An in vitro analysis of the size and shape of cryolesions for facet joint denervation.
Clin Neurol Neurosurg
; 153: 87-92, 2017 Feb.
Article
in En
| MEDLINE
| ID: mdl-28076822
ABSTRACT
OBJECTIVES:
Lumbar facet joint syndrome (LFJS) is the cause of lower back pain in 15-54% of the patients. Clinical studies of cryotherapy for LFJS have reported promising outcomes. However, few studies have focused on the technical aspects of cryoneurolysis for LFJS. The aim of the study was to determine the size and shape of cryolesions in vitro and to determine how they are affected by the duration of freezing, size of the cryoprobe and distance and angulation to an osseous boundary layer. MATERIALS ANDMETHODS:
Two different cryolesion generators were used. Cryolesions were generated in tempered physiologic NaCl solution in the vicinity of an osseous surface. The size of the cryoprobes, duration of freezing, distance to the bone surface and angulation of the probe were studied. Cryolesions were recorded with a video camera during their emergence. Images at distinct time points were analysed using digital image processing software.RESULTS:
The probe size, the system in use and the duration of the freezing cycle were the main determinants for the size of the cryolesion. The vicinity of the osseous boundary resulted in a modest increase in the size of the cryolesion. Angulation of the cryoprobe towards the osseous boundary is of minor importance for the size of the contact area to the nerve.CONCLUSION:
For cryoneurolysis of LFJS, duration of freezing, temperature and probe size are the main determinants of lesion size and thus the probability of success of the procedure. A tangential approach of the probe is not essential.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Low Back Pain
/
Cryosurgery
/
Zygapophyseal Joint
/
Denervation
Limits:
Humans
Language:
En
Journal:
Clin Neurol Neurosurg
Year:
2017
Document type:
Article