Using laparoscope to remove an ectopic intrauterine device in the anterior wall of urinary bladder:A case report

BACKGROUND An intrauterine device(IUD)is a contraceptive device placed in the uterine cavity and is a common contraceptive method for Chinese women.However,an IUD may cause complications due to placement time,intrauterine pressure and other factors.Ectopic IUDs are among the most serious complications.Ectopic IUDs are common in the myometrium and periuterine organs,and there are few reports of ectopic IUDs in the urinary bladder,especially in the anterior wall.CASE SUMMARY A 52-year-old woman was hospitalized due to a urinary bladder foreign body found via abdominal ultrasound and computed tomography(CT)examination.The patient had a 2-year history of recurrent abdominal distension and lower abdominal pain,accompanied by frequent urination,urgency,dysuria and other discomfort.Ultrasound examination revealed foreign bodies in the bladder cavity,with calculus on the surface of the foreign bodies.CT revealed a circular foreign body on the anterior wall of the urinary bladder,suggesting the possibility of an ectopic IUD.After laparoscopic exploration,an annular IUD was found in the anterior wall of urinary bladder,and an oval calculus with a diameter of approximately 2 cm was attached to the surface of the bladder cavity.The IUD and calculus were successfully and completely removed.The patient recovered well after surgery.CONCLUSION Abdominal ultrasound and CT are effective methods for detecting ectopic IUDs.The IUD is located in the urinary bladder and requires early surgical treatment.The choice of surgical method is determined by comprehensively considering the depth of the IUD in the bladder muscle layer,the situation of complicated calculus,the situation of intravesical inflammation and medical technology and equipment.

Postpartum Intrauterine Device: Use and Follow-Up of Users in the Maternity Ward of the Ratoma Communal Medical Center in Conakry, Guinea

Objective: The aim of this study was to describe the use of the postpartum intrauterine device in the maternity ward of the Ratoma communal medical center in Conakry. Methods: This was a descriptive cross-sectional study carried out between July 1st 2015 and June 30 2016, i.e. a duration of one year. Results: A total of 551 patients received advice on various contraceptive methods. Most of this advice was given in the post-partum period (40.2%) and during antenatal care (39.1%). Of the patients advised, 87 (15.8%) used the intrauterine device. The majority of users (93%) were married and uneducated (63.2%), and 39.1% were poor. The majority (56.3%) of intra-uterine devices were inserted in the immediate post-partum period. The majority of women had no adverse events either during the first six weeks (n = 57;65.5%) or at 3rd months (n = 75;86.2%) or 6th months (n = 76;87.4%) after IUD insertion. Most users remained complication-free throughout the follow-up period (n = 76;87.4% at 6th weeks and 3rd months, and n = 77;88.5% at 6th months). The continuation rate was 89.7% at 6 weeks and 3rd months, and 87.4% at 6th months after insertion. The majority of users (87.0%) were satisfied with the care they received. Conclusion: This study showed very few complications among intrauterine device users, and high continuation and satisfaction rates. The intrauterine device is a long-acting, effective, reversible and safe contraceptive that can be used by most women for birth spacing in Guinea, where women do not regularly visit health facilities.

