OBJECTIVE To study the clinical features of acute leukemia(AL) patients with complication of infection. METHODS A retrospective analysis of prevalence of infection occurring in 123 AL patients,their bacterial spectrum,and the effect of G-CSF on the infection were done. RESULTS The prevalence of infection in AL patients was 94.3%,among which 49.2% were infected with Gram-positive organisms,42.4% with Gram-negative bacilli and 8.4% with fungi.Blood culture occurred mostly with Escherichia coli and Pseudomonas infection.Patient′s neutropenia was significantly related to the infection.The patients with neutrophil count less than 0.2?10~9/L had more frequently suffered severe infection with long-lasting time,and had more than two sites of infection.Age,hemoglobin level,prophylactic intestinal usage of antibiotics could not reduce patient′s infection.The total mortality of AL patients with infection was 6%.Pulmonary infection and septicemia increased mortality,but G-CSF therapy reduced it. CONCLUSIONS AL patients are at high risk of infection which is significantly associated with severe neutropenia.G-CSF therapy exerts an assistant role to antibiotics in controlling the infection.

Objective To design a controller for the air environment of cabins of special vehicles .Methods The microprocessor was used to collect and store parameters ,and calculate automatically the operative mode of actuators ,such as the fan,air-conditioner,oxygenerator,air cleaner, filtering and boosting devices according to the preset target values .Output commands by RS485 were used to control actuators .Results and Conclusion The controller is capable of control integration for air-adjusting equipment while improving the control effect of the air quality in cabins of special vehicles .

Objective To observe the seroreversion of serological tests for syphilis in neonates born to mothers with syphilis and to evaluate the influence of antisyphilitic treatment on the time of seroreversion in uninfected neonates.Methods A total of 115 neonates born to mothers with syphilis were recruited in this study,and underwent toluidine red unheated serum test (TRUST),Treponema pallidum particle assay (TPPA)and 19S IgM-TPPA at birth.Follow up was scheduled at 1,3,6,9,12,18 and 24 months of age,and cancelled as soon as both TRUST and TPPA became negative during the 24 months.Both TRUST and TPPA were carried out at each follow-up visit.Kaplan-Meiter survival analysis and Wilcoxon rank-sum test were conducted to assess these data by using SPSS 13.0 software.Results At birth,TPPA was positive in all (100％) of the neonates,TRUST in 97 neonates (84.3％) with the titer ranging from 1 ∶ 1 to 1 ∶ 256,19S IgM-TPPA in 3 neonates who were diagnosed with congenital syphilis (CS).CS was ruled out in the other 112 neonates with negative 19S IgM-TPPA after follow up.Of the 3 neonates with CS,all became negative for TRUST within 12-18 months after birth,2 remained positive for TPPA at 24 months of age,1 remained positive for TPPA at 20 months of age,and all were still followed at the time of this writing.The cumulative seroreversion rate was 82.2％,98.9％ and 100％for TRUST at 0-3,4-6 and 7-9 months of age,respectively in 90 uninfected neonates,3.1％,30.2％,85.4％ and 100％ for TPPA at 0-3,4-6,7-9 and 10-12 months of age,respectively in 96 uninfected neonates.Of 16 neonates who missed some follow-up visits,all turned negative for TRUST and TPPA within 15 months after birth.As far as the TP-seropositive uninfected neonates were concerned,no statistical differences were observed in the seroreversion time of TRUST or TPPA between neonates receiving antisyphilitic treatment and those without antisyphilitic treatment (x2 =0.54,2.41,respectively,both P ＞ 0.05).The seroreversion of TRUST occurred earlier than that of TPPA (Z =10.45,P ＜ 0.01).Conclusions Most uninfected neonates born to syphilitic mothers turn negative for TRUST within 6 months after birth,and for TPPA within 12 months.And the seroreversion of TRUST usually occurs earlier than that of TPPA.Antisyphilitic treatment shows no significant influence on the seroreversion time of TRUST or TPPA in these seropositive uninfected infants.

It is an important teaching task how to make respiratory disease specialists to accept the standardization training of pulmonary function. However, the theory of pulmonary function is comparatively abstract and the training time is short, but the task is heavy. In order to explore a set of feasible training mode, the pulmonary function laboratory of Zhongshan Hospital affiliated to Fudan University carries out various forms of training, such as compiling textbooks, establishing case database, using multimedia teach-ing, arranging one-to-one guided teaching, and training the ability of doctor-patient communication.

