| Retraction by surface ferromagnetisation of target tissues: preliminary studies on feasibility of magnetic retraction for endoscopic surgery. | |
| | |
MedLine Citation:
|
PMID: 18071794 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
BACKGROUND: Magnetic retraction has potential advantages over existing direct physical retraction means (e.g., forceps) in terms of providing complete atraumatic retraction, avoiding tumour cell exfoliation as well as offering the possibility of noncontact retraction. This paper describes a pilot study of surface magnetic retraction of the gastric mucosa to facilitate resection. METHODS: Fifteen porcine stomach specimens were used in this pilot study. The uniaxial tensile properties of retracted mucosa were initially studied using a tensiometer. Magnetic media of ferromagnetic microparticles (stainless steel 410) dispersed in cyanoacrylate liquid were prepared at four different concentrations, and a neodymium permanent magnet was used to magnetically retract the media. The media was finally surface-glued to the target mucosa for performing a simulated surgical procedure. RESULTS: The force measurement data show that the retraction forces increased as the concentrations of microparticles and magnetic media volumes increased. A magnetic media concentration of 2 g/mL was most suitable since it offered sufficient retraction force from a small volume of applied media, e.g., the observed magnetic forces exerted on 50 microL of media were 1.42 N by a 3-mm magnet and 3.75 N by a 6-mm magnet, respectively, both being more than sufficient for the mucosal retraction. The additional forces required for dissection with four alternative instruments, i.e., electrosurgery hook, snares, scalpel or scissors, were also measured, e.g., the total force required to retract up to 10 mm and resect the mucosa with snares was 0.36 +/- 0.17 N. In a simulated surgical procedure (resection of gastric mucosa with glued magnetic medium) retraction by the magnet allowed resection of the tented mucosa by an electrosurgical snare. CONCLUSION: Surface ferromagnetisation of target mucosal tissues could enable magnetic retraction for endoscopic surgery. |
| | |
Authors:
|
Zhigang Wang; Lijun Wang; Benjie Tang; Timothy Frank; Stuart Brown; Alfred Cuschieri |
Related Documents
:
|
16541224 - Muskuloskeletal mr imaging at 3.0 t: current status and future perspectives. 15543844 - The nobel prize in physiology or medicine in 2003 to paul c. lauterbur, peter mansfield... 12165354 - Electrical and thermal behavior of non-ferrous noble metal electrodes exposed to mri fi... 15556984 - Observation of magnetoreceptive behavior in a multicellular magnetotactic prokaryote in... 17213414 - Angiography of primary central nervous system angiitis of childhood: conventional angio... 9122724 - Lymphoscintigraphy, the sentinel node concept, and the intraoperative gamma probe in me... |
Publication Detail:
|
Type: Comparative Study; In Vitro; Journal Article Date: 2007-12-11 |
Journal Detail:
|
Title: Surgical endoscopy Volume: 22 ISSN: 1432-2218 ISO Abbreviation: Surg Endosc Publication Date: 2008 Aug |
Date Detail:
|
Created Date: 2008-07-16 Completed Date: 2008-09-18 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8806653 Medline TA: Surg Endosc Country: Germany |
Other Details:
|
Languages: eng Pagination: 1838-44 Citation Subset: IM |
Affiliation:
|
Institute for Medical Science and Technology, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Dissection / instrumentation Electrosurgery / instrumentation Endoscopy / methods* Feasibility Studies Gastric Mucosa Iron Compounds* Magnetics* Particle Size Pilot Projects Stainless Steel Surgical Instruments Swine |
| Chemical | |
Reg. No./Substance:
|
0/Iron Compounds; 12597-68-1/Stainless Steel |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Laparoscopic partial posterior (Toupet) fundoplication improves esophageal bolus propagation on scin...
Next Document: Laparoscopic appendectomy without clip or ligature. An experimental study.