Effects of different doses of metformin on bone mineral density and bone metabolism in elderly male patients with type 2 diabetes mellitus

BACKGROUND Diabetes is a chronic disease,which may cause various complications.Patients with diabetes are at high risk of bone and joint disorders,such as osteoporosis and bone fractures.In addition,it became widely accepted that diabetes has an important impact on bone metabolism.Metformin is a commonly used and effective first-line treatment for type 2 diabetes.Some glucose-lowering agents have been found to have an effect on bone metabolism.The present study explored if different doses of metformin have an effect on bone mineral density(BMD)and bone metabolism in type 2 diabetes.AIM To investigate the effects of different doses of metformin on BMD and bone metabolism in elderly male patients with type 2 diabetes mellitus.METHODS A total of 120 elderly male outpatients with type 2 diabetes mellitus who were admitted to our hospital were included in the study from July 2018 to June 2019.They were randomly assigned to an experimental group and a control group with 60 patients in each group.Patients in the experimental group were given high dose metformin four times a day 0.5 g each time for 12 wk.Patients in the control group were given low dose metformin orally twice a day 0.5 g each time for 12 wk.The changes in bone mineral density and bone metabolism before and after treatment and the efficacy rate of the treatment were compared between the two groups.RESULTS There was no significant difference in the efficacy rate between the two groups(P>0.05).Before the treatment,there was no significant difference in BMD and bone metabolism between the two groups(P>0.05).However,after the treatment,BMD and bone metabolism were improved in the two groups.Moreover,BMD and 25-hydroxyvitamin D were significantly higher in the experimental group than in the control group,and N-terminal/midregion andβ-isomerized Cterminal telopeptides were significantly lower in the experimental group than in the control group(all P<0.05).There was no significant difference in the incidence of adverse reactions between the two groups(P>0.05).CONCLUSION Both high and low dose metformin can effectively control the blood glucose levels in elderly male patients with type 2 diabetes mellitus.However,the benefits of high dose metformin in improving BMD and bone metabolism level was more obvious in patients with type 2 diabetes mellitus.

Effect of a 26-month floorball training on male elderly's cardiovascular fitness, glucose control, body composition, and functional capacity

Background: Floorball training offers a motivating and socially stimulating team activity for older adults, and 12 weeks of floorball training twice a week among men aged 65—76 years have been shown to have positive effects on a number of physiological parameters important for health. However, the effect of long-term participation in floorball training among male elderly has not been investigated. The aim of the present study was to examine the effect of 26-month self-organized regular participation in floorball training on cardiovascular fitness, body composition, blood lipids, glucose control, and physical function among recreationally active men aged 66—78 years.Methods: After completing a 12-week randomized and controlled intervention with floorball and petanque training in the autumn 2014 or spring2015, 15 subjects chose to participate in floorball training(floorball group, FG), whereas 16 subjects resumed their usual lifestyle(control group,CG). FG took part in self-organized floorball training 1.7 sessions of 40 min/week, and CG continued their normal recreationally active lifestyle during a 26-month follow-up period. At baseline and after the follow-up period subjects were tested for cardiovascular fitness, glucose control(resting blood samples), body composition dual-energy X-ray absorptiometry(DXA-scanning), and functional capacity.Results: In FG, the decline in maximal oxygen uptake(VO_(2max)) during the follow-up period was lower(242 ± 379 mL/min, p = 0.01), blood glycosylated hemoglobin(HbA1c) increased less(—1.6 ± 2.9 mmol/L, p = 0.02), and leg bone mineral density increased more(0.03 ± 0.05 g/cm^2,p = 0.02) than those in CG. The effects on body mass, total lean body mass, fat mass, blood lipids, and physical function were similar in FG and CG.Conclusion: Approximately twice weekly floorball sessions with 40 min/session over 26-month appear to reduce age-related decline in cardiovascular fitness and glucose control and improve leg bone mineral density, suggesting that long-term participation in floorball training can be considered as a health-enhancing activity in recreationally active male elderly.