Postpartum intrauterine device contraception: A review

AIM： To review the safety （infection, perforation） and efficacy （expulsion, continuation rates, pregnancy） of intrauterine device （IUD） insertion in the postpartum period. METHODS： MEDLINE, PubMed and Google Scholar were searched for randomized controlled trials and prospective cohort studies of IUD insertions at different times during the postpartum period. Time of insertion during the postpartum period was documented speci-fically, immediate post placenta period （within 10 min）, early post placenta period （10 min to 72 h）, and de-layed/interval period （greater than 6 wk）. Other study variables included mode of delivery, vaginal vs cesarean, manual vs use of ring forceps to insert the IUD. RESULTS： IUD insertion in the immediate postpartum （within 10 min of placental delivery）, early postpartum （10 min up to 72 h） and Interval/Delayed （6 wk onward） were found to be safe and effcacious. Expulsion rates were found to be highest in the immediate postpartum groups ranging from 14% to 27%. Immediate post placental insertion found to have expulsion rates that ranged from 3.6% to 16.2%. Expulsion rate was significantly higher after insertion following vaginal vs cesarean delivery. The rates of infection, perforation and unplanned pregnancy following postpartum IUD insertion are low. Method of insertion such as with ring forceps, by hand, or another placement method unique to the type of IUD did not show any signifcant difference in expulsion rates. Uterine perforations are highest in the delayed/interval IUD insertion groups.Breastfeeding duration and infant development are not affected by delayed/interval insertion of the non-hormonal （copper） IUD or the Levonorgestrel IUD. Timing of the Levonorgestrel IUD insertion may affect breastfeeding. CONCLUSION： IUD insertion is safe and efficacious during the immediate postpartum, early postpartum and delayed postpartum periods. Expulsion rates are highest after vaginal delivery and when inserted during the immediate postpartum period. IUD associated infection rates were not increased by insertion during the postpartum period over interval insertion rates. There is no evidence that breastfeeding is negatively affected by postpartum insertion of copper or hormone-secreting IUD. Although perforation rates were higher when inserted after lactation was initiated. Randomized controlled trials are needed to further elucidate the consequence of lactation on postpartum insertion. Despite the concerns regarding expulsion, perforation and breastfeeding, current evidence indicates that a favorable risk beneft ratio in support of postpartum IUD insertion. This may be particularly relevant for women for whom barriers exist in achieving desired pregnancy spacing.

Giant exophytic cystic adenomyosis with a levonorgestrel containing intrauterine device out of the uterine cavity after uterine myomectomy: A case report

BACKGROUND A cystic lesion arising from the myometrium of the uterus, termed as cystic adenomyosis, has chocolate-like, thick viscous contents and contains various amounts of endometrial stroma below the glandular epithelium. It is an extremely rare type of adenomyosis.CASE SUMMARY Herein, we report an unusual case of a giant cystic mass in the pelvic cavity after uterine myomectomy. The patient complained of abnormal uterine bleeding and severe dysmenorrhea. After a levonorgestrel-containing intrauterine device(LNG-IUD) was inserted, her symptoms were greatly alleviated. However, the LNG-IUD was detected in the cystic cavity during the follow-up. For fear of the intrauterine device migrating into and damaging the surrounding viscera,surgical treatment was proposed. Therefore, laparoscopic resection of the lesion and removal of the LNG-IUD were performed and cystic adenomyosis with an LNG-IUD out of the uterine cavity was diagnosed.CONCLUSION We believe that myomectomy breaking through the endometrial cavity may have been a predisposing factor for the development of cystic adenomyosis in this case.

Pre-Clinical Experimental Studies of Indomethacin-Releasing Copper Intrauterine Device

Effects of two types of intrauterine device (IUD) on the prostaglandins and endothelin (ET) in uterus and on the endometrial morphology in rats and rabbits, and Cu 2+ releasing amounts of both IUDs in vitro were observed. The results showed that the inhibiting action of the indomethacin releasing copper IUD (FICu IUD) on the PGI 2 was stronger than that on the TXA 2, the ratio of 6 keto PGF 1α /TXB 2 was reduced with the increase of the doses. There were significant differences between the groups. The FICu IUD could inhibit the rising of the ET level and lighten the endometrial impairment caused by the FCu IUD, and promote copper ion release. It was suggested that indomethacin released by FICu IUD could effectively reduce abnormal uterine bleeding.

Ectopic intrauterine device in the bladder causing cystolithiasis:A case report

BACKGROUND An intrauterine device(IUD)is a commonly used contraceptive among women in China.It is widely used because it is safe,effective,simple,economic,and reversible.Among the possible complications,an ectopic IUD in the bladder is rare.It occurs insidiously,has a long course,is associated with a high risk for injury,and is difficult to treat.CASE SUMMARY A 44-year-old woman was admitted for repeated episodes of urinary frequency,urgency,and dysuria over three months.Laboratory tests revealed significantly elevated urine leukocytes and bacteria.Urine culture suggested colonization with Enterococcus faecalis.Abdominal computed tomography images suggested an abnormally positioned IUD that was protruding into the bladder.Cystoscopy revealed a metallic foreign body with multiple stones on its surface in the left posterior bladder wall.The foreign body measured approximately 1 cm.Hysteroscopy revealed the arm of a V-type metal IUD embedded in the middle and upper sections of the anterior wall of the cervical canal.The majority of the IUD was located in the uterine cavity.Cystoscopy was performed,and a holmium laser was utilized to break the stones attached to the portion of the IUD in the bladder.The IUD was then removed through hysteroscopy.CONCLUSION Ectopic IUDs in the bladder can be diagnosed with thorough imaging and safely removed through cystoscopy or hysteroscopy.

