Existence of rays with different decay rate between radiotherapy CT bed and radiotherapy bed, this paper discusses the rate induced and identified two kinds of simple solution.
Equipment Failure ; Radiotherapy ; instrumentation ; Tomography, X-Ray Computed ; instrumentation

Acupuncture Points ; Acupuncture Therapy ; instrumentation ; methods ; Humans ; Needles ; Pelvic Bones ; anatomy & histology

Aged ; Humans ; Leukemia, Myeloid, Acute ; diagnosis ; therapy

ObjectiveTo compare the effect of amiodaron and propafenone on the cardioversion of paroxysmal auricular fibrillation (PAF). Methods58 PAF (≤48 h) cases were radomly divide into two groups: 30 cases who accepted amiodaron 150 mg intravenous injection, and 0.6～1.0 mg/min intravenous drip afterwards in amiodaron group, other 28 cases who accepted propafenone 1.4～2.0 mg/kg vein injection, and 0.28 mg/min intravenous drip afterwards in propafenone group.If propafenone was not effective, the cases in propafenone group were given amidoaron. ResultsThe successful reversion rate was 86.7% (26/30) in amidoaron group while 57.1% (16/28) in propafenone group(P<0.05). The mean time of recovering was (101±95) min (6～508 min) in amidoaron group, while (172±148) min (11～608 min) in propafenone group(P<0.05). ConclusionIt is more rapid and effective of amidoaron on the cardioversion of paroxysmal auricular fibrillation than propafenone is.

Objective To assess characteristics of coronary artery lesions and risk factors of coronary heart disease (CHD) in young people with coronary arteriography.Methods 192 patients with CHD diagnosed by coronary arteriography were divided into the young group (91 cases, 25—40 years old) and senile group (101 cases, 41—84 years old). Characteristics of coronary artery lesions and risk factors of CHD of two groups were analyzed, and risk factors were especially tested with logistic regression.Results Coronary artery lesions in the young group were characterized in most patients by singles vessel lesion (64%), while by multi vessels lesion (71%) in the senile group. Multiple logistic regression analysis showed that risk factors such as male, smoking, hyperlipemia, family history and increassed C-reactive protein (CRP) were highly related with CHD(P<0.01).Conclusion Single vessel lesion is a feature of young patients with CHD, and independent and related risk factors of CHD in the young group are male, smoking, hyperlipemia, CHD family history and CRP.

Objective To evaluate the safety of myomectomy by extrusion in cesarean section , in comparison with routine cesarean delivery. Methods From January 2008 to December 2010, a total of 128 operations of myomectomy by extrusion in cesarean section were performed (Myoma Group), while another group of 128 cases undergoing caesarean section , which respectively followed every cases of the Myoma Group but had no hysteromyoma , was selected as the control group .The amount and rate of postpartum hemorrhage , the level of postpartum fever , and postoperative hospital stay between the two groups were compared , respectively. Results In the two groups:the amount of postpartum hemorrhage was (233.6 ±58.9) ml vs.(228.5 ±90.9) ml (t=0.530, P=0.597); the rate of postpartum hemorrhage was 0% (0/128) vs.0.8% (1/128) (P=1.000); the decrease of haemoglobin was (6.17 ±2.83) g/L vs.(6.89 ±3.09) g/L (t=-1.944, P=0.053); the decrease of hematocrit was 2.22%± 0.98%vs.2.27%±1.02% (t=-0.400, P=0.690); the rate of postpartum fever was 2.3% (3/128) vs.5.5% (7/128) (χ2 =1.665, P=0.197);the length of postoperative hospital stay was (4.2 ±0.8) d vs.(4.1 ±1.2) d (t=0.706, P=0.481). There were no significant differences between the two groups in the abovementioned parameters . Conclusions The myomectomy by extrusion in cesarean section does not increase the level of postpartum hemorrhage and the rate of postpartum infections .It is a simple, minimally invasive , safe and feasible surgical method , being worthy of clinical application .

Objective MRI was a powerful technique for evaluation of the meniscus injury.However,meniscal injuries were the most common reason for arthroscopy of the knee.The research was to reveal the relationship between the classification on MRI and the morphological changes of the meniscus injury under the arthroscopy in order to indicate the surgical procedures according to the MRI degree of meniscus in-juries.Methods From October2000to December2001,157knees of152cases with meniscus tears were analyzed retrospectively,who were classified into the osteoarthritis group and sport injury group depending on the causes of injury.There were107knees in osteoarthritis group,50knees in sport injury group.All cases were made MRI examination with T 1 and T 2 sequences,and152of them underwent arthroscopic oper-ation.According to the different signal intensity,changes of contour and edge of meniscus,juried meniscus were divided into four degrees,referring to the standard described by Stoller.The conditions of torn menis-cus were observe and recorded while performing arthroscopy in order to compare with that on MRI.Results The MRI classification in osteoarthritis group,there were gradeⅠin21knees,gradeⅡin34knees,gradeⅢin40knees,and gradeⅣin12knees;Depending on the exploration in arthroscopy,the accurate rate of diagnosis of MRI for meniscus injury was100%(21/21)for gradeⅠ,91.2%(31/34)for gradeⅡ,92.5%(37/40)for gradeⅢand100%(12/12)for gradeⅣ.The patients with gradeⅢand gradeⅣinjury of the meniscus all underwent the operation of arthroscopy.The MRI classification in sport injury group,there were gradeⅠin5knees,gradeⅡin4knees,gradeⅢin26knees,and gradeⅣin15knees.The accurate rate of diagnosis of MRI was75%(3/4)for gradeⅡ,92.3%(24/26)for gradeⅢand93.3%(14/15)for gradeⅣ.Conclusion In the meniscus tears,gradeⅠinjury on MRI is not indicated to surgical treatment,gradeⅡcan be explored in arthroscopy or observed when it is in need based on clinical symptoms.GradeⅢand gradeⅣof meniscus injury necessitate partial meniscectomy or meniscoplasty.

The paper analyzes the orientation of health management function of government under the perspective of new public service theory, tries to reveal the unimplementation, dislocation, offside and absence of government function at four aspects including health service system, health organization operating mechanism, health management system and health service supervision system, and puts forward six approaches for transformation of government function of health management.

[Objective]A new limited contact femoral supracondylar interlocking intramedullary nail(LCFSIIN) was made,which was part of a new custom-made hemi-knee joint,to improve the results of childrens' limb salvage.[Method]A new LCFSIIN was performed and the stress of bolts,intramedullary nails and bone were analyzed by finite dement analysis(FEA) while the bolts were implanted in different angulafions-0?,15?,30?,45?and 60?.[Result]The results of FEA show that the stress of bolts,bone and nails with 15? insertion angles of bolt was the tiniest and well distributed.Stress of bone with 0? insertion angles was more obvious than that with 15?,30?and 45?.The more the angles,the stress of proximal bolt became more obvious and the stress of distal bolt decreasing.[Conclusion]This new LCFSIIN can reduce destruction of biological environment of bone and is easy in use in limb salvage surgery of allograft.