Objective To investigate the treatment effect of proximal femoral nail antirotation (PFNA) on unstable femoral intertrochanterie fractures in the elderly. Methods A retrospective stud- y was done on 65 patients with unstable femoral intertrochanteric fractures, who were treated with PFNA from December 2005 to October 2006 and followed up for at least half a year. There were 22 males and 43 females, at age range of 67-97 (mean 78.5 years). All the operations were carried out within a week af- ter fractures. The data of operation time, operative blood loss, complications, bone healing time and hip function scores were recorded for evaluating treatment outcomes. Results All the patients were fol- lowed up for 6-18 months (average 10.5 months). The operation lasted for (29.6±7.5) minutes, with mean blood loss of (150.5±40.2) ml and bone healing time of (9.1±2.2) weeks. All patients ob- tained satisfactory treatment results, except for 3 patients with proximal thigh pain, 2 with pulmonary in- fection occurred and 1 with thrombs of lower limb vein. Harris post trauma hip function score was (88.5 ± 6.3) points. Conclusion PFNA is an effective way for femoral unstable intertrochanteric fractures in the elderly, for it is characterized by short operation time, less blood loss and stable fixation.

Objective To investigate the polymorphisms of human cytomegalovirus ( HCMV ) UL146 gene in asymptomatic children. Methods Urine samples were collected from 47 asymptomatic chil-dren who were positive for HCMV DNA. PCR was performed to amplify the open reading frame ( ORF) of UL146 gene. Positive bands were sequenced and variations in UL146 gene were analyzed by using bioinfor-matics software. Results Seventeen samples were successfully amplified and sequenced. Variations spread all over the sequence of UL146 gene and the variability in nucleotide and amino acid sequences ranged from 0％ to 42. 5％ and 0％ to 67. 7％ respectively. Compared with the Towne strain, there was diversity in sig-nal sequence and C-terminal region. Phylogenetic analysis indicated that UL146 in the 17 asymptomatic chil-dren belonged to four genotypes, which were G1, G8, G9 and G11. Forms of post-translational modification varied greatly among the four genotypes, while the important functional region of ELRCXC chemokine was highly conservative. Secondary structure prediction showed that random-coli conformation was the predomi-nant structure of active proteins. Isoelectric point ( PI) and molecular weight ( MW) were dissimilar among the four genotypes. Conclusion HCMV UL146 gene in asymptomatic children was hypervariable in both nucleotide sequence and amino acid structure. However, the important functional region was highly con-served. The predominant genotypes of UL146 in these children were G1, G8, G9 and G11, and the geno-type distribution in them showed no significant difference with previous findings in children with symptomatic HCMV infection.

OBJECTIVETo study the effect of length of cervical anterior fusion on adjacent levels by Biomechanical test.

METHODSSix fresh-frozen human cervical specimens were used in this study. The specimens were tested in flexion, extension, bending and rotation on a spine 3D test system. The specimens were tested intact and then underwent a single-level anterior cervical discectomy and fusion (ACDF) at the C4-5 first, a double-level fusion at the C4-6, and finally extended to triple-level at the C4-7, Based on a hybrid test method. Changes in overall range of motion (ROM), segmental motion and facet joints pressure during flexion, extension, bending and rotation were measured and statistically analyzed.

RESULTSThe overall ROM of the entire spinal construct decreased progressively as the single-level fixation extending to 2-level and 3-level (P < 0.05). A progressive increase in ROM above (C3-4) the fused motion segment units (MSUs) was found during flexion, extension and bending (P < 0.05). In bending and extension, a same result was recorded on the average pressure and max pressure of C3-4 facet joints (P < 0.05).

CONCLUSIONSThis study has demonstrated that the biomechanics at adjacent levels to a cervical spine fusion are altered and that there was progressively increased adjacent segment motion and stress as a single-level ACDF extended to a 3-level fusion, which might lead to the acceleration of adjacent segment degeneration.