Effect of Domestically-made Levonorgestrel-releasing Intrauterine Device on the Endocrine System and Mensentruation in Monkeys

Effect of domestically-made levonorgestrel-releasing intrauterine device (LNG, release rate: 6 μg/day) on the endocrine system and menstruation in mondeys was investigated. The results showed that the Estradiol (E2) and progesterone (P) levels were significantly decreased 2 ovulatory cycles after iusertion of the devices as compared with those before insertion in 3 monkeys (P>0. 001) ,suggesting an evident ovulation-suppressing effect. In 1 monkey, the E2 and P levels were the same before and after insertion,and expulsion of device was found in the monkey later. The plasma LNG concentration in 3 animals was 493. 69-454. 60 pg/ml and plasma LNG was not detected in 1 monkey. The hormone level returned to normal level after removal of the devices.

Com parison betw een Two Techniques Used in Im m ediatePostplacentalInsertion of TCu 380AIntrauterine Device:36-Month follow-up

Three hundred and eighty four women in Shanghai who delivered vaginally and chose IUD for contraception received the copper T 380A IUD inserted vaginally within 10 min after delivery of the placenta(i.e.,immediate postplacental insertion, IPPI). Among them, 98.70% were primipara. The women were randomly divided into two groups: IUD inserted by hand and IUD insreted by ring forceps. Using Life Table Method and χ 2 test, expulsion and other discontinuation rates were compared at 6, 12, 24, and 36 months post insertion between these two different groups. No uterine perforation, infection or prolonged period of lochia occurred in the 384 cases. Expulsions were the main reason for discontinuation. From 6 months to 36 months, the gross cumulative rates of all discontinuation events (expulsion, pregnancy, removal for bleeding/pain, etc.) were not statistically significantly different (P>0.05). The results suggest that these two different insertion techniques do not significantly affect discontinuation rate in vaginal IPPI using the TCu 380 A, which appears to be suitable for postpartum insertion in Chinese women. Other relevant issues, such as breast feeding and IUD position in uterine cavity, are also analyzed and discussed in this paper.

Opinions and Perceptions of Gynecologists and Midwives on the Use of the Intrauterine Device in Senegal

Objective: The purpose of this study was to analyze the opinions of gynecologists, midwives, and interns/Specialist students practicing in Senegal about the use of IUD, and to assess factors that stand as obstacles to IUD prescribing. Patients and methods: An online questionnaire was developed to assess providers’ IUD practices and attitudes. The questionnaire was based on the one used in a Swiss study on the same topic. The platform used was Google forms. The questionnaire was shared in associative platforms involving gynecologists, midwives and interns/Specialist students. Results and comments: We received 292 feedbacks. Gynecologists represented 13.7% of the sample, interns and specialist students 11.3% and midwives 76%. Parity is a determining factor in IUD selection. The care-providers were concerned about the followings, which might have prevented the use of IUD, even though it was indicated: infections (75.7%), pelvic pain (61.3%), expulsion (48.3%), increased risk of perforation (46.9%), women’s appreciation (45.2%), ectopic pregnancy (33.9%) and sexual behavior (28.4%). Conclusion: Our study reveals that providers’ apprehensions and concerns severely limit the availability of IUDs. These concerns are often unfounded, based on personal experiences and not on official recommendations. Parity is a major obstacle.

Barriers to Intrauterine Device Use at an University-Based Women’s Clinic

Objective: The purpose of this study was to determine the barriers to intrauterine device (IUD) use at a University-Based Women’s Clinic. Methods: This study is a cross-sectional survey of a convenience sample of subjects receiving obstetrical care at a University-Based Women’s Clinic. Eligible women who consented to participate self-administered a 16-question survey during a routine prenatal visit. Descriptive statistics were used to report participants’ demographics and history of contraception use. Additionally, subjects were asked if they would consider IUD use in the future. Results: A total of 160 women participated in this study. The average age of this sample was 24.9 (SD = 6.3). The majority were in low income and low education categories. Only 5% of women reported previous IUD use. 27% of women surveyed desired more information regarding IUD contraception. 19% of participants would consider using an IUD in the future and 25% would consider?IUD in the future if they knew more about them. Insurance and financial constraints were cited as barriers to IUD use. 4% of the sample reported that they had used an IUD previously and were unhappy with it due to pain and discomfort. 18% would not consider an IUD because they had heard about side effects. 68%?of the surveyed sample reported unintended pregnancies. Conclusion: The two most common barriers to IUD use in this patient population was lack of knowledge?and concern about side effects. Increasing patients’ knowledge of IUDs has the potential to increase IUD utilization in this clinic population which reported a 68% rate of unintended pregnancy.

