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Based on the analysis of the deficiency of two previous Delaunay triangular mesh segmentation criterions—minimize difference of gray and minimize variance of gray, a new triangular mesh criterion, minimize sum of squared difference of gray, was proposed. The new segmentation was more rational and efficient so that the coding performance on it was improved obviously than before. Furthermore, a new hybrid coding scheme was also proposed under the criterion with transformation coding for intra frame and mesh-based motion estimation for inter frame, which could be applied in video sequence with complex motion and background. The restriction that mesh model based coding was only applicable in video conference applications was broken. Experimental result shows that the proposed scheme has a better performance than H.263 in applications with complex motion and background.

Objective: To observe the effect of early acupoint electrical stimulation on the decline of lower limbs muscle strength in patients with intensive care unit-acquired weakness (ICU-AW) caused by septic shock., Methods: A total of 58 patients with ICU-AW caused by septic shock were randomly divided into an observation group (28 cases, 1 case dropped off ) and a control group (30 cases, 2 cases dropped off ). Patients in both groups received routine basic treatment. In the observation group, acupoint electric stimulation therapy was added at Huantiao (GB 30), Futu (ST 32), Zusanli (ST 36), Xuanzhong (GB 39) and Taichong (LR 3). Unilateral point with electrodes were applied, the SDZ-Ⅱ electronic instrument (discontinuous wave, frequency in 2 Hz, strength in 5 mA) was connected and changed to the other side after 30 min of unilateral treatment.The treatment was given 2 times daily, continued for 7 d or until the medical research council (MRC) score being 54 points or more. The changes of lower limb muscle strength MRC score, modified Rankin scale (MRS) score, bilateral quadriceps thickness and gastrocnemius pinnate angle of both groups were observed before treatment and on discharge. The time of admission to ICU, time of hospitalization, mortality during hospitalization, and mortality 28 d after discharge were compared between the two groups. The MRS scores of the two groups were followed up 28 d after discharge., Results: The MRC scores of lower limb muscle strength in the two groups on discharge were higher than those before treatment ( P <0.05), and the MRS scores on discharge and 28 d after discharge in the two groups were lower than those before treatment ( P <0.05). The MRC scores of lower limb muscle strength on discharge in the observation group were higher than thoes in the control group ( P <0.05), and the MRS scores on discharge and 28 d after discharge in the observation group were lower than those in the control group ( P <0.05). On discharge, bilateral quadriceps thickness and gastrocnemius pinnate angle in the two groups were increased compared with those before treatment ( P <0.05), and thoese in the observation group was higher than the control group ( P <0.05). There was no significant difference between the two groups in the time of admission to ICU, time of hospitalization, mortality during hospitalization, and mortality 28 d after discharge ( P >0.05)., Conclusion: Early acupoint electrical stimulation can improve the lower extremity muscle decline in patients with ICU-AW caused by septic shock.

Objective: To compare the therapeutic effect of transcutaneous electrical acupoint stimulation (TEAS) combined with conventional western medicine and western medicine alone on early enteral nutrition tolerance in patients with sepsis., Methods: Forty-nine patients with sepsis were randomly divided into an observation group (24 cases) and a control group (25 cases). The control group was treated with conventional western medicine, including limited fluid resuscitation, anti-infection and maintenance of hemodynamics, and enteral nutrition was provided when the hemodynamics became stable and the dosage of vasoactive drugs was reduced. The observation group, on the basis of the treatment of the control group, was treated with TEAS at Tianshu (ST 25), Shangjuxu (ST 37), Jiexi (ST 41), Diji (SP 8), Zusanli (ST 36), Zhongwan (CV 12) and Daheng (SP 15) when the enteral nutrition was provided (dilatational wave, 2 Hz/10 Hz, twice a day, 30 min each time), and the TEAS stopped when enteral nutrition was normal. The antral motility index (MI) was evaluated by ultrasonography on the first, third and fifth day into treatment in the two groups, and the duration from providing enteral nutrition to normal enteral nutrition was recorded. The acute gastrointestinal injury (AGI) classification, admission time of intensive care unit (ICU) and hospitalization time were compared., Results: The antral MI on the third and fifth day into treatment in the observation group was significantly higher than that in the control group ( P <0.05). The duration from providing enteral nutrition to normal enteral nutrition was (5.08±0.65) days in the observation group, which was shorter than (5.56±0.65) days in the control group ( P <0.05). The improvement of AGI classification after treatment in the observation group was significantly superior to the control group ( P <0.05). The hospitalization time in the observation group was shorter than that in the control group ( P <0.05)., Conclusion: TEAS combined with conventional western medicine treatment could significantly promote gastrointestinal peristalsis, improve the early intestinal nutrition tolerance in patients with sepsis, so as to shorten the time of reaching the standard of enteral nutrition and hospitalization time, which is better than conventional western medicine treatment alone.

Objective: To observe the effect of ultrasound-guided acupoint electrical stimulation on the patients with diaphragmatic dysfunction associated with mechanical ventilation in ICU., Methods: Fifty-two patients were randomly divided into an observation group (26 cases, 3 cases dropping) and a control group (26 cases). Conventional treatment was given to all patients. On the basis of conventional treatment, acupoint electrical stimulation therapy was applied at Zhangmen (LR 3), Dabao (SP 21), Pishu (BL 20), Shenshu (BL 23), etc. In the observation group, the treatment was given for 30 min each time, 3 times a day for 7 days. Diaphragm thickening fraction (TFdi) was used as an index to guide the individualized setting of stimulation intensity and judge the effect, and the difference of mechanical ventilation time, ICU time, total hospitalization time, hospital mortality and reintubation rate between the two groups were observed., Results: The mechanical ventilation time in the observation group was shorter than that in the control group ( P <0.05). There was no significant difference in the ICU time and total hospitalization time between the two groups ( P >0.05). During hospitalization, 2 patients died in the observation group and 3 patients died in the control group, there was no significant difference in hospital mortality ( P >0.05). One patient in the observation group was reintubated and 8 patients in the control group ( P <0.05). The use of acupoint electrical stimulation was a factor in shortening the mechanical ventilation time and reducing the reintubation events ( P <0.05)., Conclusion: Ultrasound-guided acupoint electrical stimulation can relieve ventilator-induced diaphragmatic dysfunction, reduce ventilator support time and reintubation events.