OBJECTIVETo study the therapeutic effects of posterolateral depression fractures of the tibial plateau through a modified anterolateral approach.

METHODSFrom February 2011 to January 2012,13 patients with posterolateral depression fractures of the tibial plateau were treated through a modified anterolateral approach. There were 8 males and 5 females, ranging in age from 28 to 59 years old (49.2 years old on average). Data from patients were collected retrospectively as follows: X-ray, time of fracture healing and the complications of fracture healing. The patients were evaluated both clinically and radiologically according to the Rasmussen score system.

RESULTSAll the patients were followed up, and the duration ranged from 6 to 18 months (mean 13.7 months). All the patients got bony union. The average radiographic bony union time was 15.1 weeks (ranged, 11 to 17 weeks). No case of secondary articular depression was found. No complications such as malunion or joint stiffness were found. But 1 patient had superficial infection and 1 patient had common peroneal nerve injury. According to the Rasmussen score system,the mean radiological score was 16.50 ± 0.67 (ranged, 13 to 18), and the mean functional score was 25.20 ± 2.21 (ranged, 13 to 30). The mean range of knee motion was (125.3 ± 9.3)° (ranged, 0° to 135°).

CONCLUSIONTreatment of depression fractures of posterolateral tibial plateau with a modified anterolateral approach is a safe method with effective exposure, due to its stable fixation and relatively good outcome with minimal soft-tissue complications. It is regarded as an ideal procedure for depression fractures of posterolateral tibial plateau.

Adult ; Female ; Fracture Fixation, Internal ; methods ; Fracture Healing ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Tibial Fractures ; surgery

Objective To survey the highly risk iodine deficiency regions of Shandong Province and to provide reference basis for further executing urgent iodine supply. Methods The annual document of cretinism in Licheng District in Jinan City and Shouguang City, the two iodine deficiency regions, were referred. Forty children aged 8-10 years of 2 targeted schools from 3 towns out of every targeted region underwent palpation, ultrasonography and As3+-Ce4+catalyzing speetrophotometry for ultra iodine examination. Twenty women aged 18-40 years from 2 villages sampled from every targeted town received ultra iodine examination and edible salt examination of iodine with direct titration. Results No new cretinism and suspected cretinism was found since 1995 in the regions. The goiter rates of children of the two regions detected with palpation and ultrasonography were 7.5% (18/241),6.2% (15/241) and 5.0% (13/259), 1.2% (3/259), respectively. Two hundred forty and 249 urine samples were respectively collected in school children, in which the median urinary iodine was 226.3,282.7 μg/L. One hundred twenty urine samples were respectively collected from the two group of women, resulting a median urinary iodine of 187.2,321.7 μg/L. Eight and 2 salt samples were free of iodine in 120 salt samples collected each region, respectively. The rate of qualified iodized salt was 100%. Conclusions It is not necessary to urgently implement iodine supply in Shouguang City and Licheng District. However, reinforcement of supervise on salt industry and eliminating the hazard from non-iodized and disqualified iodized salt remains in need.

OBJECTIVETo investigate the protective effect of lycopene against cryopreservation injury of post-thawing human sperm and its mechanism.

METHODSSemen samples were collected from 25 volunteers, each sample equally divided into four parts to be cryopreserved with cryoprotectant only (Ly0 control) or cryoprotectant + lycopene at the concentrations of 2 (Ly2), 5 (Ly5), and 10 µmol/L (Ly10), respectively. Before and after thawing, the semen samples were subjected to computer-assisted semen analysis ( CASA) for sperm kinematics, flow cytometry for sperm apoptosis, thiobarbituric acid assay for malondialdehyde (MDA) concentration, and JC-1 fluorescent staining for the sperm mitochondrial membrane potential (MMP).

RESULTSAfter cryopreservation, sperm motility was markedly decreased in all the groups (P < 0.01). The rate of sperm apoptosis was significantly lower in the Ly5 group than in the Ly0 control ([25.68 ± 4.36]% vs [33.26 ± 4.78]%, P < 0.05), while sperm MMP remarkably higher in the former than in the latter ([66.18 ± 14.23]% vs [55.24 ± 12.31]%, P < 0.05). The Ly2, Ly5 and Ly10 groups showed no statistically significance differences in the MDA level from the Ly0 control (P > 0.05).

CONCLUSIONAddition of lycopene at a proper concentration to cryoprotectant may reduce oxidative damage to sperm mitochondria in the freezing-thawing process, attenuate oxidative stress injury induced by reactive oxygen species to sperm plasma membrane, and improve the anti-apoptosis ability of sperm.