A comparative, randomized study of levonorgestrel Intrauterine System (LNG-IUS) vs Copper T 380 A intrauterine device applied during cesarean section

Objective: To assess levonorgestrel-releasing intrauterine system LNG-IUS (Mirena?) application at caesarean section (CS). Design: Randomized, comparative study. Setting: Department of obstetrics and gynecology in a primary reference hospital at Puebla City, Mexico. Sample: 396 women requiring CS signed informed consent and were randomly allocated to the post-placental application of LNG-IUS (198) or Copper T 380 A (198). Methods: Follow up visits at 6 weeks, and 6 and 12 months were performed. Main Outcomes Measures: IUDs expulsion, maternal and babies’ health conditions, breastfeeding and menstrual patterns, adverse effects and pregnancies. Differences between groups were analyzed by Fisher and X2 tests, Odds ratios, relative risk and 95% confidence limits, as appropriate. Results: After one year of follow up, no pregnancies were reported. The IUD expulsion rate was 4.5% in each group. LNG-IUS users had a higher incidence of amenorrhea (OR 2.5 95% CI 2.2 - 3) and menstrual patterns significantly brief and lighter than Copper T 380 A (p < 0.001) with lower incidence of dysmenorrhea (OR 0.1 95% CI 0.04 - 0.2). No detrimental effects of LNG-IUS on breastfeeding was observed and interestingly babies weights of LNG-IUS users was slightly above the average for age compared with Copper T 380 A users. This was probably related with a major proportion of women with normal ferritin serum levels (94% vs 68%) leading to better mother’s general condition. Conclusions: LNG-IUS inserted during CS provides high efficacy contraception with additional benefits, mainly reducing menstrual bleeding and doing so, faster recovery of ferrous homeostasis after CS.

Intravesical Migration of Intrauterine Device and Calculi Formation 12 Years Post Missing: A Case Report

Intraunterine device (IUD) is a safe, effective and feasible method used for reversible contraception worldwide. Transvesical migration of an Intrauterine device (IUD) is a rare complication. We describe a case in whom initially a plain abdominopelvic radiography demonstrated calcified string of an IUD in a 42-year-old woman with recurrent lower urinary symptoms (LUTS) and urinary tract infection since 2 years earlier. The IUD had been inserted 12 years earlier and 3 years after placement of the IUD, the patient experienced an uneventful pregnancy and a successful delivery. Sonographic images and later on the cystoscopic procedure confirmed the diagnosis of transvesical migration of the IUD. The IUD was removed using cystoscopic procedure, leaving no complication.

Role of IL-6 in the contraceptive mechanism of intrauterine device

目的 :探讨血清中白细胞介素 - 6(IL- 6)水平与宫内节育器 (IUD)存在的关系。方法 :采用酶联免疫吸附试验测定 64例置器妇女 (试验组 ,试验组又分为置器出血组和无出血组 ) ,以及60例健康妇女 (对照组 )血清中 IL- 6水平 ,同时测定两组血清中 C-反应蛋白 (CRP)水平。结果 :试验组 64例中有 31例血中 IL- 6水平升高 ,与对照组相比差异显著 (P<0 .0 1 )。但其中置器出血组与不出血组中 IL- 6水平无统计学差异 (P>0 .0 5)。试验组及对照组血清中 CRP检验结果均为阴性。结论 :宫内节育器引起子宫内膜无菌性炎症反应 ,导致部分妇女血清中 IL- 6水平升高。IL-

Uterine Artery Rupture After Induced Abortion and Extraction of an Intrauterine Device

An intrauterine device （IUD） is a safe, effective, simple, and reversible method tbr birth control, but some women with IUD may still become pregnant. Induced abortion is the main method for termination of pregnancy. If induced abortion is not well-managed in these patients, it may result in serious vaginal bleeding and uterine rupture. We report a case of uterine artery rupture after induced abortion combined with extraction of an IUD. This case highlights the necessity of a standard operation for complicated induced abortion, and the value of interventional therapy, such as uterine artery embolization （UAE）, for controlling serious vaginal bleedit3g.

