1
|
Uvarova L, Rednyk S, Dohnal P, Kassayová M, Saito S, Roučka Š, Plašil R, Johnsen R, Glosík J. Recombination of vibrationally cold N2+ ions with electrons. J Chem Phys 2023; 158:2887561. [PMID: 37125712 DOI: 10.1063/5.0149110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/17/2023] [Indexed: 05/02/2023] Open
Abstract
Recombination of vibrationally cold N2+ ions with electrons was studied in the temperature range of 140-250 K. A cryogenic stationary afterglow apparatus equipped with cavity ring-down spectrometer and microwave diagnostics was utilized to probe in situ the time evolutions of number densities of particular rotational and vibrational states of N2+ ions and of electrons. The obtained value of the recombination rate coefficient for the recombination of the vibrational ground state of N2+ with electrons is αv=0 = (2.95 ± 0.50) × 10-7(300/T)(0.28±0.07) cm3 s-1, while that for the first vibrationally excited state was inferred as αv=1 = (4 ± 4) × 10-8 cm3 s-1 at 250 K.
Collapse
Affiliation(s)
- L Uvarova
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - S Rednyk
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - P Dohnal
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - M Kassayová
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - S Saito
- Department of Physics, Rikkyo University, Tokyo, Japan
| | - Š Roučka
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - R Plašil
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - R Johnsen
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - J Glosík
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| |
Collapse
|
2
|
DeLozier JB, Holcomb JD. Helium Plasma Dermal Resurfacing With and Without Concurrent Aesthetic Surgery of the Face and Neck: A Retrospective Review. Aesthet Surg J Open Forum 2022; 4:ojac061. [PMID: 36046720 PMCID: PMC9422080 DOI: 10.1093/asjof/ojac061] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background Helium plasma dermal resurfacing (HPDR) is an emerging off-label use for an existing FDA-approved device. Objectives Retrospective evaluation of patient satisfaction and adverse events (AEs) following facial skin resurfacing with HPDR technology. Methods Single-site, retrospective review of 301 patient charts following HPDR treatment of the face. Patient satisfaction data were collected during review of medical records. AE data were analyzed to determine the effects of demographic, procedural, and posttreatment variables on the presence or absence of AEs. Results HPDR was performed concurrently with other facial/non-facial surgical procedures in 193 of 301 patients (64.1%) including over undermined facial skin in 58 patients (19.3%) during rhytidectomy. No serious AEs were observed. Nonserious AEs were noted, however, in 20 patients (7.3%) and included erythema/prolonged erythema, hyperpigmentation, milia, slow healing, and upper lip hypertrophic scar. Among the 288 patients returning for follow-up (mean 2 months postprocedure), satisfaction with HPDR treatment results was documented in 275 patients (95.5%); the remaining 13 patients' charts did not reference satisfaction or dissatisfaction, and no AEs were recorded for this patient subgroup. Conclusions This retrospective study supports the use and safety of HPDR technology for facial skin rejuvenation; no serious AEs and relatively few nonserious AEs were observed following either sole modality HPDR or HPDR with concurrent treatment of undermined skin tissue during rhytidectomy procedures. Patient satisfaction and observed results are comparable to full-field laser skin resurfacing treatments. Level of Evidence 3
Collapse
Affiliation(s)
- Joseph B DeLozier
- Corresponding Author: Dr Joseph B. DeLozier, 209 23rd Avenue N, Nashville, TN 37203, USA. E-mail:
| | | |
Collapse
|
3
|
Ahn GR, Park HJ, Koh YG, Shin SH, Kim YJ, Song MG, Lee JO, Hong HK, Lee KB, Kim BJ. Low-intensity cold atmospheric plasma reduces wrinkles on photoaged skin through hormetic induction of extracellular matrix protein expression in dermal fibroblasts. Lasers Surg Med 2022; 54:978-993. [PMID: 35662062 DOI: 10.1002/lsm.23559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 04/26/2022] [Accepted: 05/08/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND Recent evidence indicates that cold atmospheric plasma (CAP) can upregulate the production of extracellular matrix (ECM) proteins in dermal fibroblasts and enhance transdermal drug delivery when applied at a low intensity. OBJECTIVES The aim of this study was to evaluate the effect of low-intensity CAP (LICAP) on photoaging-induced wrinkles in an animal model and the expression profiles of ECM proteins in human dermal fibroblasts. METHODS Each group was subjected to photoaging induction and allocated to therapy (LICAP, topical polylactic acid (PLA), or both). The wrinkles were evaluated via visual inspection, quantitative analysis, and histology. The expression of collagen I/III and fibronectin was assessed using reverse transcription-quantitative polymerase chain reaction, western blot analysis, and immunofluorescence. The amount of aqueous reactive species produced by LICAP using helium and argon gas was also measured. RESULTS Wrinkles significantly decreased in all treatment groups compared to those in the untreated control. The differences remained significant for at least 4 weeks. Dermal collagen density increased following LICAP and PLA application. LICAP demonstrated a hormetic effect on ECM protein expression in human dermal fibroblasts. The production of reactive species increased, showing a biphasic pattern, with an initial linear phase and a slow saturation phase. The initial linearity was sustained for a longer time in the helium plasma (~60 s) than in the argon plasma (~15 s). CONCLUSION LICAP appears to be a novel treatment option for wrinkles on the photodamaged skin. This treatment effect seems to be related to its hormetic effect on dermal ECM production.
