Surgically used suture material polydioxanone:-
The core concept here is understanding the properties of polydioxanone. It's a monofilament, synthetic, absorbable suture. It's known for being slowly absorbed, which is important for certain surgical applications. The absorption time is around 180 days, which is longer than some other absorbable sutures like polyglycolic acid.
Now, the correct answer should state that polydioxanone is a synthetic absorbable suture with slow absorption. Let me confirm: yes, it's used in situations where prolonged support is needed, like in cardiovascular or orthopedic surgeries.
For the incorrect options, common mistakes might include confusing it with other materials. For example, if an option says it's non-absorbable, that's wrong. Another might mention a different absorption time, like 30 days, which is more typical of polyglycolic acid. Also, if an option states it's braided, that's incorrect because polydioxanone is monofilament.
Clinical pearl: Remember that polydioxanone (PDS) is used in high-tension areas and has a longer absorption period, making it suitable for tissues that take longer to heal. A mnemonic could be "PDS for Prolonged Support."
I need to structure the explanation with the sections as specified. Make sure each part is concise and covers the necessary points without being too verbose. Check for any possible errors in the reasoning. Alright, time to put it all together.
**Core Concept**
Polydioxanone (PDS) is a **synthetic absorbable monofilament suture** with **slow absorption** (180 days), making it suitable for tissues requiring prolonged tensile strength. It is hydrolyzed over time, not enzymatically degraded.
**Why the Correct Answer is Right**
Polydioxanone is a high-strength, monofilament polyester ether ester suture. Its slow absorption aligns with healing timelines in tissues like cardiovascular or orthopedic structures. It resists microbial colonization and causes minimal tissue reaction, reducing infection risk.
**Why Each Wrong Option is Incorrect**
**Option A:** Claims it is non-absorbable. Incorrect—PDS is absorbable via hydrolysis.
**Option B:** Suggests absorption within 30 days. Incorrect—PDS absorption lasts ~180 days.
**Option C:** States it is braided. Incorrect—PDS is monofilament, not braided.
**Clinical Pearl**
Remember: **"PDS for Prolonged Support"**. Use it in high-tension areas (e.g., hernia repairs) where 6-month support is needed. Avoid in tissues with rapid turnover (e.g., skin), as delayed absorption may cause foreign body reactions.
**Correct Answer: C. Synthetic absorbable suture with slow absorption**