Effects of Copper-Containing Intrauterine Devices on the Endometrium

The use of copper-containing intrauterine devices(Cu-IUDs)is a safe,effective,and long-term contraceptive method.Here,we review the effects of Cu-IUDs on subsequent pregnancy and the morphology,local coagulation function,sensitivity to estrogen and progesterone,cell proliferation,and immune response of the endometrium.Studies on the morphology of endometrium indicate that the use of Cu-IUDs can affect the number and binding capacity of estrogen and progesterone receptors in the endometrium and reduce the response of the endometrium to estrogen and progesterone.The use of Cu-IUDs can also affect the proliferation of endometrial cells,suggesting that the aseptic inflammation caused by Cu-IUDs may differ from chronic infectious or noninfectious inflammation;this highlights that the use of Cu-IUDs provides protection against endometrial proliferative diseases.The use of Cu-IUDs increases local endometrial angiogenesis,bleeding tendency,and fibrinolytic activity,which can result in prolonged menstruation or abnormal uterine bleeding.Additionally,the use of Cu-IUDs can cause the infiltration of numerous lymphocytes,monocytes,macrophages,and other inflammatory cells around the endometrial gland and changes in endometrial immune function,immune cell function,and the number and type of immune molecules.Cu-IUD-induced decidual injury significantly increases the invasiveness of trophoblasts,further affecting the aberrant expression of their growth-,angiogenesis-,and invasion-related factors and improving the formation of the placenta.Moreover,the endometrial damage caused by Cu-IUD placement before embryo transfer can improve both clinical pregnancy and live birth rates;however,specific changes in the immune system after Cu-IUD use as well as its effects on future pregnancies require further investigation.

Biosocial Profiles and Pattern of Complaints of New Intrauterine Device Acceptors at the University College Hospital,Ibadan,Nigeria

Objective To determine the pattern of biosocial characteristics of the new IUD acceptors and describe their concerns. Methods This was a retrospective review of records of new IUD acceptors at the University College Hospital, Ibadan, Nigeria from January to December 2007. Results The age range of subjects was 19 to 49 years with a mean of 33.5 ±% 2.4 years. The commonest source （46.0%） of clientele referral was through the health care providers -doctors and nurse/midwife. Other referral patterns were from friends/ relative （23.5%）, media -TV and radio （17.0%）, outreach programmes （7.3%）, self referral （5.2%） and others -the source was not indicated （1.2%）. Of the total participants, only 239 （56.1%） reported for follow-up visits. Majority had at least one visit; about a third had two, while others had three or four and above visits. About 43.2% of those at follow-up visits had complaints. The commonest （37.5%） complaint was menstrual irregularity. Other complaints were cramping abdominal pain （22.2%）, vaginal discharge （19.6%）, amenorrhoea （10.3%）, penile discomfort during sexual intercourse （4.3%）, expulsion of IUD （3.8%） and 2.2% of missing IUD. Conclusion This audit shows that new IUD acceptors are largely referred by health care providers and are mainly offered the TCu380A version. Community outreach programmes as alternative strategy is likely to boost the uptake of this particular method in Nigeria.

Vaginal Testosterone Propionate with Misoprostol Prior to Removal of Intrauterine Devices in Postmenopausal Women

Objective To explore and investigate a new treatment of releasing the risks and pain in removing intrauterine devices （IUD） from postmenopausal women. Methods Totally 240 postmenopausal women who needed to remove IUD were randomly divided into 3 groups. Group A （n =80） were preoperatively treated with 20 g/L vaginal testosterone propionate cod liver oil ointment （1 g/d） over a 2-week span of period, and vaginal misoprostol （200 μg） was one-time used at 2-3 h before operation. Group B （n =80） were treated with oral estradiol valerate （3 mg/d） from 7 d before operation. Other 80 women （group C） were treated with vaginal cod liver oil ointment （1 g/d） over a 2-week span of period before the operation day. The degree of cervical relaxation, operational difficulty, blood loss volume, the length of operation time and visual analogue scales （VAS） were evaluated, also the serum estradiol, testosterone and endometrial thickness were measured before and after medication. Results The degree of cervical relaxation, operational difficulty, blood loss, the length of operation time and VAS in group A were significantly better than those group C （P〈0.01）, whiles its blood loss volume was less than group B （P〈0.05） and there were no significant differences in serum estradiol, testosterone and endometrial thickness before and after medication. Conclusion Preoperative vaginal testosterone propionate combined with misoprostol would reduce the operational difficulties/risks and release the suffering of patients. The study may represent a safe and effective alternative to remove IUD in postmeno- pausal women.