Relationship of serum GDF11 levels with bone mineral density and bone turnover markers in postmenopausal Chinese women

Growth differentiation factor 11 （GDF11） is an important circulating factor that regulates aging. However, the role of GDF11 in bone metabolism remains unclear. The present study was undertaken to investigate the relationship between serum GDF11 level, bone mass, and bone turnover markers in postmenopausal Chinese women. Serum GDF11 level, bone turnover biochemical markers, and bone mineral density （BMD） were determined in 169 postmenopausal Chinese women （47-78 years old）. GDF11 serum levels increased with aging. There were negative correlations between GDF11 and BMD at the various skeletal sites. After adjusting for age and body mass index （BMI）, the correlations remained statistically significant. In the multiple linear stepwise regression analysis, age or years since menopause, BMI, GDF11, and estradiol were independent predictors of BMD. A significant negative correlation between GDF11 and bone alkaline phosphatase （BAP） was identified and remained significant after adjusting for age and BMI. No significant correlation was noted between cross-linked N-telopeptides of type I collagen （NTX） and GDF11. In conclusion, GDF11 is an independent negative predictor of BMD and correlates with a biomarker of bone formation, BAP, in postmenopausal Chinese women. GDF11 potentially exerts a negative effect on bone mass by regulating bone formation.

Study on Bone Mineral Density and its Influencing Factors among 1214 Older Adults in Xuhui District,Shanghai

Objective To understand the status of the forearm bone mineral density （BMD） in older adults, and to identify the potentialfactors influencing BMD. Methods A total of 1 214 older adults were examined, in Tianlin, Fenglin and Xietu sub-districts, of Xuhui district, Shanghai. BMD was tested at the left forearm, including distal radius and ulna 1/3 total, distal radius where the distance of radius and ulna is 8 mm, ultra-distal radius, by single energy X-ray densitometer. Results The BMD at all of the four sites decreased with the age increased. The average BMD was higher in male than in female for the same age and measured site. Distal radius 1/3 total had the highest BMD among the four sites. The incidence of low BMD and osteoporosis in distal forearm 1/3 radius total ascended with the age increased. Multiplied logistic regression showed that males had a lower risk to be low BMD （OR=0. 19） compared with female. Compared with the group aged from 50 to 54, the odds ratio in the group aged from 55 to 59, 60 to 64, and 65 to 70 were respectively 3.17, 5.13, 15.03. Compared with those whose monthly salary was less than 1 000, the odds ratio was O. 70 in those whose salary was more than 1 000. Conclusion The incidence of low BMD was high in older adults, and it is related with sex, age, monthly salary.

Skeletal events of Anastrozole versus Tamoxifen on bone mineral density and bone biomarker osteocalcin in postmenopausal women with early breast cancer

Objective： Postmenopausal women with breast cancer are at increased risk of bone loss because of age related estrogen deficiency face which accelerated with the use of aromatase inhibitors （AIs）. We aimed to study the effect on bone mineral density （BMD） and bone formation biomarker osteocalcin level in postmenopausal breast cancer patients, for the first three years of adjuvant hormonal treatment of both groups Tamoxifen versus Anastrozol. Methods： One-hundered postmenopausal breast cancers were prospectively randomized to receive either Tamoxifen 20 rag/day （n = 50） or Anastrozole 10 mg （n = 50）. Both BMD and osteocalcin were assessed initially before treatment and then at regular intervals for both groups. Results： Use of Tamoxifen was associated with significant annual decrease in osteocalcin （P = 0.001）, whereas Anastrozole group had gradual increase of the annual levels （P 〈 0.01）. BMD decreased significantly in Anastrozole versus Tamoxifen groups （2.6% vs. 0.4%, P 〈 0.001）. Osteoporosis T 〈 -2.5 was reported significantly higher in Anastrozole group （P 〈 0.01）. Women with initial osteopenia in Anastrozole group showed significant decrease in BMD （P 〈 0.05）. The addition of bisphosphonate for patients with early osteoporosis markedly improved both osteocalcin level and BMD. Conclusion： Tamoxifen preserves BMD in postmenopausal breast cancer patients, whereas Anastrozole accelerates age associated fall in BMD especially in the first year of therapy, moreover, the addition of bisphosphonate can help to decrease the skeletal related events associated with treatment to ensure better quality of life with treatment.

The changes of preoperative bone mineral density of patients with nonfunctional pituitary adenoma

Objective To evaluate the bone mineral density (BMD) alteration of patients with nonfunctional pituitary adenoma in Chinese mainland and further to investigate the relevant factors of BMD changes. Methods 31 patients with nonfunctional adenoma and 255 healthy controls were enrolled in this study between December 2007 and May 2008.

