针对有剖腹产史的妇女，在铜T380A宫内节育器置入期间采用语言镇痛与标准技术进行疼痛控制的对比

实验性的：Verbal Analgesia

Participants randomized to the structured verbal analgesia group received a standardized supportive communication protocol throughout Copper T380A IUD insertion. The provider used a calm, low-volume voice, steady pitch, slow rate of speech, guided breathing, and continuous reassurance. The script was delivered at defined procedural steps, including before speculum insertion, during tenaculum application, during uterine sounding, during IUD insertion, and after completion of the procedure. The technical insertion procedure was otherwise identical to the control group.

行为的：Verbal Analgesia

Structured verbal analgesia consisted of a scripted supportive communication protocol delivered by the provider throughout IUD insertion. The protocol used calm tone, slow speech, guided breathing, reassurance, and positive procedural framing at predefined steps. No additional pharmacologic analgesic intervention was given beyond the standard pre-procedure ibuprofen used in both groups.

有源比较器：Control - Standard Technique

Participants randomized to the standardized neutral communication group received brief procedural statements only during Copper T380A IUD insertion, such as "I am now placing the speculum," "I am sounding the uterus," "The IUD is being inserted," and "The procedure is complete." The provider did not use additional reassurance, analgesic suggestion, guided breathing, or structured supportive phrasing. The technical insertion procedure was otherwise identical to the verbal analgesia group.

行为的：Providers will use a standardized neutral script with brief instructions only (e.g., "I am now placing the speculum," "I am sounding the uterus," "The IUD is being inserted," "The procedure is complet

Participants randomized to the standardized neutral communication group received brief procedural statements only during Copper T380A IUD insertion, such as "I am now placing the speculum," "I am sounding the uterus," "The IUD is being inserted," and "The procedure is complete." The provider did not use additional reassurance, analgesic suggestion, guided breathing, or structured supportive phrasing. The technical insertion procedure was otherwise identical to the verbal analgesia group.

Pain intensity at IUD release

Pain intensity measured using a 0-10 numerical rating scale, where 0 indicates no pain and 10 indicates the worst pain imaginable. Pain was recorded immediately after release of the Copper T380A IUD into the uterine cavity. In failed insertion cases, pain at the final attempted insertion step was used as the prespecified primary-outcome substitute.

患者满意度

将在就诊结束时使用0-10分数字评定量表进行测量，其中0分代表完全不满意，10分代表完全满意

Clinician-rated insertion difficulty

Insertion difficulty rated by the clinician using a 0-10 scale, where 0 indicates very easy insertion and 10 indicates the most difficult insertion.

Pain after speculum insertion

Pain intensity measured using a 0-10 numerical rating scale, where 0 indicates no pain and 10 indicates the worst pain imaginable.

Pain after tenaculum application

Pain intensity measured using a 0-10 numerical rating scale, where 0 indicates no pain and 10 indicates the worst pain imaginable.

Pain after uterine sounding

Pain intensity measured using a 0-10 numerical rating scale, where 0 indicates no pain and 10 indicates the worst pain imaginable.

Procedure time

Procedure time measured in minutes from speculum insertion to IUD placement and string trimming, or to termination of the final insertion attempt in failed cases.