The effect of radiofrequency energy on the length and temperature properties of the glenohumeral joint capsule

Obrzut, SL; Hecht, Paul J.; Hayashi, Kei; Fanton, GS; Thabit, George; Markel,

doi:10.1016/s0749-8063(98)70007-6

Cited by 146 publications

(72 citation statements)

References 10 publications

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“…The extent of contraction is modified by the amount of cross-linking, age of scar, pH, temperature, load during heating, and water content. 14,15,20 Unloaded bovine chordae tendineae contract Ϸ65% when chordae are heated to 85°C; similar findings were observed in tendons from the ovine glenohumeral capsule. 20 In this study, epicardial temperature at the treatment site was maintained at 95°C, identical to the temperature in the sheep studies.…”

Section: Discussionsupporting

confidence: 62%

Left Ventricular Volume Reduction by Radiofrequency Heating of Chronic Myocardial Infarction in Patients With Congestive Heart Failure

et al. 2002

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Background-Myocardial infarct expansion and left ventricular (LV) remodeling are integral components in the evolution of chronic heart failure and predict morbidity and mortality. Radiofrequency (RF) heating and patch placement of chronic LV aneurysms caused a sustained reduction in LV infarct area and volume in an ovine infarct model. This study evaluated the effect of RF heating and epicardial patch as an adjunct to coronary artery bypass graft on LV volumes in patients with prior myocardial infarction, evidence of akinetic/dyskinetic scar, and LV ejection fraction Յ40%. Methods and Results-Ten patients (3 female; mean age, 64Ϯ11 years) scheduled for coronary artery bypass graft were enrolled (Canadian Cardiovascular Society angina class 2.1Ϯ1.1; New York Heart Association class 3.1Ϯ0.5).Intraoperative digital photography demonstrated an acute 39% reduction in infarct area (nϭ5; Pϭ0.01), and transesophageal ECGs demonstrated a 16% acute reduction in LV end-diastolic volumes (nϭ9; Pϭ0.002) after RF treatment. There were no intraoperative or procedure-related postoperative complications, and during an average follow-up of Ͼ180 days, there have been no safety issues. All patients had complete relief of their angina and improvement in exercise tolerance. Serial transthoracic ECGs over the 6 months of follow-up after RF treatment demonstrated persistent reductions in LV end-diastolic volume (29%; PϽ0.0001) and LV end-systolic volume (37%; PϽ0.0001) with improved ejection fraction (PϽ0.02). Conclusions-RF heating and patch placement in these 10 patients resulted in acute reduction in infarct area and ventricular volumes that were maintained 180 days after procedure. This technique may reduce the incidence of congestive heart failure and mortality in these patients and warrants investigation in larger clinical trials. (Circulation.

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Section: Discussionsupporting

confidence: 62%

Left Ventricular Volume Reduction by Radiofrequency Heating of Chronic Myocardial Infarction in Patients With Congestive Heart Failure

et al. 2002

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“…Each type of collagen has an optimal contraction temperature that does not cause thermal destruction of fibroblasts, but induces a restructuring effect in collagen fibers. The reported range of temperatures causing collagen shrinkage varies from 60 o C to 80 o C [5][6][7][8][9]. At this temperature tissue contraction occurs immediately after tissue reaches the threshold temperature.…”

Section: Tissue Tighteningmentioning

confidence: 99%

“…The shrinkage of tissue is dramatic and can reach tens of percents of the heated tissue volume. This type of contraction is well studied in cornea [5], joints [6], cartilage [7,8] and vascular tissue [9], but its application for the skin, sub-dermal and subcutaneous tissue tightening has not been as explored. Non-invasive RF and lasers have been used for skin tightening effects since the mid 1990's [10][11][12][13][14][15].…”

Section: Tissue Tighteningmentioning

confidence: 99%

Radio-Frequency Assisted Liposuction (RFAL)

Blugerman¹,

Paul²,

Schavelzon³

et al. 2011

Advanced Techniques in Liposuction and Fat Transfer

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“…It has been confirmed that, at this temperature, minimal ligament damage occurs while providing enough thermal energy to cause tissue shrinkage. 32 The short-term response to thermal energy in sheep glenohumeral joint capsule tissue is an inflammatory cell infiltration and fibroblast proliferation. I6 Tibone et a143 demonstrated a significant reduction in anterior and posterior translation after applying thermal energy to the anterior capsuloligamentous structures in cadaveric shoulders.…”

Section: Thermal Effect On Glenohumeral Joint Tissuementioning

confidence: 99%

Electrothermally-Assisted Capsulorrhaphy (ETAC): A New Surgical Method for Glenohumeral Instability and Its Rehabilitation considerations

Tyler

Calabrese

Parker³

et al. 2000

J Orthop Sports Phys Ther

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Knowledge of current surgical procedures and the effect they have on healing tissue is important when developing rehabilitation guidelines. Recently, clinicians have been asked to treat patients who have undergone Electrothemally-Assisted Capsulorrhaphy (ETAC) for shoulder instability. The ultimate tensile strength of the tightened capsule is unknown during various timeframes following surgery. The use of thermal energy to shrink the shoulder joint capsule initially causes weakness of the collagen ultrastructure. Rehabilitation following ETAC includes a period of relative immobilization, followed by controlled range of motion exercises. Exercises to strengthen shoulder muscles must be done in a manner that minimizes stress on the surgically treated capsule. This article provides a brief review of capsuloligamentous repair; describes the surgical procedure, its indications, contraindications, and the effect ETAC has on the healing tissue; and provides guidelines for rehabilitation following ETAC based on the evidence available and the authors clinical experience. ) Orthop Sports Phys Ther 2000;30:390-400.

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The effect of radiofrequency energy on the length and temperature properties of the glenohumeral joint capsule

Cited by 146 publications

References 10 publications

Left Ventricular Volume Reduction by Radiofrequency Heating of Chronic Myocardial Infarction in Patients With Congestive Heart Failure

Left Ventricular Volume Reduction by Radiofrequency Heating of Chronic Myocardial Infarction in Patients With Congestive Heart Failure

Radio-Frequency Assisted Liposuction (RFAL)

Electrothermally-Assisted Capsulorrhaphy (ETAC): A New Surgical Method for Glenohumeral Instability and Its Rehabilitation considerations

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