中老年男性骨质疏松(OP)危险分层与定量超声骨密度(QUS-BMD)及双能X线骨密度(DXA-BMD)的相关性

目的分析亚洲人骨质疏松(osteporsis,OP)自我筛查工具(osteoporosis self-assessment tool for Asian,OSTA)指数与骨密度(bone mineral density,BMD)的相关性,并探讨跟骨定量超声(quantitative ultrasound,QUS)测定BMD对中老年男性OP的诊断价值。方法对893例45岁以上男性研究对象行QUS-BMD检查,记录跟骨QUS-BMD及QUS-T值,测量身高、体重,计算OSTA指数,其中255例研究对象同时行双能X线(dual-energy Xray absorptionmetry,DXA)BMD测定,按OSTA分层标准将受试者分为OP高、中、低风险组。比较各组间跟骨QUS-BMD、QUS-T以及各部位DXA-BMD的差异,分析OSTA指数与髋部、腰椎DXA-BMD的相关性。根据WHO的OP诊断金标准(骨质疏松:T值≤-2.5,骨量减少:-2.5<T值<-1,骨量正常:T值≥-1)将受试者分为OP组、骨量减少组和骨量正常组,评价跟骨QUS-T值对OP的诊断价值。结果 DXA-BMD测定者中,OP者71例(27.8%),骨量减少者143例(56.1%),骨量正常者41例(16.1%)。OSTA分层高、中、低不同OP风险组中,股骨颈、全髋和全腰椎BMD逐渐升高,高危组明显低于中危组和低危组(P<0.05),而中、低危组间的差异无统计学意义(P>0.05)。OP风险高、中、低危3组中OP患病例数分别为37例(48.7%)、17例(17.5%)和17例(20.7%),高危组中OP患病例数显著高于中、低危组(P<0.05)。Spearman相关分析示OSTA指数与股骨颈、全髋及全腰椎BMD呈显著正相关(P<0.05),相应的相关系数分别为0.448、0.439和0.141。跟骨QUS-BMD和QUS-T值在不同OP风险组间的差异无统计学意义(P>0.05)。跟骨QUS-T值诊断OP的曲线下面积为0.753,最佳截断值为-1.3,相应的灵敏度和特异度分别为77.5%和61.4%。结论随着OSTA指数升高,OP风险降低,股骨颈、全髋及全腰椎的BMD升高,OSTA指数与各部位DXA-BMD成线性正相关。OSTA指数和跟骨QUST值对诊断中老年男性OP症筛查具有一定的价值。

老年女性服用钙复方制剂与BMD、BTMs及25(OH)D水平的相关性研究

目的探讨老年女性服用维生素D和钙复方制剂(以下简称钙复方制剂)与骨密度(BMD)、骨转换标志物(BTMs)及25-羟基维生素D_3[25(OH)D]的相关性。方法选择65□93岁老年女性1 305例为研究对象,根据钙复方制剂服用情况(过去6个月平均每周服用钙复方制剂≥4d为服用)分为服用组384例和未服用组921例,检测并比较两组老年女性BMD、Ⅰ型胶原羧基端肽β特殊序列(CTX)、总Ⅰ型胶原氨基端前肽(P1NP)和N端骨钙素(OC)、25(OH)D和甲状旁腺激素(PTH)水平,进一步比较服用组不同年龄段(65岁□、75岁□、85□93岁)女性BTMs、25(OH)D、PTH水平,并分析未坚持服用钙复方制剂的原因。结果服用组骨质疏松发生率为44.53%,明显低于未服用组的57.76%(P<0.01)。与未服用组比较,服用组CTX、P1NP、OC水平较低(均P<0.01)、25(OH)D水平较高(P<0.01)。3个年龄组间BTMs、25(OH)D水平比较,差异均有统计学意义(均P<0.05)。未坚持服用钙复方制剂的常见原因主要有"认为补钙没有用甚至可能有害""不知道要服用或医生没有配""常常忘记服药,或服用完后懒得再去配""服后胃脘部不适或便秘,或药片太大难以下咽",分别占25.08%、19.54%、15.85%和14.88%。结论老年女性尽早服用钙复方制剂有助于降低BTMs水平,提高血清25(OH)水平,防止骨质疏松的发生。

