Objective To evaluate the feasibility and accuracy of virtual preoperative planning and 3D-printed templates for pre-contoured plates for the treatment of posterior wall fractures of the acetabulum.Methods A retrospective analysis of 29 patients with posterior acetabular wall fractures treated between August 2017 and March 2021 were divided into 2 groups based on whether to use preoperative virtual planning and 3D printed template.In 3D-printing group,there were 14 patients,includ-ing 10 males and 4 females;aged from 21 to 53 years old;CT-based virtual surgical planning was done using Mimics and 3-Matic software and 3D-printed templates for pre-contoured plates were adopted.In conventional group,there were 15 patients,including 10 males and 5 females;aged from 19 to 55 years old;conventional method of intra-operative contouring to adapt the plate to the fracture region was adopted.Blood loss,surgical time,radiographic quality of reduction,and hip function were compared between groups.Results The difference in operation time and intraoperative blood loss was significant(P＜0.05).Twenty-three patients were followed up from 12 to 30 months,and the fractures in both groups healed with a healing time of 3 to 6 months.At the last follow-up,the Merle d'Aubign-Postel score of the 3D printed group was lower than that of the conven-tional group(P＜0.05),with no significant differences in walking ability,hip mobility and total score(P＞0.05).In 3D printing group,6 cases were excellent,5 cases were good,3 cases were fair;in conventional group,5 cases were excellent,5 cases were good,4 cases were fair,1 case was worse;no significant difference between two groups(P＞0.05).Conclusion Virtual preopera-tive planning and 3D-printed templates for pre-contoured plates can reduce operative time and the blood loss of surgery,im-prove the quality of reduction.This method is efficient,accurate and reliable to treat acetabular posterior wall fractures.

OBJECTIVE: To investigate the short-term clinical effect of the computer virtual technique combined with pelvic reduction frame in the treatment of complex pelvic fractures. METHODS: Thirty patients with Tile C pelvic fractures treated by percutaneous minimally invasive pelvic reduction frame from April 2018 to April 2020 were retrospectively analyzed, including 21 males and 9 females, aged from 19 to 57 (39.40±9.85) years old. The patient's pelvic CT DICOM data were imported into Mimics software to reconstruct the virtual fracture model. Virtual reduction and nail placement were carried out on the fracture model, and then simulated fluoroscopy was carried out to record the ideal fluoroscopy orientation and angle to guide the correct fluoroscopy during operation. The operation time, fluoroscopy times and intraoperative blood loss were recorded. The quality of fracture reduction was evaluated by Matta image score standard, and the postoperative function was evaluated by Majeed function score standard. RESULTS: All 30 patients achieved closed reduction and percutaneous screw fixation. According to Matta score, the excellent and good rate of fracture reduction was 93.3%(28/30). A total of 67 channel screws were inserted, and the excellent and good rate was 98.5%(66/67). The operation time was (173.54±79.31) min, fluoroscopy time was (90.81±41.11) times, intraoperative blood loss was (81.21±43.97) ml. All incisions healed at one stage without broken nails or re-displacement of fractures. All patients were followed up for 12 months. At the final follow-up, Majeed function score was 73 to 94(85.66±5.33) scores. CONCLUSION Computer virtual technology combined with pelvic reduction frame could rapidly, accurately and safely reduce and fix unstable pelvic fractures. Computer virtualization could help surgeons to recognition and understanding pelvic fractures, pelvic reduction frame could improve the surgeon's ability to manage complex and unstable pelvic injuries.
Adult ; Blood Loss, Surgical ; Computers ; Female ; Fracture Fixation, Internal/methods* ; Fractures, Bone/surgery* ; Humans ; Male ; Middle Aged ; Pelvic Bones/injuries* ; Retrospective Studies

OBJECTIVES: To investigate the incidence of extrauterine growth retardation (EUGR) and its risk factors in very preterm infants (VPIs) during hospitalization in China. METHODS: A prospective multicenter study was performed on the medical data of 2 514 VPIs who were hospitalized in the department of neonatology in 28 hospitals from 7 areas of China between September 2019 and December 2020. According to the presence or absence of EUGR based on the evaluation of body weight at the corrected gestational age of 36 weeks or at discharge, the VPIs were classified to two groups: EUGR group (n=1 189) and non-EUGR (n=1 325). The clinical features were compared between the two groups, and the incidence of EUGR and risk factors for EUGR were examined. RESULTS: The incidence of EUGR was 47.30% (1 189/2 514) evaluated by weight. The multivariate logistic regression analysis showed that higher weight growth velocity after regaining birth weight and higher cumulative calorie intake during the first week of hospitalization were protective factors against EUGR (P<0.05), while small-for-gestational-age birth, prolonged time to the initiation of total enteral feeding, prolonged cumulative fasting time, lower breast milk intake before starting human milk fortifiers, prolonged time to the initiation of full fortified feeding, and moderate-to-severe bronchopulmonary dysplasia were risk factors for EUGR (P<0.05). CONCLUSIONS It is crucial to reduce the incidence of EUGR by achieving total enteral feeding as early as possible, strengthening breastfeeding, increasing calorie intake in the first week after birth, improving the velocity of weight gain, and preventing moderate-severe bronchopulmonary dysplasia in VPIs.
Female ; Fetal Growth Retardation ; Gestational Age ; Hospitalization ; Humans ; Incidence ; Infant ; Infant, Newborn ; Infant, Premature ; Infant, Very Low Birth Weight ; Prospective Studies ; Risk Factors