Apoptosis ; Carotenoids ; pharmacology ; Cryopreservation ; Cryoprotective Agents ; pharmacology ; Flow Cytometry ; Humans ; Male ; Malondialdehyde ; analysis ; Oxidative Stress ; Reactive Oxygen Species ; Semen Analysis ; Semen Preservation ; adverse effects ; methods ; Sperm Motility ; Spermatozoa ; drug effects ; physiology

Objective To propose a YOLOv5 lightweight network-based face mask recognition method to solve the problems due to limited storage and computation resources of edge and mobile devices.Methods A YOLOv5 model composed of a backbone network(Backbone),a neck module(Neck)and a head module(Head)was selected as the base framework.Firstly,the Backbone part was modified and replaced using the ShuffleNetv2 lightweight network;secondly,a Ghost module and a C3_S module were introduced in the Neck part;finally,a Shuffle_Yolo_GS_CBAM model was formed by incorporating a convolutional block attention module(CBAM)to improve the detection accuracy.The model was trained and verified with the AIZOO dataset,which was evaluated for face mask recognition by mean average precision(mAP),frames per second(FPS),giga floating-point operations per second(GFLOPS)and parameters.Results The model proposed recognized face masks with the mAP being 89.5％,FPS being 158.7 frames/s,parameters being 2.38 M and and GFLOPS being 4.5 GFLOPS,which had the detection speed enhanced by 39.7％,parameters decreased by 67.3％and operations reduced by73.8％when compared with the YOLOv5s model.Conclusion The method proposed behaves well in increasing detection speed,decreasing parameters and operations and ensuring detection precision,and thus is worthy promoting for face mask recognition on edge and mobile devices.[Chinese Medical Equipment Journal,2024,45(9):7-13]

OBJECTIVETo study the conduction of Gong tonality vibromusic sound wave along meridians in healthy human body, and investigate differences of the sensitivity of different meridians and genders to this vibromusic message.

METHODSEmit the Gong tonality music signal under the water and then investigate the responses of different acupoints and control points at the tissue of the same level to the vibromusic sound wave.

RESULTSThere were differences of sensitivity to music waves at source acupoints on the foot, sensitivity of Zusanli (ST 36) was significantly higher than its control point (P < 0.05), and there was difference between genders in the sensitivity of Sanyinjiao (SP 6) and Yinlingquan (SP 9) to music sound wave.

CONCLUSIONGong tonality vibromusic sound wave can conduct along meridians in healthy human body, and there are differences between different meridians and different genders in the sensitivity to the music sound wave.

Acupuncture Points ; Human Body ; Humans ; Meridians

OBJECTIVETo explore the effects of rearing patterns on diet and temperament traits among infants in urban areas.

METHODSA total of 480 25-30-month-old infants were randomly selected from the birth cohort in Hefei Maternal and Child Health Care Center in 2008. A household survey was conducted using China Toddler Temperament Scale (CTTS), Dietary Characteristics Questionnaire and Family Environment Questionnaire.

RESULTSOf the 430 surveyed households, there were three main rearing patterns including parents rearing pattern (Group A), grandparents rearing pattern (Group B) and joint rearing pattern (Group C), accounting for 33.0%, 21.2% and 45.8%, respectively. Infants in Group A tended to adopt processed food pattern, with poor rhythmicity and adaptability; infants in Group B tended to adopt fruit, vegetable, and cereals-based food pattern, with relatively poor rhythmicity; infants in Group C tended to adopt aquatic products and fruit/vegetable-based food pattern, with good rhythmicity and adaptability. Linear regression model showed that infants who consumed more aquatic products, high-protein food, and fruits/vegetables had more positive temperamental traits, whereas infants who consumed more processed foods had more negative temperamental traits.

CONCLUSIONSA joint rearing pattern may be a favorable rearing style for infants aged 25-30 months in urban areas in terms of diet and temperament traits.

Child Rearing ; Child, Preschool ; Diet ; Humans ; Infant ; Infant Nutritional Physiological Phenomena ; Temperament

OBJECTIVETo evaluate the impacts of maternal weight gain during pregnancy on offspring weight and obesity from birth to 24 months of age.

METHODSThe information on maternal pre-pregnancy body mass index (BMI), gestational weight gain and demographic characteristics were collected from 317 pregnant women. The information on offspring weight, BMI and breastfeeding data was obtained from various follow-up examinations from 0 to 24 months of age.

RESULTSThe logistic regression analysis showed that excessive gestational weight gain resulted in an increased risk of obesity in children at age of 6 months (adjusted RR=3.56, 95% CI:1.31-8.35) and 9 months (adjusted RR=2.87, 95% CI: 1.04-3.28) after adjustment for potential confounding factors. The linear regression model showed that there were significant correlations between gestational weight gain and Z score of weight in offsprings at birth (β=0.032, 95% CI: 0.008-0.057), 3 months (β=0.037, 95% CI: 0.013-0.062), 6 months (β=0.043, 95% CI: 0.017-0.068), 9 months (β=0.038, 95% CI: 0.013-0.063) and 12 months (β=0.034, 95% CI: 0.009-0.059), but not at 18 months and 24 months.

