The thermal field of radiofrequency probes at chondroplasty settings

Lee Kaplan, John M. Ernsthausen, James P. Bradley, Freddie H. Fu, Daniel L. Farkas

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Purpose: The purpose of this experimental study was to evaluate the thermal field produced with monopolar and bipolar radiofrequency probes located at increasing heights from the target treatment site. Type of Study: Experimental study. Methods: Two bipolar (ACD-50, ArthroCare, Sunnyvale, CA; VAPR-TC, Mitec Surgical Products, Westwood, MA) and one monopolar (Vulcan TAC-C II, Oratec Interventions, Menlo Park, CA) radiofrequency probes were placed in a screw-driven stage that allowed for 0.25-mm incremental height-position changes. ArthroCare ACD-50 was evaluated at settings 2 and 8. The Mitek VAPR-TC was evaluated at setting 65°C and V2-20 desiccation mode. The Oratec Vulcan TAC-C II system was evaluated at preset 2, power 15, set temperature 70°C. The RF-probes were evaluated at variable distances from 0 to 2 mm. A fluoroptic thermometer was used to evaluate the temperatures within a room temperature 0.9% normal saline arthroscopic simulation chamber. Results: The ACD-50 setting 2 at 0 mm was 89.1°C; at 0.5 mm, 71.2°C; and at 2 mm it was 37.3°C. The ACD-50 setting 8 at 0 mm was 87.3°C; at 0.5 mm, 42.5°C; and at 2 mm, 33.6°C. The Mitek VAPR-TC at 0 mm was 53.1°C; at 0.5 mm, 42.5°C; and at 2 mm, 26.8°C. The Oratec Vulcan at 0 mm was 73.9°C; at 0.5 mm, 60.3°C; and at 2 mm, 29.0°C. Each of these radiofrequency systems produced characteristic thermal fields at these settings. Conclusions: The temperature decreases with increasing distance characteristically for each radiofrequency probe. This is clinically important because altering radiofrequency probe location may cause large variations in articular cartilage thermal exposure.

Original languageEnglish
Pages (from-to)632-640
Number of pages9
JournalArthroscopy - Journal of Arthroscopic and Related Surgery
Volume19
Issue number6
DOIs
StatePublished - Jul 1 2003
Externally publishedYes

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Hot Temperature
Temperature
Thermometers
Desiccation
Articular Cartilage

Keywords

  • Cartilage
  • Radiofrequency
  • Temperature
  • Thermal chondroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery

Cite this

The thermal field of radiofrequency probes at chondroplasty settings. / Kaplan, Lee; Ernsthausen, John M.; Bradley, James P.; Fu, Freddie H.; Farkas, Daniel L.

In: Arthroscopy - Journal of Arthroscopic and Related Surgery, Vol. 19, No. 6, 01.07.2003, p. 632-640.

Research output: Contribution to journalArticle

Kaplan, Lee ; Ernsthausen, John M. ; Bradley, James P. ; Fu, Freddie H. ; Farkas, Daniel L. / The thermal field of radiofrequency probes at chondroplasty settings. In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 2003 ; Vol. 19, No. 6. pp. 632-640.
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abstract = "Purpose: The purpose of this experimental study was to evaluate the thermal field produced with monopolar and bipolar radiofrequency probes located at increasing heights from the target treatment site. Type of Study: Experimental study. Methods: Two bipolar (ACD-50, ArthroCare, Sunnyvale, CA; VAPR-TC, Mitec Surgical Products, Westwood, MA) and one monopolar (Vulcan TAC-C II, Oratec Interventions, Menlo Park, CA) radiofrequency probes were placed in a screw-driven stage that allowed for 0.25-mm incremental height-position changes. ArthroCare ACD-50 was evaluated at settings 2 and 8. The Mitek VAPR-TC was evaluated at setting 65°C and V2-20 desiccation mode. The Oratec Vulcan TAC-C II system was evaluated at preset 2, power 15, set temperature 70°C. The RF-probes were evaluated at variable distances from 0 to 2 mm. A fluoroptic thermometer was used to evaluate the temperatures within a room temperature 0.9{\%} normal saline arthroscopic simulation chamber. Results: The ACD-50 setting 2 at 0 mm was 89.1°C; at 0.5 mm, 71.2°C; and at 2 mm it was 37.3°C. The ACD-50 setting 8 at 0 mm was 87.3°C; at 0.5 mm, 42.5°C; and at 2 mm, 33.6°C. The Mitek VAPR-TC at 0 mm was 53.1°C; at 0.5 mm, 42.5°C; and at 2 mm, 26.8°C. The Oratec Vulcan at 0 mm was 73.9°C; at 0.5 mm, 60.3°C; and at 2 mm, 29.0°C. Each of these radiofrequency systems produced characteristic thermal fields at these settings. Conclusions: The temperature decreases with increasing distance characteristically for each radiofrequency probe. This is clinically important because altering radiofrequency probe location may cause large variations in articular cartilage thermal exposure.",
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AB - Purpose: The purpose of this experimental study was to evaluate the thermal field produced with monopolar and bipolar radiofrequency probes located at increasing heights from the target treatment site. Type of Study: Experimental study. Methods: Two bipolar (ACD-50, ArthroCare, Sunnyvale, CA; VAPR-TC, Mitec Surgical Products, Westwood, MA) and one monopolar (Vulcan TAC-C II, Oratec Interventions, Menlo Park, CA) radiofrequency probes were placed in a screw-driven stage that allowed for 0.25-mm incremental height-position changes. ArthroCare ACD-50 was evaluated at settings 2 and 8. The Mitek VAPR-TC was evaluated at setting 65°C and V2-20 desiccation mode. The Oratec Vulcan TAC-C II system was evaluated at preset 2, power 15, set temperature 70°C. The RF-probes were evaluated at variable distances from 0 to 2 mm. A fluoroptic thermometer was used to evaluate the temperatures within a room temperature 0.9% normal saline arthroscopic simulation chamber. Results: The ACD-50 setting 2 at 0 mm was 89.1°C; at 0.5 mm, 71.2°C; and at 2 mm it was 37.3°C. The ACD-50 setting 8 at 0 mm was 87.3°C; at 0.5 mm, 42.5°C; and at 2 mm, 33.6°C. The Mitek VAPR-TC at 0 mm was 53.1°C; at 0.5 mm, 42.5°C; and at 2 mm, 26.8°C. The Oratec Vulcan at 0 mm was 73.9°C; at 0.5 mm, 60.3°C; and at 2 mm, 29.0°C. Each of these radiofrequency systems produced characteristic thermal fields at these settings. Conclusions: The temperature decreases with increasing distance characteristically for each radiofrequency probe. This is clinically important because altering radiofrequency probe location may cause large variations in articular cartilage thermal exposure.

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