Evaluation of Hysteroscopic-guided Removal of Intrauterine Device in Shanghai: A Report of Four Dead Cases

Objective To analyze the possible cause leading to death during the procecture oy IUD removal under hysteroscopy and how it could be prevented. Methods All （11 110） cases of IUD removal under hysteroscopy performed at 87 hospitals in Shanghai from 2001 to 2007 were reviewed. Four dead cases were reported. Results Air embolism was suspected as the cause of death. Associated risk factors included insufficient preoperative preparation, short duration between surgeries, non-standard procedure, careless observation and untimely resuscitation. Conclusion This emphasizes the necessity of early interventions taken such as prevention, early detection and management of the fatal complications.

Cytotoxicity of six copper-bearing intrauterine devices on Chinese hamster ovary cells: the influence of frame, shape and copper surface area

Objective To evaluate the cytotoxicity of six commonly used copper-bearing intrauterine devices （Cu-IUDs） on Chinese hamster ovary （CHO-K1） cells and to investigate the influence of frame, shape and copper surface area of Cu-IUDs on cell toxicity.Methods Cu-IUDs were incubated in 10% FBS-DMEM/F12 culture medium at 37 ℃ for 24 h. The extracts were analyzed by flame atomic absorption spectrometer and were then diluted into different concentrations with culture medium. Finally, cytotoxicity of these original and diluted extracts on CHO-K1 cells was detected by cell counting kit-8 （CCK-8） assay.Results The viabilities of cells treated with the original extracts of six Cu-IUDs （TCu220C bulb, TCu220C, GCu220, GCu300, Yuangong Cu270 and Yuangong Ⅱ- 300） were all below 10% and the cupric ion concentrations in these extracts were 28.22 mg/L, 31.80 mg/L, 92.80 mg/L, 99.74 mg/L, 114.90 mg/L and 119.20 mg/L, respectively. After these original extracts were diluted, significant differences in cytotoxicity were exhibited. IUDs with larger copper surface areas （GCu300 and Yuangong Ⅱ-300） showed more cytotoxicity than those with smaller areas （GCu220 and Yuangong Cu270） respectively; When different shapes of Cu-IUDs were compared, TCu220C bulb showed lower cytotoxicity than TCu220C, and GCu300 exhibited higher toxicity than Yuangong Ⅱ-300; TCu220C displayed significantly lower cytotoxicity than GCu220 due to their differences in frames.Conclusion We presented evidence on the cytotoxic effects of copper ions released from Cu-IUDs on CHO-K1 cells and found that shape, frame together with copper surface area of Cu-IUDs had obvious influence on the cytotoxicity.

Releasing of Cupric Ion of Three types of Copper-bearing Intrauterine Contraceptive Device in Simulated UterineFluid

Objective To compare the cupric ion releasing in vitro o.f the three IUDs. Methods The stability o.f cupric ion releasing o.f IUDs including TCu 380.4 IUD （TCu 380A）, Multiload Cu375 IUD （MCu 375） and Yuangong 365 copper-bearing indomethacin-releasing IUD （Yuangong 365） by the determination of cupric ion releasing in simulated uterine fluid. The simulated uterine fluid was used for releasing media. Copper ion was determined by flame atomic absorption spectrometer. Results The cupric ion releasing of three IUDs were instable at the beginning and tend to be stable gradually. In the stable phase, the average level of cupric ion releasing of TCu380A, MCu375 and Yuangong 365 were 4.25±2.71-7.62±6.42 μg, 4.92±1.23 -8.62±3.08 μg and 2.19±0.40-4.68±1.66 μg, respectively. TCu380A had higher instable releasing level than those of Yuangong 365 （P〈0. 05）. Conclusion TCu 380.4 and MCu 375 showed a ＂burst release＂ during the first few days and the.former was of great significance（P〈0.05）. The initial cupric ion releasing of Yuangong 365 appeared to be the lowest, followed by MCu375 and TCu380A in a releasing order