DEXA测量松质骨BMD与其生物力学相关性

目的研究人股骨头主要承重区骨密度(Bone Mineral Density,BMD)与骨生物力学相关性;探讨双能X线骨密度仪(Dual Energy X-Ray Absorptiometry,DEXA)对股骨颈骨折治疗的临床参考价值。方法收集2002年11月至2004年12月收治的股骨颈骨折患者行假体置换术取下的股骨头共42例。采用双能X线骨密度仪(Dual Energy X-Ray Absorptiometry,DEXA)测量离体股骨头主要承重区BMD值;在股骨头主要承重区取柱状试件,行纵向压缩力学试验,记录极限应力、极限能量和弹性模量。利用SPSS12.0软件对数据进行正态分布检验后,采用双变量相关性分析法(Pearson相关分析法或Spearman相关分析法)判定BMD与极限应力、极限能量和弹性模量的相关性。结果(1)BMD测量值在0.39～1.05g/cm2之间,呈正态分布,为0.71±0.17g/cm2;(2)极限应力在2.09～23.49MPa范围之间,呈非正态分布,为9.69±6.36MPa;(3)极限能量在2.04～11.76J范围之间,呈非正态分布,为5.45±2.80J;(4)弹性模量在16.59～218.58MPa之间,呈非正态分布,为88.89±48.45MPa;(5)人股骨头主要承重区BMD与极限应力具有线性正相关性,rs=0.765,P<0.001;(6)人股骨头主要承重区BMD与极限能量具有线性正相关性,rs=0.717,P<0.001;(7)人股骨头主要承重区BMD与弹性模量具有线性正相关性,rs=0.669,P<0.001;结论BMD与极限应力、极限能量和弹性模量具有线性正相关性,通过测量股骨头的BMD可以初步预测骨的抗压强度和硬度。

绝经前期妇女血清PINP、ICTP和25-OH-VitD_3水平的变化及其与BMD的相关性分析

目的:观察绝经前期妇女血清PINP、ICTP和25-OH-VitD3水平的变化,分析其与骨密度(BMD)的相关性。方法:采用双能X线吸收法(DEXA)对67例绝经前期健康女性进行第(1～4)腰椎(L1-4)、左、右髋部(股骨近段+股骨颈)的BMD测定,并根据BMD测定结果分为BMD正常组和BMD降低组。用放射免疫分析(RIA)测定血清Ⅰ型前胶原氨基端前肽(PINP)、Ⅰ型胶原交联羧基末端肽(ICTP)和25-羟维生素D3(25-OH-VitD3),分析与各部位BMD的相关性。结果:①19例出现BMD降低(28.4%),两组间腰椎及左、右髋部BMD差异显著(P<0.01);②BMD减低组的PINP和ICTP[分别为(56.9±18.2)μg/L和(3.78±0.83)μg/L]高于BMD正常组[分别为(43.8±15.1)μg/L和(3.45±0.98)μg/L],其中PINP差异显著(P<0.05),25-OH-VitD3水平两组间无显著性差异[分别为(25.6±7.8)ng/ml和(27.4±9.2)ng/ml,P>0.05];③PINP与L1-4、左股骨近段、左股骨颈的BMD呈正相关(r=0.274～0.402,P<0.05),ICTP及25-OH-VitD3与BMD无明显相关性(r=-0.226～0.083,P>0.05),PINP与25-OH-VitD3呈一定程度的正相关(r=0.395,P<0.05)。结论:绝经前期妇女有骨转换增高趋势,BMD检查联合骨转换标志物测定有利于识别绝经前期高风险发生骨质疏松的妇女,以指导OP预防性治疗。

青少年强直性脊柱炎早期年龄、身高、体重与L_(1-4)BMC、L_(1-4)BMD相关性初步分析

目的 研究青少年强直性脊柱炎 (Ankylosingspondylitis,AS)早期年龄、身高、体重与腰椎L1 -4骨矿含量 (L1 -4BMC)、腰椎L1 -4骨密度 (L1 -4BMD)的相关性。方法 选择男性青少年AS早期病例 31例。应用DPX -IQ双能X线骨密度仪 (DEXA)检测L1 -4BMC和L1 -4BMD ,分析年龄、身高、体重与L1 -4BMC、L1 -4BMD的关系。结果年龄、身高、体重、L1 -4BMC、L1 -4BMD的测定值分别为 (1 7 5 6± 2 0 1 )岁、 (1 6 8 5 2± 8 5 9)cm、 (5 6 1 3±1 2 72 )kg、 (5 2 1 6± 1 2 1 7)g、 (0 971 1± 0 1 392 ) g/cm2 。L1 -4BMC与身高、体重和年龄呈正相关 (R =0 786 ,Radj2 =0 5 75 ,P <0 0 0 0 1 ) ,其中身高和体重是主要相关因素 (R =0 74 7,Radj2 =0 5 2 6 ,P <0 0 0 0 1 )。年龄、身高和体重因素中仅体重因素进入L1 -4BMD回归方程 (R =0 6 5 7,Radj2 =0 4 1 2 ,P <0 0 0 0 1 )。结论 身高和体重与L1 -4BMC相关 ,体重与L1 -4BMD相关。

