TissueDB/Materials/Yarn

Yarn (thread, embroidery floss, twine) is synthetic or natural fiber used in surgical simulation to represent linear structures such as blood vessels, for knot-tying training.

Tissues

Tissue	Visual	Tactile	Simulator	Notes
Appendiceal Artery			Appendectomy Simulator, Acute Appendicitis Simulator, Open Appendectomy Simulator (Matthews)	Yarn represents the appendiceal artery as a ligation target.^[1]^[2]^[3]
Mesoappendix (red yarn within scrub-cap)			Open Appendectomy Simulator (Matthews)	Red yarn wrapped in scrub-cap material forms the mesoappendix — a scrub cap folded around a piece of red yarn is attached to the third finger of the glove to represent the mesoappendix and the appendiceal artery.^[1]

Alternatives

Alternative	Best For	Trade-offs
Silicone tubing	Realistic vessel wall thickness	Higher cost; more complex setup.
Non-sterile suture	Most realistic texture for suture manipulation training	Higher cost per session.
Felt	Fascial plane simulation

References

↑ ^1.0 ^1.1 Matthews J, Bhatia MB, Thomas C, Okoth P, Martinez CR, Levy JS, Stefanidis D, Hunter-Squires JL, Saruni SI (2022). "AMPATH surgical app: Low-cost simulator for the open appendectomy." Surgery 172(6):1656–1664. DOI: 10.1016/j.surg.2022.07.023. PMID: 36123174.
↑ ALL-SAFE Consortium. ALL-SAFE Acute Appendicitis Simulation Build Instructions. Global Surgical Training Challenge, 2022. Build instructions PDF and ALL-SAFE source page. Not indexed in PubMed; primary source linked directly.
↑ ASAP (AMPATH Surgical App) team. Instructions to Build your Model, ASAP Syllabus. Global Surgical Training Challenge. ASAP build instructions. Not indexed in PubMed; primary source linked directly.

Synonyms
Case-sensitive variations	Yarn, yarn, YARN, Yarns, yarn's
Trade names	Embroidery floss, crochet yarn, knitting yarn, worsted yarn, acrylic yarn, wool yarn, Cotton yarn, Caron yarn, Patons yarn
Regional terms	Fil (French), Filato (Italian), Hilo (Spanish), Garn (German), Garen (Dutch)
Forms	Yarn strand, yarn ball, yarn skein, yarn spool, embroidery thread, crochet yarn, knitting yarn, heavy yarn, light yarn, multi-ply yarn, single-ply yarn, twisted yarn, twisted strand
Medical / sterile variants	Sterile yarn, surgical suture yarn

Page data
Keywords	yarn, thread, vascular anastomosis, knot-tying, vessel simulation, surgical training
Authors	Ian-laurel, Arturo Pelayo
License	CC-BY-SA-4.0
Language	English (en)
Related	subpages, pages link here
Redirects	TissueDB/Materials/Yarns
Views	25 page views (analytics)
Created	December 30, 2025 by Ian-laurel
Last edit	November 1, 2026 by Arturo Pelayo
Cite as	Arturo Pelayo, Ian-laurel (2025–2026). "TissueDB/Materials/Yarn". Appropedia. Retrieved November 10, 2026.
API queries	basic, semantic, html, files, more

[matthews2022-1] 1.0 ^1.1 Matthews J, Bhatia MB, Thomas C, Okoth P, Martinez CR, Levy JS, Stefanidis D, Hunter-Squires JL, Saruni SI (2022). "AMPATH surgical app: Low-cost simulator for the open appendectomy." Surgery 172(6):1656–1664. DOI: 10.1016/j.surg.2022.07.023. PMID: 36123174.

[allsafe_appy-2] ALL-SAFE Consortium. ALL-SAFE Acute Appendicitis Simulation Build Instructions. Global Surgical Training Challenge, 2022. Build instructions PDF and ALL-SAFE source page. Not indexed in PubMed; primary source linked directly.

[asap_build-3] ASAP (AMPATH Surgical App) team. Instructions to Build your Model, ASAP Syllabus. Global Surgical Training Challenge. ASAP build instructions. Not indexed in PubMed; primary source linked directly.

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