Question:
Which distension medium is used for hysteroscopy performed with bipolar cautery?
Which distension medium is used for hysteroscopy performed with bipolar cautery?
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Bipolar needs an ionic fluid, monopolar needs a non-ionic one.
Updated On: Jun 23, 2026
- Glycine
- Normal saline
- Carbon dioxide
- Dextran 70
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The Correct Option is B
Solution and Explanation
Step 1: The uterine cavity must be distended to give a panoramic view during hysteroscopy. The medium choice depends on the energy source used.
Step 2: Bipolar cautery works in an electrolyte-containing (ionic) medium, so normal saline is the appropriate distension fluid for bipolar hysteroscopic surgery.
Step 3: Monopolar cautery, in contrast, needs a non-conducting, electrolyte-free medium such as glycine, sorbitol or dextran 70, because saline would disperse the current. So glycine and dextran 70 are wrong for bipolar work.
Step 4: Carbon dioxide is a gas used only for diagnostic (not operative) hysteroscopy. Therefore the medium for bipolar cautery is normal saline.
Ref: Dutta Gynaecology, 6th ed, pp. 620, 624.
Step 2: Bipolar cautery works in an electrolyte-containing (ionic) medium, so normal saline is the appropriate distension fluid for bipolar hysteroscopic surgery.
Step 3: Monopolar cautery, in contrast, needs a non-conducting, electrolyte-free medium such as glycine, sorbitol or dextran 70, because saline would disperse the current. So glycine and dextran 70 are wrong for bipolar work.
Step 4: Carbon dioxide is a gas used only for diagnostic (not operative) hysteroscopy. Therefore the medium for bipolar cautery is normal saline.
Ref: Dutta Gynaecology, 6th ed, pp. 620, 624.
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