Biomechanical Phenomena ; Cadaver ; Cervical Vertebrae ; surgery ; Diskectomy ; methods ; Humans ; Range of Motion, Articular ; Rotation ; Spinal Fusion ; methods

This paper introduces the failure phenomenon, failure analysis, maintenance process and method of SIEMENS PRIMUS linear accelerator.
Particle Accelerators ; Radiotherapy Dosage

Objective To evaluate the feasibility and clinical efficacy of preoperative simultaneous integrated boost intensity-modulated radiotherapy (SIB-IMRT) combined with neoadjuvant chemotherapy of capecitabine in patients with locally-advanced low rectal cancer.Methods Between 2015 and 2016,26 patients admitted to 301 Hospital who were diagnosed with locally-advanced low rectal cancer,which was located within 5 cm from the anal verge,were enrolled in this investigation.Dose fractionation pattern was delivered:58.75 Gy in 25 fractions (2.35 Gy/fraction) for rectal cancer and lymph node metastasis and 50 Gy in 25 fractions for the pelvic lymphatic drainage area and simultaneously combined with capecitabine chemotherapy (825 mg/m2,bid d 1-5 weekly).One cycle of capecitabine (1 250 mg/m2,twice daily,d 1-14)was given at one week after the completion of chemoradiotherapy (CRT).Total mesorectal excision (TME)was performed at 6 to 8 weeks after the completion of CRT.The primary endpoints included pathological complete response rate (ypCR) and sphincter-preserving rate.The secondary endpoints included acute toxicity,tumor downstaging rate and postoperative complications.Results Twenty-six patients successfully completed neoadjuvant CRT,25 of them underwent surgical resection and one patient failed to receive surgery due to pxrianal edema.Postoperative ypCR rate was 32％ (8/25),the sphincter-preserving rate was 60％ (15/25),the tumor downstaging rate was 92％ (23/25) and the R0 resection rate was 100％.During the period of CRT,grade 1 and 2 adverse events occurred in 24 patients,grade 3 radiation dermatitis was noted in 2 cases.No ≥ grade 4 acute adverse event was observed.Postoperative complications included ureteral injury in one case and intestinal obstruction in one patient.Conclusions Preoperative SIB-IMRT combined with neoadjuvant chemotherapy of capecitabine is a feasible and safe treatment for patients with locallyadvanced low rectal cancer,which yields expected ypCR rate,R0 resection rate and sphincter-preserving rate.Nevertheless,the long-term clinical benefits remain to be elucidated.Clinical Trial Registry Chinese Clinical Trial Registry,registration number:ChiCTR-ONC-12002387.

Objective:To evaluate the efficacy of preoperative neoadjuvant chemoradiotherapy for low and locally advanced rectal cancer.Methods:Clinical data of 46 patients with low rectal tumors located within 6 cm from the edge of anal admitted to our hospital between February 2014 and December 2018 were retrospectively analyzed. SIB-IMRT technique was adopted for preoperative radiotherapy. Rectal tumors and positive lymph nodes were irradiated with a dose of 58.75 Gy in 25 fractions (2.35 Gy/fraction), and pelvic lymphatic drainage area was given with 50 Gy in 25 fractions (2.0 Gy/fraction). Oral administration of capecitabine was delivered for concurrent chemotherapy. Radical surgery for rectal cancer was performed at 6 to 12 weeks after the end of chemoradiotherapy. The overall survival (OS), disease-free survival (DFS), progression-free survival (PFS), local recurrence-free survival (LRFS) and metastasis-free survival (MFS) were calculated by using Kaplan- Meier method. Univariate analysis was conducted by log-rank test, and multivariate analysis was performed by Cox’s regression model. Results:After a median follow-up of 47 months, local recurrence occurred in 3 patients and distant metastasis in 6 patients. The ypCR rate was 26%(12/46), the sphincter-preservation rate was 74%(34/46), the R 0 resection rate was 100%(44/44), the overall tumor response TN down staging rate was 87%(40/46), and the postoperative complication rate was 13%(6/46). The 3-year OS, DFS, and PFS were 93%, 91% and 87%, respectively. In univariate analysis, ypN staging was an important factor affecting OS, DFS, PFS, LRFS and MFS (all P<0.05). In multivariate analysis, ypN staging was significantly correlated with DFS, PFS, LRFS and MFS (all P<0.05). Conclusions:Preoperative SIB-IMRT 58.75 Gy in 25 fractions combined with capecitabine chemotherapy is a safe and efficacious treatment for patients with low and locally advanced rectal cancer, which improves the ypCR rate and quality of life, and yields tolerable adverse reactions. Nevertheless, the long-term survival benefits remain to be validated.