PMID- 29713832 OWN - NLM STAT- MEDLINE DCOM- 20190409 LR - 20190409 IS - 1248-9204 (Electronic) IS - 1248-9204 (Linking) VI - 22 IP - 4 DP - 2018 Aug TI - Assessment of myofascial medialization following posterior component separation via transversus abdominis muscle release in a cadaveric model. PG - 637-644 LID - 10.1007/s10029-018-1771-7 [doi] AB - PURPOSE: Posterior component separation (PCS) via the transversus abdominis release (TAR) procedure continues to gain popularity. However, neither the physiologic basis nor the extent of myofascial medialization after TAR is established. We aimed to assess both anterior and posterior rectus fascia (AF and PF) medialization following each step of the TAR procedure. METHODS: Ten fresh cadavers underwent PCS via TAR. Steps included midline laparotomy (MLL), retrorectus dissection (RRD), incision of the posterior rectus sheath (IPL), transversus abdominis muscle division (TAD), and retromuscular dissection (RMD). Medial advancement of AF and PF was measured following application of 2.5, 5.0 lb, and maximal tension to the fascial edge. Values are represented as mean advancement past midline in centimeters. RESULTS: MLL allowed advancement of 2.5, 3.7, and 4.9 cm. RRD provided advancement of 4.1, 5.9, and 7.6 cm for AF and 4.4, 6.2, and 7.5 cm for PF. IPL provided advancement of 4.2, 6.1, and 8.0 cm for AF and 4.6, 6.6, and 8.3 cm for PF. TAD provided advancement of 4.5, 6.6, and 8.6 cm for AF and 5.3, 7.5, and 9.5 cm for PF. RMD provided advancement of 5.5, 7.9, and 9.9 cm for AF and 6.9, 9.6, and 11.2 cm for PF. Overall, the complete TAR procedure provided AF advancement of 102% and PF advancement of 129%, over baseline. CONCLUSIONS: The TAR procedure provides for substantial medial advancement of both anterior and posterior myofascial components of the abdominal wall. Retromuscular dissection deep to the divided transversus abdominis muscle appears to be the key step of the procedure, allowing for effective reconstruction of very wide ( approximately 20 cm) defects. FAU - Majumder, A AU - Majumder A AD - Department of Surgery, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA. arnab.uhhs@gmail.com. FAU - Miller, H J AU - Miller HJ AD - Department of Surgery, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA. FAU - Del Campo, L M AU - Del Campo LM AD - Department of Surgery, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA. FAU - Soltanian, H AU - Soltanian H AD - Department of Surgery, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA. FAU - Novitsky, Y W AU - Novitsky YW AD - Department of Surgery, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA. LA - eng PT - Journal Article DEP - 20180430 PL - France TA - Hernia JT - Hernia : the journal of hernias and abdominal wall surgery JID - 9715168 SB - IM CIN - Am J Surg. 2020 Apr;219(4):728-729. PMID: 31153583 MH - Abdominal Muscles/*surgery MH - Abdominal Wall/surgery MH - Cadaver MH - Dissection/methods MH - Fascia MH - Female MH - Hernia, Ventral/*surgery MH - Herniorrhaphy/*methods MH - Humans MH - Laparotomy MH - Male OTO - NOTNLM OT - Cadaveric OT - Myofascial advancement OT - Posterior component separation OT - TAR OT - Transversus abdominis release OT - Ventral hernia repair EDAT- 2018/05/02 06:00 MHDA- 2019/04/10 06:00 CRDT- 2018/05/02 06:00 PHST- 2017/12/10 00:00 [received] PHST- 2018/04/17 00:00 [accepted] PHST- 2018/05/02 06:00 [pubmed] PHST- 2019/04/10 06:00 [medline] PHST- 2018/05/02 06:00 [entrez] AID - 10.1007/s10029-018-1771-7 [pii] AID - 10.1007/s10029-018-1771-7 [doi] PST - ppublish SO - Hernia. 2018 Aug;22(4):637-644. doi: 10.1007/s10029-018-1771-7. Epub 2018 Apr 30.