Collapse
Affiliation(s)
- Ga Ram Ahn
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - Hyung Joon Park
- Department of Interdisciplinary Bio/Micro System Technology, College of Engineering, Korea University, Seoul, Korea
| | - Young Gue Koh
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - Sun Hye Shin
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - Yu Jin Kim
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - Min Gyo Song
- School of Biomedical Engineering, Korea University, Seoul, Korea
| | - Jung Ok Lee
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| | - Hyuck Ki Hong
- Human IT Convergence System R&D Division, Korea Electronics Technology Institute, Seongnam-Si, Gyeonggi-do, Korea
| | - Kyu Back Lee
- Department of Interdisciplinary Bio/Micro System Technology, College of Engineering, Korea University, Seoul, Korea.,School of Biomedical Engineering, Korea University, Seoul, Korea
| | - Beom Joon Kim
- Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
| |
Collapse
|
4
|
Holcomb JD, Kalhan R, Pilcher B. Evaluation of skin tissue effects from treatment with a novel hand‐held plasma energy device. J Cosmet Dermatol 2022; 21:1998-2004. [DOI: 10.1111/jocd.14869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 02/07/2022] [Accepted: 02/16/2022] [Indexed: 11/30/2022]
Affiliation(s)
- J. David Holcomb
- Holcomb – Kreithen Plastic Surgery and Medspa 1 S. School Ave, Ste 800 Sarasota Florida 34237 USA
| | | | | |
Collapse
|
5
|
Holcomb JD, Doolabh V, Lin M, Zimmerman E. High energy, double pass helium plasma dermal resurfacing: A prospective, multicenter, single-arm clinical study. Lasers Surg Med 2022; 54:648-662. [PMID: 35170772 PMCID: PMC9305223 DOI: 10.1002/lsm.23524] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 01/13/2022] [Accepted: 01/30/2022] [Indexed: 12/22/2022]
Abstract
BACKGROUND A previous multi-center clinical study of low energy (20% power), single-pass helium plasma dermal resurfacing (HPDR) showed positive results but did not fully reveal the true potential of this novel technology. A second multi-center clinical study, reported herein, was therefore undertaken to evaluate efficacy and safety of high energy (40%), double pass HPDR for treatment of facial rhytids (ClinicalTrials.gov Identifier: NCT04185909). METHODS Fifty-five eligible subjects seeking improvement in facial rhytids were enrolled for study at one of four investigational sites. All subjects underwent full-face HPDR treatment. The forehead, nose, cheeks, and peri-oral treatment zones were treated at 40% power with two passes whereas the peri-orbital and jawline/mandibular zones were treated at 20% power (up to 40% for jawline/mandibular zone) and one or two passes. Photographic images of the face were captured using the VISIA-CR system. Three-month posttreatment Fitzpatrick Wrinkle and Elastosis Scale (FWS) scores were compared to baseline scores as determined by blinded independent photographic reviewers (IPRs) and study investigators. RESULTS Blinded IPRs and study investigators observed a ≥1-point FWS improvement in 100% of subjects with mean change in IPR FWS from baseline to the 90-day visit of -3.6 (±1.2). 96.4% of subjects indicated "improvement" in appearance at the 90-day visit utilizing the modified Global Aesthetic Improvement Scale. Evaluation of VISIA-CR data revealed statistically significant improvements in wrinkles, brown spots, and pore counts. Overall, 269 Adverse Events in 55 subjects were reported; most were mild-moderate in severity (99.3%), anticipated (86.2%), and of relatively short duration with most having resolved within 30 days (60.6%) of treatment. CONCLUSION Treatment of facial rhytids with high energy, double pass HPDR as detailed herein enables a marked improvement in FWS that parallels or surpasses competing technologies. VISIA-CR analysis demonstrates additional improvements in skin quality with statistically significant quantitative improvements in brown spots and enlarged pores as well as wrinkles. Effective rhytid effacement combines with high subject satisfaction and few unanticipated adverse events for a reasonable benefit-risk ratio.
