Objective:To investigate the clinical efficacy of electrical stimulation, biofeedback, and radiofrequency therapy in combination for the treatment of pelvic floor dysfunction.Methods:A total of 144 patients with pelvic floor dysfunction who received treatment in Lianyungang Maternal and Child Health Hospital from June 2020 to June 2022 were included in this prospective randomized controlled study. They were randomly assigned to undergo electrical stimulation combined with biofeedback (electrical stimulation group, n = 48), treatment with a novel radiofrequency technique (radiofrequency therapy group, n = 48), or electrical stimulation, biofeedback, and treatment with a novel radiofrequency technique (combined group, n = 48). Pelvic floor dysfunction, stress urinary incontinence, and pelvic floor myofascial pain were compared among the three groups. Pelvic organ prolapse quantification was compared among the three groups before and after treatment. Quality of life was evaluated. Results:The effective rates of treatment against pelvic floor dysfunction, stress urinary incontinence, and pelvic floor myofascial pain in the combined group were 95.83% (46/48), 97.92% (47/48), and 93.75% (45/48), respectively, which were significantly higher than 79.17% (38/48), 79.17% (38/48), 77.08% (37/48) in the radiofrequency group, and 75.00% (36/48), 77.08% (37/48), 72.92% (35/48) in the electrical stimulation group ( χ2 = 8.40, 9.77, 7.66, all P < 0.05). After treatment, the severity of pelvic organ prolapse in the combined group was significantly milder than that in the novel radiofrequency technique group and electrical stimulation group (both P < 0.05). The scores of the pelvic floor dysfunction questionnaire and urinary incontinence questionnaire in the combined group were significantly lower than those in the radiofrequency therapy group and the electrical stimulation group (both P < 0.05). Conclusion:Electrical stimulation, biofeedback, and radiofrequency therapy in combination can greatly strengthen the muscle strength of the pelvic floor, relieve urinary incontinence, reduce pelvic floor myofascial pain, and improve the quality of life of patients with pelvic floor dysfunction.

Objective:To observe the effects of epidural labor analgesia during latency period on factors related to labor process.Methods:A total of 120 single fetus cephalic presentation primiparas,aged from 22 to 35,were enrolled and randomly divided into group undergoing epidural labor analgesia during latency period (group Q),group undergoing epidural labor anal-gesia during active period (group H),and control group without epidural labor analgesia (group C).Duration of each labor pe-riod,pain score and amount of bleed were compared among the groups.Venous blood was collected for determination of inter-leukin (IL-6,IL-8)and tumor necrosis factor-α(TNF-α)levels before latent phase of labor or before starting infusion of oxyto-cin (time 1),2 h after delivery (time 2)and 24 h after delivery (time 3).Results:The second stage of labor in group Q or group H was longer than that in group C and the difference was statistically significant(P <0.05).However,there was no sta-tistical significance regarding other stages of labor among the three groups (P >0.05).There was no statistical significance re-garding IL-6,IL-8 and TNF-αlevels among the three groups at each of the 3 time points above (P >0.05).Conclusions:Epi-dural labor analgesia during latency period or active period could prolong the second stage of labor to different degree,but it had little effect on the entire labor process.Epidural labor analgesia had no significant effect on serum cytokines related to the birth process.Changing the time point of epidural labor analgesia from active period to latency period could improve maternal com-fort,so that it is worthy of clinical application.

In recent years, mass spectrometry has been widely used to study membrane protein structure and function. However, the application of mass spectrometry to study integral membrane protein is limited because there are many hydrophobic amino acids in the trans-membrane domain of integral membrane protein to cause low sequence coverage detected by LC-MS/MS. Therefore, we used vitamin K epoxide reductase (VKORC1), a human integral membrane protein, as a model to optimize the digestion conditions of chymotrypsin, and developed an in-gel digestion method of chymotrypsin to improve sequence coverage of membrane protein by mass spectrometry. By exploring the effects of calcium concentration, pH value and buffer system on the percentage of sequence coverage, number of total detected and types of unique peptide, and the size of unique peptide, sequence coverage and peptide diversity could be considered under condition of Tris-HCl buffer with 5-10 mmol/L calcium ion concentration and pH value 8.0-8.5. This method could make the sequence coverage of membrane protein to reach more than 80%. It could be widely used in the study of membrane protein structure and function, identification of interaction site between membrane proteins, and identification of binding site between membrane protein and small molecular drug.
Amino Acid Sequence ; Chromatography, Liquid ; Chymotrypsin/metabolism* ; Digestion ; Humans ; Membrane Proteins ; Tandem Mass Spectrometry ; Trypsin ; Vitamin K Epoxide Reductases