Effect of proximal femoral osteoporosis on cementless hip arthroplasty: A short-term clinical analysis

Objective： The aim of this retrospective investigation was to explore the influence of femoral osteoporosis on short-term curative effects ofcementless hip arthroplasty and to evaluate the femoral metaphyseal bone mineral density （BMD） for femoral osteoporosis in order to guide prosthesis choice and rehabilitation. Methods： We performed 127 total arthroplasty operations between June 1999 to February 2003 and investigated 49 cementless hip replacements with the Metalcancellous cementless Lubeck Ⅱ system being used in all hips. There were twenty men and twenty-nine women whose mean age at the time of the operation was 60 years （range, 52-81 years）. The patients were divided into osteoporosis or normal groups according to the femoral metaphyseal BMD measured preoperatively. The average duration of follow-up was 30 months （range, 8-52 months）. We evaluated all of the patients from a clinical standpoint with use of a standard-terminology questionnaire with respect to the short-term curative effects and patients＇ satisfaction. Hip pain status and functional ability were important indicators of treatment efficacy. Results： Harris hip score and patients＇ satisfaction in femoral osteoporosis patients who underwent noncemented hip arthroplasty were lower （P=0.004, P=0.03） while the incidence of thigh pain was higher （P=0.03） than the patients with non-osteoporosis. Conclusion： The higher incidence of pain, as well as the decrease in function experienced by the patients in osteoporosis group, supports the case that cementless arthroplasty is not a better choice for those patients and that we had better select prosthesis based on the femoral metaphyseal BMD.

同一个体腰椎和髋部各部位BMD值及部分部位T值的差异性分析

目的:分析同一个体腰椎和髋部各部位骨密度(bone mineral density,BMD)值及部分部位T值的差异性。方法:选择自然绝经2年以上的女性167名,均行双能量X线吸收测量法(dualenergy X-ray absorptiometry,DXA)扫描,同时对腰椎和髋部进行BMD测定,得出各部位BMD值及部分部位T值。结果:L3、L4 BMD值明显高于L1、L2(P<0.01);L1 T值明显高于L2、L3(P<0.01);股骨干BMD值明显高于股骨颈,股骨颈BMD值明显高于Wards三角大粗隆与大粗隆(P<0.01);股骨颈下半部BMD值明显高于股骨颈上部(P<0.01);Wards三角大粗隆T值明显低于股骨颈、大粗隆(P<0.01);L1~L4 BMD值高于全髋(P<0.05),L1~L4 T值明显低于全髋(P<0.01)。结论:同一个体不同部位BMD值、T值存在显著差异,对于BMD值相对较低的自然绝经后女性,应加强对骨质疏松症的预防工作。

Effect of depot medroxyprogesterone acetate(DMPA) on bone mineral density(BMD) and evaluating changes in BMD after discontinuation of DMPA in adolescent women

Objective To compare bone mineral density （BMD） between users of intramuscular depot medroxyprogesterone acetate （DMPA） and nonhormonal subjects and evaluated the changes in BMD after discontinuation of DMPA.Methods The study included 102 women aged 16-18 years using DMPA for 24 months and 97 same-age nonusers. BMD of the lumbar spine and femoral neck were measured using dual-energy X-ray absorptiometry. The mean BMD values were compared between DMPA users （DMPA group） and nonusers （control group） and the changes of BMD during 36 months after discontinuation of DMPA were observed.Results Mean BMD at the spine and femoral neck did not differ significantly between DMPA group and control group over 12 months, but the BMD values at both anatomical sites were significantly lower in DMPA group than in control group after 24 months treatment. After DMPA discontinuation, the mean BMD values in DMPA users increased substantially. At 24 months after DMPA discontinuation, there were no significant differences between DMPA group and control group. But the values of the lumbar spine and femoral neck BMD in DMPA group were still 1.70% and 1.87%, respectively, below nonusers at 36 months after DMPA discontinuation.Conclusion The use of DMPA for short-term （ ≤12 months） had no significant effects on BMD at spine and femoral neck, but long-term exposure to DMPA had significant loss in BMD in adolescents. Bone loss occurring with DMPA use is reversible after DMPA discontinuation.

