Effect of posterior condylar offset on clinical results after posterior-stabilized total knee arthroplasty

Purpose： To determine the effect of the posterior condylar offset （PCO） on clinical results after total knee arthroplasty （TKA） using a high-flex posterior-stabilized （PS） fixed-bearing prosthesis. Methods： We prospectively studied the clinical and radiographic materials of 89 consecutive female patients （89 knees）, who had undergone primary TKAs for end-stage osteoarthritis. All operations were performed by a single senior surgeon or under his supervision using the same operative technique. Based on the corrected PCO change, we divided all cases into two groups： group A （corrected PCO change _〉0 mm, 58 knees） and group B （corrected PCO change 〈0 ram, 31 knees）. One-year postoperatively, clinical and radiographic variables from the two groups were compared by independent t-test. The as- sociations between the corrected PCO changes and the improvements of clinical variables in all patients were analyzed by Pearson linear correlation. Results： One-year postoperatively, the Knee Society Scores, the Western Ontario and McMaster Uni- versities Osteoarthritis Index, non-weight-bearing active and passive range of knee flexion, flexion contracture, extensor lag, and their improvements had no statistical differences between the two groups （all p 〉 0.05）. The corrected PCO change was not significantly correlated with the improvement of any clinical variable （all p 〉 0.05）. Group A demonstrated greater flexion than group B during active weight bearing （p 〈 0.05）. Conclusions： Restoration of PCO plays an important role in the optimization of active knee flexion during weight-bearing conditions after posterior-stabilized TKA, while it has no benefit to non-weight-bearing knee flexion or any other clinical result.

Clinical Results of In Vitro Fertilization or Intracytoplasmic Sperm Injection Treatments in Women Aged 40 Years and above

Objective:The study was designed to estimate the live birth rate(LBR)and cumulative LBR(CLBR)in patients aged≥40 years undergoing in vitro fertilization or intracytoplasmic sperm injection treatments during their first and multiple ovarian stimulation cycle(s).Methods:A total of 697 advanced women underwent 1,293 treatment cycles,and 973 fresh embryo transfers were performed.The LBR and CLBR were analyzed with respect to an increase in the maternal age by every year.Results:A declining trend in LBR and CLBR of the first cycle was seen with an increase in maternal age.The LBR in women aged 40 years was significantly higher than that in women aged≥44 years(18.39%and 4.39%,respectively);the CLBR in women aged 40 years was also significantly higher than that in women aged 42,43,and≥44 years(22.40%,9.09%,9.09%,and 4.80%,respectively).However,there was no significant difference(P>0.05)in the rate of miscarriage among all groups.For those who underwent multiple cycles,the number of live-born babies decreased rapidly after three ovarian stimulation cycles;the LBR in patients aged 40 years was significantly higher than that in patients aged 42 years and≥44 years(15.24%,5.20%,and 4.49%,respectively),and the CLBR in patients aged 40-41 years was significantly higher than that in patients aged≥42 years.The CLBR in all groups gradually plateaued after three cycles;women aged 40-41 years achieved relatively reasonable CLBR,while the CLBR was<10%in women aged≥42 years.Conclusions:Women aged 40-41 years had a low but acceptable outcome in the first three ovarian stimulation cycles.The success rate quickly decreased,and for women aged≥42 years,the decision to continue after three ovarian stimulation cycles should be made cautiously.

Comparison of efficacy of two different silicone hydrogel bandage contact lenses after T-PRK

AIM:To compare the efficacy between two different silicone hydrogel bandage contact lenses after transepithelial photorefractive keratectomy(T-PRK).METHODS:In this randomized controlled trial,a total of 89 patients(178 eyes) who underwent T-PRK at the Qingdao Eye Hospital from October to December 2019 were selected.One random eye wore a Senofilcon A bandage contact lens after surgery,and the other eye a Balafilcon A bandage contact lens.Pain scores,uncorrected visual acuity(UCVA),spherical equivalent(SE),corneal epithelial healing status,epithelial thickness,bandage lenses deposits,lenses movement,and ocular surface conditions were measured and compared.RESULTS:There were no differences between the two groups in UCVA,SE,corneal epithelial healing status,corneal epithelial thickness,tear river heights and tear film rupture time at each follow-up visit.However,postoperative pain scores in the Senofilcon A group were significantly lower than those of the Balafilcon A group(F_(intergroups)=67.833,P<0.001;F_(time)=383.773,P<0.001;F_(interaction)=57.344,P<0.001).The duration of pain in eyes in the Senofilcon A group was shorter than that of the Balafilcon A group(t=-3.326,P=0.001).The surface deposition scores and movement scores of Senofilcon A bandage lenses on the first and fourth days after surgery were lower than those of Balafilcon A bandage lenses(Z=-5.385,-6.782,P<0.001;Z=-8.336,-8.906,P<0.001).CONCLUSION:Both Senofilcon A and Balafilcon A bandage lenses have good efficacy after T-PRK.Senofilcon A lenses are associated with less pain and more comfort compared to Balafilcon A.