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The Hysterosalpingogram (HSG) Experience And Tubal Spasm (HEAT) Study

The Hysterosalpingogram (HSG) Experience And Tubal Spasm (HEAT) Study: A Randomized Controlled Trial

Who can join

Ages 18 to 45 · Women

Inclusion Criteria:

1\. Women ages 18-45 undergoing tubal assessment via HSG.

Exclusion Criteria:

1. History of fibroids
2. History of pelvic inflammatory disease (PID or STD including gonorrhea, chlamydia, or trichomonas)
3. History of surgically diagnosed endometriosis or suspected endometriosis on ultrasound (indicated by visualization of likely endometrioma)
4. History of ectopic pregnancy or 3 or more biochemical pregnancies/pregnancy of unknown location
5. History of tubal or ovarian surgery
6. History of known Mullerian anomaly
7. History of pelvic surgery including appendectomy
8. Allergy to iodine-based contrast media
9. History of prior abnormal fallopian tubes on HSG
10. History of ultrasound with hydrosalpinx (unilateral or bilateral)

About the study

The hysterosalpingogram (HSG) is the gold standard of assessing fallopian tube patency and involves the placement of a transcervical catheter to allow for instillation of radio-opaque dye into the uterine cavity and fallopian tubes which are then imaged with abdominal x-ray. A common side effect of the instillation of dye is the uterine cramping, which is both uncomfortable for the patient as well as can cause iatrogenic proximal occlusion of the fallopian tubes. Proximal tubal obstruction is often not representative of true tubal obstruction but is rather an artifact of the test. Prior studies measuring the perceived pain and cramping during HSG have been conducted which have shown reduced pain scores and decreased uterine cramping when warmed contrast dye is used. The researchers propose that the use of warmed contrast media during HSG will be correlated with decreased pain scores and fewer cases of proximal tubal occlusion in women with otherwise normal uterine anatomy.

What is being tested

• Warmed HSG (drug)

Sponsor: University of Oklahoma · Participants: 240 · Started: 2026-09

Contact the study team

• Christy Zornes, MHR · Phone: (405) 271-8001

Official record on ClinicalTrials.gov — NCT07226310

Locations in the U.S.

Conditions

• Infertility

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.