Collapse
Affiliation(s)
- J David Holcomb
- Holcomb-Kreithen Plastic Surgery and MedSpa, Sarasota, Florida, USA
| | | | - Michael Lin
- Advanced Dermatology and Skin Cancer Institute, Sherman Oaks, California, USA
| | | |
Collapse
|
6
|
New Technologies in Skin Tightening. CURRENT OTORHINOLARYNGOLOGY REPORTS 2021. [DOI: 10.1007/s40136-021-00371-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
7
|
Holcomb JD. Helium plasma dermal resurfacing: VISIA CR assessment of facial spots, pores, and wrinkles-Preliminary findings. J Cosmet Dermatol 2021; 20:1668-1678. [PMID: 33773028 PMCID: PMC8251577 DOI: 10.1111/jocd.14106] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 03/01/2021] [Accepted: 03/19/2021] [Indexed: 12/18/2022]
Abstract
Objectives Effects of low energy, single‐pass helium plasma dermal resurfacing (PDR) treatment on brown spots, enlarged pores, and wrinkles—preliminary findings. Methods Twenty two subjects (64.6 ± 6.6 years) with Fitzpatrick Wrinkle and Elastosis Scale score (FWS) of ≤2 and seeking improvement of facial appearance were included in this subanalysis. All subjects received a single, one‐pass, full face, and low power helium PDR treatment. Standard digital images were collected using the VISIA‐CR (Canfield Scientific Inc.) at baseline and 3 months after treatment with images assessed for improvement in FWS and for improvements in brown spots, enlarged pores, and wrinkles by proprietary automated image processing algorithms. Results Nearly all subjects demonstrated ≥1‐point improvement in FWS and also reported improvement per modified Global Aesthetic Improvement Scale query. The numbers of brown spots and enlarged pores decreased by 45.1% and 28.3%, respectively. Stratification of brown spots data by presence or absence of post‐inflammatory hyperpigmentation revealed paradoxically conflicting data. The improvement detected in wrinkle area and mean wrinkle thickness was less pronounced with overall reductions of 13.4% and 4.8%, respectively. 37 Non‐serious adverse events (AEs) in 22 subjects were reported with most resolving within 14 days or less, and no serious AEs were observed. Conclusions While longer‐term follow‐up is needed, these early study results show that one single‐pass, low energy helium PDR treatment improves facial skin appearance both qualitatively and quantitatively. Studies evaluating higher energy levels and multiple treatment passes are ongoing.
Collapse
|
8
|
Ruff PG. Thermal effects of percutaneous application of plasma/radiofrequency energy on porcine dermis and fibroseptal network. J Cosmet Dermatol 2020; 20:2125-2131. [PMID: 33197275 PMCID: PMC8359425 DOI: 10.1111/jocd.13845] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 10/30/2020] [Indexed: 12/12/2022]
Abstract
Background Skin laxity is one of the defining characteristics of aging and can be the result of various factors including intrinsic aging, genetics, diet, stress, lifestyle, sun exposure, weight fluctuations, and smoking. Recent reports suggest the ability of subdermal energy application to reduce skin laxity. Thermal energy can be delivered using different devices including lasers, radiofrequency (RF) monopolar and bipolar devices, and plasma/RF devices. Plasma‐based energy platforms generate a plasma gas, allowing heat to be applied to the tissue. This study focused on the evaluation of thermal effect of plasma/RF compared to a monopolar RF device applied percutaneously to the subdermis and connective fibroseptal network in a porcine model. Methods The subdermal application of energy was conducted using a plasma/RF system and a monopolar RF system. Both low and high energy/temperature settings were evaluated in dynamic and stationary modes. Histomorphometry was used to determine the depth of thermal effect associated with each treatment setting. Results Both dermis and fibroseptal network tissue exhibited the presence of microscopically thermally treated zones. There were no significant differences in average and maximum depths of thermal effect between the different handpieces and electrosurgical systems used for all treatment settings. Conclusions No significant differences in the thermal effect between plasma/RF and monopolar RF systems were observed, suggesting that plasma/RF systems can be safely used for the percutaneous application of energy in the subcutaneous space.
