium chloride injection in the same capacity . The operation time, amount of fentanyl using , comfort and VAS scores were recorded within 24h, maintain VAS score≤3 points.When VAS score>3 points,the pressing PCA was given ,and the number of times of pressing the PCIA was recorded.The adverse reactions occurred within 24h such as nausea and vomiting were also recorded . Results In the two groups,the results of postoperative analgesia were good ,but the VAS score of group D at each time of PCA point were less than those of group C (tend of surgery =5.99,tafter operation 2h =4.76,tafter operation 4h =4.08,all P<0.01).The Bruggrmann comfort score of group D were greater than those of group C (tend of surgery =9.86,tafter operation 2h =4.91,tafter operation 4h =6.84,all P<0.01).The incidence of adverse reactions of group D was 13.30%,which was less than 26.67%of group C(χ2 =4.32,P<0.05).Conclusion Small doses of dexmedetomidine given to improve the analgesic effect in elderly patients with colorectal cancer cure can improve comfort and reduce the incidence of adverse reactions ,and has a role in reducing postoperative nausea and vomiting .

Objective To evaluate the effect of preoperative sleep disturbance on efficacy of postoperative analgesia and comfort in patients undergoing colorectal cancer resection surgery.Methods 60 colorectal cancer patients with elective anesthesia laparoscopic radical resection were selected.According to the presence or absence of preoperative sleep disorders,they were divided into the sleep disorder group (group A) and non-sleep disorders group (group B),30 patients in each group.Two groups of patients used the same method to maintain anesthesia induction.Intraoperative intravenous nicardipine controlled hypotension in parallel to maintain MAP 60-75mmHg,HR 65-95times/min.The patients received PCIA pump at the end of surgery.Postoperative 24h VAS scores were maintained VAS score ≤3 points,when VAS score ＞ 3 points,given the pressing PCA analgesia remedy.The remedy situation within 24 hours after surgery and comfort analgesic score were recorded.Results Compared with group B,postoperative PCIA pressing number of group A significantly increased [A group:(11 ± 5),group B:(6 ± 5),t =2.44,P ＜ 0.05].At the end of surgery,postoperative 2h,4h,8h pain scores of group A were (2.8 ± 0.4),(2.5 ± 0.7),(3.2 ± 0.6),(3.5 ± 0.5),respectively,which were significantly higher than those of group B [(1.8 ± 0.5) points,(1.8 ± 0.4) points,(1.9 ± 0.3) points,(2.9 ± 0.3) points; at the end of surgery t =5.78,postoperative 2h t =4.56,postoperative 4h t =4.17,postoperative 8h t =2.09,all P ＜ 0.05],but postoperative 12h,24h had no significant change in pain scores (P ＞ 0.05).Compared with group B,the comfort scores of A group at the end of surgery,postoperative 2h,4h,8h,12h[group A:(2.8 ±0.3) points,(2.5 ±0.9)points,(2.6 ±0.9) points,(2.5 ±0.5) points,(2.9 ± 0.6) points ; group B:(3.8 ± 0.4) points,(3.3 ± 0.5) points,(3.6 ± 0.8) points,(3.3 ± 0.3) points,(3.3 ± 0.6) points] were significantly lower (at the end of surgery t =9.87 ; postoperative 2h t =4.94 ; postoperative 4h t =6.87 ; postoperative 8h t =7.61 ; postoperative 12h t--2.79,all P ＜ 0.05),after 24h comfort score had no significant change (P ＞ 0.05).Conclusion Preoperative sleep disorders can affect laparoscopic colorectal cancer after radical surgery analgesia and comfort of patients.

Objective To investigate the diagnostic value of B-mode ultrasonography in detecting middle hepatic vein(MHV)in chronic liver disease patients.Methods 80 chronic liver disease patients were divided into 2 groups(chronic hepatitis and liver cirrhosis).Liver biopsies and the inner diameter(ID)of MHV was detected with B-mode ultrasonography.The ID of MHV was compared in the chronic hepatitis and liver cirrhosis groups,different liver fibrosis stages and compensation/non-compensation liver cirrhosis.The ability of ID of MHV in auxiliary diagnosis liver cirrhosis was analyzed with the receiver operating characteristic curve(ROC).Results The size of ID of MHV in liver cirrhosis(3.82±1.84)mm was smaller than that of chronic hepatitis(6.15±1.67)mm(P＜0.01).The size of ID of MHV in non-compensation liver cirrhosis(2.98±1.15)mm was smaller than that of compensation liver cirrhosis(4.42±2 20)mm(P＜0.05).There was midrange negative correlation with liver fibrosis stages and the ID of MHV(rs=-0.465,P＜0.01).The cutoff point of ID of MHV diagnosis liver cirrhosis was 4.7mm.The area under ROC(AUC)achieved 0.813(P＜0.01).The sensitivity(Se),specificity,(Sp),positive predictive value (PPV),negative predictive value(NPV)and Youden index were 67.5%,90.0%,88.0%,73.5% and 57.5%,respectively.Conclusion There is well clinical value with B-mode ultrasonography detecting ID of MHV for the auxiliary diagnosis of chronic liver disease.