CONCLUSIONSExcessive gestational weight gain may affect offspring weight and increase the risk of obesity in children from birth to 12 months of age. During their second year of life, this effect will temporarily disappear.

Body Mass Index ; Body Weight ; Female ; Follow-Up Studies ; Humans ; Linear Models ; Logistic Models ; Obesity ; etiology ; Pregnancy ; Weight Gain

Objective To explore the transmission chain of COVID-19 by serum antibody detection, and to provide scientific evidence for the prevention and control of the epidemic. Methods Field epidemiological investigation was used to determine the COVID-19 cases and their close contacts. The 2019-nCoV nucleic acid in throat swabs and anal swabs were examined by RT-PCR. Serum specimens were collected for anti-2019-nCoV IgM antibody detection and combined IgM/IgG detection. Results Case A had no confirmed exposure to COVID-19. However, case C and D had dinner and lived together with case A; they reported contact history and dinner history with other confirmed COVID-19 cases(H, L). Case A tested positive for 2019-nCoV nucleic acid, whereas case C and D were negative. Moreover, case A and C were IgM antibody positive, while case D was negative. Case A, C and D were all positive for combined IgM/IgG. In addition, case D had clinical symptom, while case C did not. Conclusion Serum antibody detection can be used as an effective supplement to the inference of transmission chain of COVID-19, which may facilitate determining the source of infection and improving the evidence.

Objective To learn the iodine nutritional status of the vulnerable population with different iodine level under the current level of iodized salt in Shandong province and to offer prevention and cure measures.Methods Five groups of vulnerable population including school children aged 8 - 10, pregnant, lactation women, infants and women of childbearing age from mountain areas ( Daiyue, Mengyin counties ) , plain ( Luxian,Gaomi counties ) and coastal (Zhaoyuan county ) of five different iodine deficient areas were investigated in 2007.The thyroids of children aged 8 - 10 were checked by palpation and B ultrasound, their edible salt iodine level was detected by direct titration. The lever of urinary iodine of vulnerable population was examined by arsenic and cerium speetrophotometry. Results The goiter rates of 8 - 10 year-old were 1.8%(9/514) and 1.2%(6/514), respectively by palpation and B-ultrasonic. The mean iodine of 501 edible salt samples was 30.95 mg/kg. The coverage rate of iodized salt was 94.6% (474/501). The rate of qualified iodized salt was 90.4% (453/501). The median of urinary iodine was 216.7 μg,/L. The urinary iodine of school children aged 8 - 10, pregnant, lactation women, infants and women of childbearing age were 234.0, 165.5, 162.4, 257.5, 233.0 μg/L, respectively. Conclusions Current iodine nutritional level is basically appropriate in all groups of vulnerable people. The current iodine content of iodized salt could meet the needs of population from different iodine deficient areas of Shandong province.

OBJECTIVETo investigate safe range of acetabular prosthesis angle and the optimum combination of cup and neck in the range of activities of daily living (ADL).

METHODSA three-dimensional generic parametric and kinematic simulation module of THA was developed. Range of motion (ROM) of flexion > or = 110 degrees, internal-rotation > or = 30 degrees at 90 degrees flexion, extension > or = 30 degrees and external rotation > or = 40 degrees were defined as the normal criteria for desired ROM for activities of daily living (ADL), and ROM of flexion > or = 120 degrees, internal-rotation > or = 45 degrees at 90 degrees flexion, extension > or = 30 degrees and external rotation > or = 40 degrees as the severe criteria. The range of the changes in the general head-neck ratios (GR), the femoral neck anteversion (FA), the operative anteversion (OA) and operative inclination (OI) of the cup component were 2-2.92, 0 degrees-30 degrees, 0 degrees-70 degrees, 10 degrees-60 degrees respectively. For the collodiaphyseal angle (CCD) of 135 degrees, the corresponding OA related to the OI which every 5 degrees was calculated, and described using dots and lines in a coordinate system in which OI of acetabular cup was the horizontal ordinate and OA of acetabular cup was the vertical ordinate. All data was analyzed by SAS 6.12 software.

RESULTSLarge GR greatly increased the size of safe range and it was recommended that GR be more than 2.37 when the CCD-angle was 135 degrees as it further increases the size of safezone. The size of cup safety range of the severe criteria was smaller than normal criteria. When the CCD-angle was 135 degrees, the optimum relationship between OA of acetabular and FA of the normal criteria and the severe criteria can be estimated by the formula: Y1=-0.816X1 + 39.76 (R2=0.993), Y2=-0.873X2 + 47.04 (R2=0.999) respectively.

CONCLUSIONLarge GR greatly increases the size of safe-zone and it is recommended that GR be more than 2.37, so it extends the acceptable range of error that clinicians cannot avoid it completely. The larger range of the hip motion, the smaller size of the cup safe-zone,but can retrieve by increase the GR. The OA is negative with FA.

Activities of Daily Living ; Arthroplasty, Replacement, Hip ; methods ; Humans ; Range of Motion, Articular