Collapse
Affiliation(s)
- Paul G Ruff
- West End Plastic Surgery and MedStar Georgetown University, Washington, DC, USA
| |
Collapse
|
9
|
Madigan CD, O'Sullivan D, O'Neill L, Kavanagh DF. A comparison of two cold atmospheric helium plasma devices which utilise the same RF power generator. CLINICAL PLASMA MEDICINE 2020. [DOI: 10.1016/j.cpme.2020.100108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
10
|
Holcomb JD, Kelly M, Hamilton TK, DeLozier JB. A Prospective Study Evaluating the Use of Helium Plasma for Dermal Resurfacing. Lasers Surg Med 2020; 52:940-951. [PMID: 32350901 PMCID: PMC7754429 DOI: 10.1002/lsm.23257] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 04/15/2020] [Accepted: 04/20/2020] [Indexed: 11/09/2022]
Abstract
BACKGROUND AND OBJECTIVES A novel helium plasma device was evaluated for efficacy and safety for dermal resurfacing (ClinicalTrials.gov Identifier: NCT03286283). The helium plasma device delivers energy in a controlled, bimodal fashion that when compared with the nitrogen plasma predicate device in a porcine animal model demonstrated a more limited depth of thermal effect but a greater skin tissue contraction. STUDY DESIGN/MATERIALS AND METHODS Fifty-five eligible subjects seeking improvement in facial rhytids were enrolled for study at one of three investigational sites. Most subjects underwent full-face treatment. Power levels were limited to 20% at peri-oral and peri-orbital areas-a level that correlates to an energy density 40% lower than the highest setting on the predicate device. Three-month post-treatment Fitzpatrick Wrinkle and Elastosis Scale (FWS) scores were compared with baseline scores as determined by blinded independent photographic reviewers (IPRs) and study investigators. RESULTS Blinded IPRs observed a ≥1-point FWS improvement in 63.64% of subjects whereas study investigators noted a ≥1-point FWS improvement in 54 of 55 subjects (98.18%) of subjects. 90.9% of subjects indicated "improvement" in appearance utilizing the modified Global Aesthetic Improvement Scale. Subgroup analysis showed 1-point (±0.05) FWS improvement by IPRs and study investigators for Fitzpatrick Skin Types II and III, age≥62, two of three study sites, and post-treatment oral steroid use. Eighty Non-Serious Adverse Events in 39 subjects were reported, most of which resolved within 14 days or less. There were no Serious Adverse Events or Unanticipated Device Effects reported. CONCLUSION At the modest power level studied, a significant improvement from a single pass helium plasma dermal resurfacing treatment was observable in most subjects by IPRs and investigators, and no serious adverse events were reported. The discrepancy between IPR and study investigator FWS improvement may be explained in part by the limitations of assessing two-dimensional photographs versus live in-person evaluation of subjects. Studies evaluating higher energy levels and/or multiple treatment passes are ongoing. Lasers Surg. Med. © 2020 The Authors. Lasers in Surgery and Medicine published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- J David Holcomb
- Holcomb-Kreithen Plastic Surgery and MedSpa, 1 S. School Ave, Ste 800, Sarasota, Florida, 34237
| | - Michael Kelly
- Miami Plastic Surgery, 8940 N Kendall Dr Ste. 903-E, Miami, Florida, 33176
| | - Tiffani K Hamilton
- Department of Hamilton Dermatology, 11800 Atlantis Place, Alpharetta, Georgia, 30022
| | - Joseph B DeLozier
- DeLozier Cosmetic Surgery Center, 209 23rd Ave N, Nashville, Tennessee, 37203
| |
Collapse
|
11
|
|
12
|
Tanghetti E. LSM Dermatology Edition: Introduction 2020. Lasers Surg Med 2019; 52:5-6. [PMID: 31792996 DOI: 10.1002/lsm.23195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/18/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Emil Tanghetti
- Center for Dermatology and Laser Surgery, Dermatology, 5601 J Street, Sacramento, California, 95819
| |
Collapse
|