Assessment of efficacy and safety of a fractionated bipolar radiofrequency device for the treatment of lower face wrinkles and laxity

Abstract Aims Despite all this technical progress, VT recurrence after unipolar ablation remains relatively high (12–47%). Bipolar ablation has been proposed as an appealing solution, which may overcome boundaries associated with unipolar ablation settings. Therefore, we have proposed an animal study to compare bipolar (BPA) vs sequential unipolar ablation (UPA) using a contact-force sensing technology on both catheters. Methods 20 large white female pigs (6 months-old, 60–70kg) underwent multiple RF ablations (30W, 60s, 30ml/min irrigation) on ventricular myocardium, from epicardial and endocardial sides. After the procedure, the animal underwent euthanasia, cardioplegia and organ excision. The hearts were fixed and underwent high-resolution cardiac MRI. Each lesion was characterized primarily in terms of volume, depth, width and transmurality. Results We evaluated 35 lesions across the intraventricular septum. No difference in volume, linear dimensions and impedance drop was observed in this area, between the two ablation settings. However, for the generation of unipolar lesions, twice the ablation time was needed. Transmurality of the lesions shows a trend in favor of BPA. We then analyzed 73 lesions from the endocardial side and 34 from the epicardial one of the ventricular free walls. Lesion transmurality was found remarkably improved in BPA (p=0.030, OR 23.73 [4.71,11.96]). Ventricular BPA lesions were significantly deeper on the epicardial side (p<0.0001) Conclusion BPA is more likely to create transmural lesions in the ventricle, when compared to UPA. Half the time is needed for the creation of comparably deep and large lesions. BPA is specifically more effective in creating epicardial lesions.

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Evaluation of the efficacy and safety of different dilutions of Mesobotox in Mid and / or lower face rejuvenation: Interventional study

QJM ◽

10.1093/qjmed/hcab093.031 ◽

2021 ◽

Vol 114 (Supplement_1) ◽

Author(s):

Nesma Saber Abd El Rahman ◽

Samar Abdallah Salem ◽

Ahmed Abd Elfattah Afify ◽

Wael Mohamed Seoudy

Keyword(s):

Treatment Response ◽

Sun Exposure ◽

Skin Aging ◽

Efficacy And Safety ◽

Skin Texture ◽

Lower Face ◽

The Past ◽

Pigmented Lesions ◽

Aged Skin ◽

Poor Nutrition

Abstract As life expectancy has prolonged nowadays, interest has increased to change patterns of life, which include improving the consequences of skin ageing through slowing the ageing process. There are two main processes of skin ageing either intrinsic or extrinsic. Intrinsic ageing reflects genetic background in which skin appears thin with exaggerated expression lines. However, extrinsic ageing is caused by external factors such as smoking, excessive use of alcohol, poor nutrition and sun exposure. Extrinsically aged skin appears predominantly not only by wrinkles, but also by pigmented lesions such as freckles, lentigines and patchy hyperpigmentation, and depigmented lesions such as guttate hypomelanosis. Epidermal and dermal atrophy, rough skin texture, flushing, erythema, telangiectasias, dilated pores and loss of tone and elasticity are also other signs of skin aging. Over the past few years, the use of Mesobotox has broadened and it is now commonly used as rejuvenation procedure with different dilutions. Our work aimed to compare between three commonly used dilutions of Mesobotox regarding its efficacy and safety, as this comparison was not done previously. Aim of the study The aim of this work is to evaluate and compare between different dilutions of Mesobotox in mid and / or lower facial rejuvenation. Patients and methods We included 30 patients complaining of facial wrinkles. Patients were divided into three equal groups to study three different dilutions of Mesobotox 1:5, 1:7 and 1:10. Assessment of treatment response was done using 3D Antera camera. Results Assessment of treatment response using Antera camera in 1:5 dilution revealed statistically significant improvement in all the parameters (periorbital and midface) with more evident improvement after 1 month of treatment compared to after 6 months of treatment. With 1:7 dilution and 1:10 dilution, response revealed statistically significant improvement in most of the parameters (periorbital and midface) with more evident improvement after 1 month of treatment compared to after 6 months of treatment.

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