Aortic Valve/surgery* ; Aortic Valve Stenosis/surgery* ; China/epidemiology* ; Heart Valve Prosthesis Implantation ; Humans ; Severity of Illness Index ; Treatment Outcome

Objective To learn the status of wild freshwater fish and shrimp infected with metacercaria of clonorchis sinensis in Jinhua city.Methods Wild freshwater fish and shrimp were randomly captured in river channel,reservoir and pond from 3 counties according to the distribution characteristics of main river system in Jinhua city.Direct tabletting microscopic examination was used to detect metacercaria of clonorchis sinensis in the muscle of wild freshwater fish and shrimp.Results A total of 1 1 kinds of wild freshwater fish and shrimp were infected with metacercariae,accounting for 61 .1 1 %(1 1 /1 8),and the total infection rate was 5.63% among 2 326 wild freshwater fish and shrimp.The infection rate of fish(8.24%)was significantly higher than that of the shrimp(2.96%)(P <0.01 ).There were significant differences in the infection rate among different counties (P <0.01 ),and the infection rate in the downstream of the water system in Wu water area (1 2.90%)was the highest.Also,significant differences were observed in infection rate among different water environments (P <0.01 ),and the infection rate of pond (1 0.1 8%)was the highest.Significant differences were observed in the infection rate among different kinds of wild freshwater fish (P =0.00),and the infection rate of side skin fish(1 7.65%)and psendorasbora parve(1 7.65%)were the highest.Conclusion There were metacercaria of clonorchis sinensis infection in wild freshwater fish and shrimp with different degrees in Jinhua city.People who ate raw or undercooked freshwater fish and shrimp may be at the risk of infection.

BACKGROUNDThe Red Cross of China and Ministry of Health jointly started a pilot program of organ donation after cardiac death to overcome the shortage of available organs since 2010. The purpose of this qualitative study were to compare the consent rate of organ donation between young donor families and adult donor families; to explore and determine factors associated with differences in willingness to donate organs between them. Research objective was to provide a rationale for further preparation of professionals involved in this sensitive work.

METHODSBetween March 2010 and June 2012, 24 young deceased patients including donors and non-donors and 96 potential adult donors were collected, and consent rates of young donors' families and adult donors' families were calculated. A χ(2) test analysis to compare the consent rates of the two groups was conducted. We studied through semistructured interviews 15 parents of young donors and 15 relatives of old donors who were interviewed for petition of consent. Data collection and analysis of the overall study were performed according to the grounded theory methodology. Factors that influenced the families' decisions were identified and classified. We found the differences in willingness to donate organs between the two groups.

RESULTSThe consent rate of young donor families was 66.67%, while the consent rate of adult donor families was 26.04%. Young donor families easily consented to organ donation than adult donor families (P < 0.005). The donors' families had been affected by various factors throughout the process of deciding to give consent for donation. The findings led to the formulation of an empirically based model of interlinking categories that influence families' decision-making process in organ donation. These factors are grouped into five main categories: (1) personal factors, (2) conditions of organ request, (3) interpersonal factors, (4) ethical factors, and (5) traditional views. The funeral tradition influenced the young donor parents' consent to donation, but had no relation with family decision of adult donors. And the family members of young donors are relatively less, who are more likely to reach a consensus.

CONCLUSIONSYoung donor families influenced by traditional funeral beliefs are easier to consent to organ donation than adult donor families. Family members of young donors are relatively less who are more likely to reach a consensus. Acceptance of the expanded criteria donors may improve the organ donation rates, especially those of the advanced age.

Adolescent ; Adult ; Age Factors ; Aged ; Cadaver ; China ; Family ; psychology ; Humans ; Middle Aged ; Tissue and Organ Procurement

Antiviral Agents ; adverse effects ; therapeutic use ; Female ; Hepatitis C, Chronic ; complications ; drug therapy ; psychology ; Humans ; Interferon-alpha ; adverse effects ; therapeutic use ; Mental Disorders ; complications ; Middle Aged

Aged ; Female ; Humans ; Lymphoma, Large B-Cell, Diffuse ; pathology ; Urinary Bladder ; pathology

RHD gene has different alternative transcripts. This study was aimed to construct expression vector of normal mRNA, DEL9 and DEL89 transcripts from RHD gene. Total RNA was extracted from Rh(D) positive umbilical blood cells of newborn. Intact RhD cDNA, DEL9 and DEL89 transcripts were obtained by one-step and two-step RT-PCR, respectively. The obtained products were cloned into pCR4 TOPO sequencing vector for choosing the right transcript. RHD gene was amplified again from the sequencing plasmid DNA, and then subcloned into pcDNA3.1/V5-His TOPO expression vector; DEL9 and DEL89 were cloned into the expression vector directly. Gene sequence and direction were identified by sequencing. The results showed that the sequence and direction of target genes were right, thus these 3 different expression vectors were correctly constructed. It is concluded that expression vector is constructed from different transcripts of RHD gene, which lays a foundation for further exploring the membranous protein expression of Rh(D) antigen.
Cloning, Molecular ; Gene Expression ; Genetic Vectors ; Humans ; Molecular Sequence Data ; RNA, Messenger ; genetics ; Rh-Hr Blood-Group System ; genetics ; Sequence Analysis, DNA