Objective To evaluate the effect of dexmedetomidine and tramadol on perioperative insulin resistance in patients undergoing radical resection of rectal carcinoma.Methods Sixty ASA I or II patients undergo-ing radical resection of rectal carcinoma were randomly divided into 3 groups(n =20 each):dexmedetomidine group (group D),tramadol group(group T),control group(group C).Group D was given dexmedetomidine intravenously at 1μg/kg 15min before induction of anesthesia followed by a continuous infusion of 0.5μg·kg -1 ·h -1 until the abdo-men was closed,and group T was given tramadol intravenously at 1.5mg/kg 15min before induction of anesthesia fol-lowed by a continuous infusion of 0.5mg·kg -1 ·h -1 until the abdomen was closed,whereas group C received the same volume of normal saline.Venous blood samples were taken at 30min before anesthesia induction(T1 ),1 h after the beginning of the operation(T2 ),1h after operation(T3 ),24h after operation(T4 )for determination of blood con-centrations of glucose(BG),insulin(INS),interleukin -6 (IL -6),tumor necrosis factor -α(TNF -α).Insulin resistance(HOMA -IR)and insulin sensitivity index(QUICKI)were calculated.The numbers of patients with PONV were studied respectively.Results The serum IL -6,TNF -α,BG,INS concentrations and HOMA -IR were signifi-cantly lower while ISI was significantly higher in both group D[t =7.71,3.37,8.78,8.73,11.45,2.82(T2 ),3.04, 2.95,12.75,10.73,16.09,2.92(T3 ),11.26,2.45,11.40,5.10,14.5,2.51(T4 ),all P <0.05]and group T[t =3.02,2.59,2.93,7.76,6.32,2.03(T2 ),8.78,2.27,4.14,8.83,7.68,2.12(T3 ),6.10,2.05,3.71,2.35,7.12, 2.09(T4 ),all P <0.05]at T2 ,T3 and T4 than those in group C.The serum TNF -αconcentration and HOMA -IR were significantly lower while ISI was significantly higher in group D[t =6.68,4.58,2.05 (T2 ),9.01,6.66,2.23 (T3 ),7.54,5.5,2.02(T4 ),all P <0.05]at T2 ,T3 and T4 than those in group T.The numbers of patients with PONV were significantly higher in group T than those in group D and group C (χ2 =26.13,18.75,all P <0.05 ). Conclusion Both dexmedetomidine and tramadol can attenuate perioperative insulin resistance in patients undergo-ing Radical Resection of Rectal Carcinoma,and the decrease the consentrations of IL -6 and TNF -αmay be involved in the mechanism.The roles of prevention of perioperative insulin resistance in dexmedetomidine group are superior to tramadol group.The incidence of PONV is less in a dexmedetomidine group than that in a tramadol group.

Objective To investigate the effects of dexmedetomidine combined with sevoflurane on elderly patients with postoperative recovery quality.Methods Selected 60 cases of abdominal rectal cancer resection for elderly patients,which were ASA I or II,were randomly divided into two groups by a random number table method, while each groupincluded 30 cases:the control group( group N) and the dexmedetomidine group( group D) .Before the induction of anesthesia,group D vein was injected with micro pump ( more than 10 min) of dexmedetomidine 1μg/kg ( which was formulated with physiological saline as 4μg/mL) ,and then was given to maintain the dexmedetomidine 0.5μg/h and N group was injected with micro pump of the same volume of normal saline.The two groups of anesthesia were same,by which the static inhalation of composite general anesthesia.Observation were recorded before induction of anesthesia(T0),given dexmedetomidine(TI),after intubation 1 min(T1),5 min(T2),drawing tube immediately (T3),extubation after 5min(T4),30min(T5)the time of HR,BP,SpO2,BIS;propofol and remifentanil dosage,opera-tive time,operation time,a nesthesia time,recovery time,drawing tube time,extubation after Ramsay Sedation score, pain score,patient satisfaction and adverse reactions were recorded.Results In T3 period,the changes of HR (82 ± 14)times/min,SBP (130 ±8)mmHg,DBP (85 ±13)mmHg in group N were more obvious than (70 ±12)timse/min, SBP (121 ±7)mmHg,DBP (79 ±9)mmHg in group D,the difference between the two groups had statistical signifi-cance(t=6.28,4.63,2.08,all P<0.05).In T5 period,the levels of blood glucose (5.3 ±1.1)mmol/L and cortisol (402 ±78) nmol/L and ( 0.260 ±0.044 ) ng/L in group D were significantly lower than ( 5.9 ±1.2 ) mmol/L, (550 ±92)nmol/L,IL-6 (0.300 ±0.066)ng/L in group N(t=2.02,6.72,2.76,all P<0.05).However,the composite of dexmedetomidine group D patients with respiratory recovery time(7.5 ±2.3)min,calling the eyes open time(7.8 ±2.5) min,pull out the time of endotracheal tube (14.2 ±3.3) min compared with groups N of patients with respiratory recovery time (7.8 ±2.5)min,calling the eyes (14.8 ±3.2)min,pull out the time of endotracheal tube (13.9 ±3.1)min,showed no statistical significance (t=0.88,0.44,0.36,all P>0.05).In group N,postoper-ative restlessness in 8 cases,nausea and vomiting in 10 cases,chills in 9 cases,which were significantly higher than 2 cases,2 cases,2 cases in group D(χ2 =4.32,6.67,5.45,all P<0.05).At the same time,the satisfaction score of patient in group D (3.0 ±0.3)point,which was significant higher than (2.7 ±0.5)points in group N (t=1.88,P<0.05).Conclusion Dexmedetomidine detomidine composite sevoflurane anesthesia can improve the postoperative re-covery quality of elderly patients with rectal cancer radical surgery.