The Acute Effects of Radiofrequency Energy in Articular Cartilage: An In Vitro Study

2000 ◽  
Vol 16 (1) ◽  
pp. 2-5 ◽  
Author(s):  
Lee Kaplan ◽  
John W. Uribe ◽  
Harvey Sasken ◽  
Gregory Markarian
Keyword(s):  
Articular Cartilage ◽  
In Vitro Study ◽  
Vitro Study ◽  
Radiofrequency Energy ◽  
Acute Effects

Quantitative articular cartilage sub-surface defect assessment using optical coherence tomography: An in-vitro study

2019 ◽  
Vol 221 ◽  
pp. 125-134 ◽  
Author(s):  
Roman Michalik ◽  
Thorn Pauer ◽  
Nicolai Brill ◽  
Matthias Knobe ◽  
Markus Tingart ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Articular Cartilage ◽  
Surface Defect ◽  
In Vitro Study ◽  
Vitro Study ◽  
Optical Coherence ◽  
Defect Assessment

Damage to rabbit femoral articular cartilage following direct impacts of uniform stresses: an in vitro study

1999 ◽  
Vol 14 (8) ◽  
pp. 543-548 ◽  
Author(s):  
H. Zhang ◽  
M.S. Vrahas ◽  
R.V. Baratta ◽  
D.M. Rosler
Keyword(s):  
Articular Cartilage ◽  
In Vitro Study ◽  
Vitro Study

The effects of radiofrequency energy probe speed and application force on chondrocyte viability

2007 ◽  
Vol 20 (01) ◽  
pp. 34-37 ◽  
Author(s):  
M. L. Meyer ◽  
J. J Bogdanske ◽  
M. D. Markel ◽  
Y. Lu
Keyword(s):  
Articular Cartilage ◽  
In Vitro Study ◽  
Confocal Laser ◽  
Radiofrequency Energy ◽  
Chondrocyte Viability ◽  
Bovine Articular Cartilage ◽  
Cell Staining ◽  
Chondrocyte Death ◽  
Improper Use

Summary Objective: To determine the thermal effects of monopolar radiofrequency energy (mRFE) on bovine articular cartilage when it was moved at different speeds and using varying application forces. Methods: Thirty-six fresh osteochondral sections divided into two groups (18 sections/group) were used in this study. The first group was tested at three speed rates of mRFE probe (1 mm/sec, 5 mm/sec and 10 mm/sec) at a constant force (50 g) applied to the probe tip. In the second group, three application forces of the probe tip were tested (25 g, 50 g and 75 g) at a constant speed (5 mm/sec) (n=6/test). All tests were performed using a custom-built jig to control the mRFE (Vulcan EAS™) probe during a 20-mm pass on each section. After treatment, viability of osteochondral sections was determined by confocal laser microscopy (CLM) combined with vital cell staining. Results: There were not any significant differences in cartilage thickness of tested osteochondral sections among the different speeds or forces. During the mRFE probe treatments at different speeds, CLM demonstrated that probe application at the speed of 1 mm/ sec caused significantly greater chondrocyte death than at the speeds of 5 and 10 mm/sec, whereas there were no significant differences in chondrocyte death among the variable application forces (p>0.05). Discussion: This in vitro study demonstrated that RFE thermal penetration correlated most closely with probe application speed than application force for this mRFE probe. Clinical relevance: Improper use of mRFE may cause thermal injury on articular cartilage.

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