Optimization of Physical Activity as a Countermeasure of Bone Loss: A 5-Year Study of Bikram Yoga Practice in Females

Over the last decade, the number of people diagnosed with osteoporosis has increased dramatically due to many factors. While it has been asserted that one variable associated with preserving bone health is participation in high-impact exercises, those same exercises are also well documented to damage the hip and knee joints. Therefore, the goal of the present study was to evaluate the potential benefits of a highly regimented, low impact weight-bearing exercise, Bikram Yoga. Specifically, the bone mineral content was measured using DEXA analysis of the proximal femur and lumbar spine of nine female Bikram Yoga instructors between the ages of 30 and 59, who not only participated in a minimum of 3 classes (4.5 hours) a week, but also actively taught Bikram Yoga classes. These same participants, who remained active as instructors and practitioners, were rescanned five years later. The results of the study, which focused on the percent change in individual bone mineral density over the five-year period were as follows: the premenopausal subjects showed a mean increase in BMD of 6.6% at the femoral neck, 2.0% for the total hip, and 1.0% for the total lumbar spine. In contrast, post-menopausal subjects revealed a mean decrease in bone mineral density (BMD) of ﹣6.0%, ﹣8.1%, and ﹣5.6% in the femoral neck, total hip, and total lumbar spine, respectively. Consequently, the results of this study suggest that performing Bikram Yoga may preserve, or even perhaps, increase bone mineral density in pre-menopausal women and hence, may be an effective countermeasure for preventing osteoporosis.

Bikram Yoga as a Countermeasure of Bone Loss in Women

The purpose of this pilot study was to observe whether Bikram Yoga training helps bone growth or arrest bone loss in women. In this study, the bone mineral density (BMD) was measured at the hip, spine and whole body for a group of 14 pre-menopausal women (11 Caucasians, 2 Asians and 1 African Ameri-can). These 14 women had participated in Bikram Yoga classes (26 yoga postures) at least 3 times a week for 3 or more years. DEXA scans were used to measure BMD at the lumbar spine, hip and the whole body. In addition, the Z-scores were calculated for each subject at these three locations. The study results indicate that the BMD at these body areas of this group of women is generally above the mean BMD expected for normal, healthy, women of comparable age and ethnicity. Overall, the study findings suggest that the intervention of Bikram Yoga training may be beneficial for skeletal health and could prevent bone loss.

佛山市成年居民骨密度CT定量研究

目的:研究佛山地区成年人椎体骨密度(BMD)与性别、年龄的关系,探讨本地区不同年龄段BMD均值及各年龄段骨质疏松症(OP)的发病率。方法:对佛山市中医院2021年10月至2023年3月的1 065例(男性648例,女性417例)健康成年人体检者使用定量CT(QCT)行椎体BMD检测,按年龄段进行分组;采用t检验和方差分析对不同性别、不同年龄段BMD值进行检验,采用χ2检验和相关分析对不同性别、不同年龄段的OP发病率进行分析。结果:20~29岁、30~39岁、40~49岁及60~69岁、70~79岁不同性别间的BMD差异均有统计学意义,女性BMD在青中年时期高于男性。在40~49岁、50~59岁、60~69岁、70~79岁男性组及30~39、40~49岁、50~59岁、60~69岁女性组中,同性别不同年龄段间的BMD值差异有统计学意义,且随年龄的增长呈下降趋势;同性别不同年龄段的OP发病率差异均有统计学意义,年龄与OP发病率呈正相关关系(r男=0.517,r女=0.636)。结论:佛山市健康成年人QCT测量的椎体BMD与性别、年龄相关,在20~29岁达到峰值,随年龄的增长而下降;从40~49岁开始,OP发病率在男性和女性中随着年龄的增长而增加。

