The effect of radiofrequency energy on the ultrastructure of joint capsular collagen

Lopez, Mandi J.; Hayashi, Kei; Fanton, GS; Thabit, George; Markel,

doi:10.1016/s0749-8063(98)70078-7

Cited by 166 publications

(81 citation statements)

References 25 publications

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“…This uncoiling of collagen fibers and transition from a crystalline state to a random coil is responsible for collagen shortening, and transmission electron microscopy of collagenous tissues treated with RF ablation show collagen fibrils that increase in average diameter with increasing RF power. 30 Additionally, aligned collagen fibers fuse together in the orthogonal directions after treatment with RF ablation, [29][30] leading to modest changes seen in the radial direction here (Fig. 9D).…”

Section: Thermally-related Collagen Contracturementioning

confidence: 82%

Development of a Simultaneous Cryo-Anchoring and Radiofrequency Ablation Catheter for Percutaneous Treatment of Mitral Valve Prolapse

Boronyak

Merryman

2012

Ann Biomed Eng

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Section: Thermally-related Collagen Contracturementioning

confidence: 82%

Development of a Simultaneous Cryo-Anchoring and Radiofrequency Ablation Catheter for Percutaneous Treatment of Mitral Valve Prolapse

Boronyak

Merryman

2012

Ann Biomed Eng

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“…With Coblation 1 (ArthroCare Corporation) technology, radiofrequency energy is used to excite the electrolytes in a conductive medium such as saline solution to create a precisely focused plasma whose energized particles have sufficient energy to break the molecular bond in tissue, causing tissue to dissolve at relatively low temperature (typically 40°C to 70°C). Numerous Coblation 1 -based devices are in fact designed to seal bleeding vessels [6,10,15]. In addition, the radiofrequency wand has the capability of cutting in all directions with low resistance and therefore allows fine manipulation in narrow spaces [8].…”

Section: Discussionmentioning

confidence: 99%

Arthroscopic Gluteal Muscle Contracture Release With Radiofrequency Energy

Liu¹,

Wang²,

Xue³

et al. 2009

Clinical Orthopaedics &Amp; Related Research

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Gluteal muscle contracture is common after repeated intramuscular injections and sometimes is sufficiently debilitating to require open surgery. We asked whether arthroscopic release of gluteal muscle contracture using radiofrequency energy would decrease complications with clinically acceptable results. We retrospectively reviewed 108 patients with bilateral gluteal muscle contractures (57 males, 51 females; mean age, 23.7 years). We used inferior, anterosuperior, and posterosuperior portals. With the patient lying laterally, we developed and enlarged a potential space between the gluteal muscle group and the subcutaneous fat using blunt dissection. Under arthroscopic guidance through the inferior portal, we débrided and removed fatty tissue overlying the contractile band of the gluteal muscle group using a motorized shaver introduced through the superior portal. Radiofrequency then was introduced through the superior portal to gradually excise the contracted bands from superior to inferior. Finally, hemostasis was ensured using radiofrequency. Patients were followed a minimum of 7 months (mean, 17.4 months; range, 7-42 months). At last followup, the adduction and flexion ranges of the hip were 45.3°± 8.7°a nd 110.2°± 11.9°, compared with 10.4°± 7.2°and 44.8°± 14.1°before surgery. No hip abductor contracture recurred and no patient had residual hip pain or gluteal muscle wasting. We found gluteal muscle contracture could be released effectively with radiofrequency energy.

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“…More recently, the use of non-ablative, radio-frequency (RF) energy has been used to treat laxity in the anterior cruciate ligament, joint capsular region in the human shoulder and the lower face and neck [4][5][6][7]. RF devices have been used in thermal delivery systems to provide the beneficial effects of heat while avoiding some of the downfalls of more standard lasers [8].…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural evaluation of multiple pass low energy versus single pass high energy radio‐frequency treatment

et al. 2006

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Background and Objective:: The radio-frequency (RF) device is a system capable of volumetric heating of the mid to deep dermis and selective heating of the fibrous septa strands and fascia layer. Clinically, these effects promote dermal collagen production, and tightening of these deep subcutaneous structures. A new technique of using multiple low energy passes has been described which results in lower patient discomfort and fewer side effects. This technique has also been anecdotally described as giving more reproducible and reliable clinical results of tissue tightening and contouring. This study will compare ultrastructural changes in collagen between a single pass high energy versus up to five passes of a multiple pass lower energy treatment. Study Design/Materials and Methods: Three subjects were consented and treated in the preauricular region with the RF device using single or multiple passes (three or five) in the same 1.5 cm 2 treatment area with a slight delay between passes to allow tissue cooling. Biopsies from each treatment region and a control biopsy were taken immediately, 24 hours or 6 months post treatment for electron microscopic examination of the 0-1 mm and 1-2 mm levels. Sections of tissue 1 mmÂ1 mmÂ80 nm were examined with an RCA EMU-4 Transmission Electron Microscope. Twenty sections from 6 blocks from each 1 mm depth were examined by 2 blinded observers. The morphology and degree of collagen change in relation to area examined was compared to the control tissue, and estimated using a quantitative scale. Results: Ultrastructural examination of tissue showed that an increased amount of collagen fibril changes with increasing passes at energies of 97 J (three passes) and 122 J (five passes), respectively. The changes seen after five multiple passes were similar to those detected after much more painful single pass high-energy treatments.Conclusions: This ultrastructural study shows changes in collagen fibril morphology with an increased effect demonstrated at greater depths of the skin with multiple lowfluence passes and at lesser depths with single pass higher fluence settings. Findings suggest that similar collagen fibril alteration can occur with multiple pass low-energy treatments and single pulse high-energy treatments. The lower fluence multiple pass approach is associated with less patient discomfort, less side effects, and more consistent clinical results. Lasers Surg. Med. 38:150-154, 2006.

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The effect of radiofrequency energy on the ultrastructure of joint capsular collagen

Cited by 166 publications

References 25 publications

Development of a Simultaneous Cryo-Anchoring and Radiofrequency Ablation Catheter for Percutaneous Treatment of Mitral Valve Prolapse

Development of a Simultaneous Cryo-Anchoring and Radiofrequency Ablation Catheter for Percutaneous Treatment of Mitral Valve Prolapse

Arthroscopic Gluteal Muscle Contracture Release With Radiofrequency Energy

Ultrastructural evaluation of multiple pass low energy versus single pass high energy radio‐frequency treatment

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