放射性核素对双能X射线骨密度仪检测骨密度的影响研究

目的:研究核医学检查和治疗中常用放射性核素对双能X射线骨密度仪(DXA)检测骨密度(BMD)的影响。方法:对DXA设备专用质量保证(QA)模块和脊椎模体均进行常规扫描,在QA模块旁及脊椎模体的水槽中分别加入常用放射性核素锝99m(^(99)Tc^(m))-亚甲基二膦酸盐(^(99)Tc^(m)-MDP)、氟18(^(18)F)-氟代脱氧葡萄糖(^(18)F-FDG)和碘[^(131)I]化钠(Na^(131)I)后扫描,对检测所得高、中、低BMD值、身体成分百分含量值、第1、2、3、4节腰椎(L_(1)、L_(2)、L_(3)、L_(4))及4节腰椎平均(L_(1)~L_(4))BMD值、T值进行对比分析。结果:在QA模块旁分别放置^(99)Tc^(m)-MDP、^(18)F-FDG、Na^(131)I后的扫描与QA模块的常规扫描所得高、中、低BMD值及身体成分百分含量值相比,差异均无统计学意义(F_(BMD值)=1.621、0.259、0.099,F_(身体成分百分含量值)=0.367、0.151、0.635;P>0.05);向脊椎模体的水槽中分别注入放射性核素^(99)Tc^(m)-MDP、^(18)F-FDG、Na^(131)I后的扫描和脊椎模体的常规扫描所得L_(1)、L_(2)、L_(3)、L_(4)及L_(1)~L_(4)的BMD值及T值相比,差异均无统计学意义(F_(BMD值)=0.435、0.529、0.507、0.489、0.516,F_(T值)=0.634、1.585、0.961、0.777、0.801;P>0.05)。结论:核医学检查和治疗中常用放射性核素^(99)Tc^(m)-MDP、^(18)F-FDG、Na^(131)I对DXA检测BMD无影响。

动态四点跪位训练对脊髓损伤患者髋关节骨密度及下肢运动功能的影响

目的:探讨脊髓损伤患者进行动态四点跪位训练对髋关节骨密度及下肢运动功能的影响。方法:采用前瞻性随机对照研究方法,选取2019年1月至2022年1月收治的80例脊髓损伤患者,采用随机数字表法分为对照组与观察组各40例,对照组采用常规康复训练+直立床训练,观察组采用常规康复训练+动态四点跪位训练,两组均连续干预12周。干预前及干预4周、8周、12周时,分别记录髋关节骨密度、下肢臀大肌及腘绳肌肌电信号、感觉评分、下肢运动功能评分(LEMS),股四头肌、臀大肌及腘绳肌的肌张力(改良Ashworth分级)和肌力,并统计两组不良事件(体位性低血压、膝关节疼痛、摩擦伤、跌倒)发生情况。结果:干预4周、8周、12周时,两组髋关节骨密度T-值均低于干预前,观察组高于对照组(P<0.05);干预4周、8周、12周时,两组表面肌电信号积分肌电值及LEMS均高于干预前,且观察组高于对照组(P<0.05);干预前及干预4周、8周、12周时,两组感觉评分差异无统计学意义(P>0.05);干预4周、8周、12周时,观察组肌张力低于对照组(P<0.05),肌力高于对照组(P<0.05);两组不良事件发生率比较差异无统计学意义(P>0.05)。结论:动态四点跪位训练可以在部分负重下通过动态训练刺激髋关节周围肌肉收缩以延缓脊髓损伤患者髋关节骨量流失,改善损伤平面以下下肢运动功能,且安全性较好。

早期抗阻训练在髋关节置换术患者中的应用价值

目的 探讨早期抗阻训练在髋关节置换术患者中的应用价值。方法 选取2021年1月—2022年6月中国人民解放军联勤保障部队天津康复疗养中心的80例髋关节置换术患者,依据随机数字表法分为2组。对照组的40例患者进行常规训练,观察组的40例患者进行早期抗阻训练。比较2组的关节功能总优良率,术前、术后的Charnley髋关节功能评分及假体周围骨密度。结果 观察组术后6、12个月关节功能总优良率分别为95.00%、100%,高于对照组的77.50%、87.50%(P<0.05);术前,2组Charnley髋关节功能评分及假体周围骨密度比较,差异无统计学意义(P>0.05);观察组术后6、12个月后Charnley髋关节功能评分及假体周围骨密度均高于对照组(P<0.05)。结论 早期抗阻训练在髋关节置换术患者中的应用效果较好,可更为有效地改善患者关节功能及假体周围骨密度,在髋关节置换术患者中的应用价值较高。