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Malek-Khatabi A, Rad-Malekshahi M, Shafiei M, Sharifi F, Motasadizadeh H, Ebrahiminejad V, Rad-Malekshahi M, Akbarijavar H, Faraji Rad Z. Botulinum toxin A dissolving microneedles for hyperhidrosis treatment: design, formulation and in vivo evaluation. Biomater Sci 2023; 11:7784-7804. [PMID: 37905676 DOI: 10.1039/d3bm01301d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Multiple periodic injections of botulinum toxin A (BTX-A) are the standard treatment of hyperhidrosis which causes excessive sweating. However, BTX-A injections can create problems, including incorrect and painful injections, the risk of drug entry into the bloodstream, the need for medical expertise, and waste disposal problems. New drug delivery systems can substantially reduce these problems. Transdermal delivery is an effective alternative to conventional BTX-A injections. However, BTX-A's large molecular size and susceptibility to degradation complicate transdermal delivery. Dissolving microneedle patches (DMNPs) encapsulated with BTX-A (BTX-A/DMNPs) are a promising solution that can penetrate the dermis painlessly and provide localized translocation of BTX-A. In this study, using high-precision 3D laser lithography and subsequent molding, DMNPs were prepared based on a combination of biocompatible polyvinylpyrrolidone and hyaluronic acid polymers to deliver BTX-A with ultra-sharp needle tips of 1.5 ± 0.5 µm. Mechanical, morphological and histological assessments of the prepared DMNPs were performed to optimize their physicochemical properties. Furthermore, the BTX-A release and diffusion kinetics across the skin layers were investigated. A COMSOL simulation was conducted to study the diffusion process. The primary stability analysis reported significant stability for three months. Finally, the functionality of the BTX-A/DMNPs for the suppression of sweat glands was confirmed on the hyperhidrosis mouse footpad, which drastically reduced sweat gland activity. The results demonstrate that these engineered DMNPs can be an effective, painless, inexpensive alternative to hypodermic injections when treating hyperhidrosis.
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Affiliation(s)
- Atefeh Malek-Khatabi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mazda Rad-Malekshahi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Morvarid Shafiei
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran
| | - Fatemeh Sharifi
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
| | - Hamidreza Motasadizadeh
- Department of Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Vahid Ebrahiminejad
- School of Engineering, University of Southern Queensland, Springfield, Queensland, 4300, Australia.
| | | | - Hamid Akbarijavar
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Faraji Rad
- School of Engineering, University of Southern Queensland, Springfield, Queensland, 4300, Australia.
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Choi JB, Seol DW, Do HS, Yang HY, Kim TM, Byun YG, Park JM, Choi J, Hong SP, Chung WS, Suh JM, Koh GY, Lee BH, Wee G, Han YM. Fasudil alleviates the vascular endothelial dysfunction and several phenotypes of Fabry disease. Mol Ther 2023; 31:1002-1016. [PMID: 36755495 PMCID: PMC10124081 DOI: 10.1016/j.ymthe.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/04/2023] [Accepted: 02/03/2023] [Indexed: 02/10/2023] Open
Abstract
Fabry disease (FD), a lysosomal storage disorder, is caused by defective α-galactosidase (GLA) activity, which results in the accumulation of globotriaosylceramide (Gb3) in endothelial cells and leads to life-threatening complications such as left ventricular hypertrophy (LVH), renal failure, and stroke. Enzyme replacement therapy (ERT) results in Gb3 clearance; however, because of a short half-life in the body and the high immunogenicity of FD patients, ERT has a limited therapeutic effect, particularly in patients with late-onset disease or progressive complications. Because vascular endothelial cells (VECs) derived from FD-induced pluripotent stem cells display increased thrombospondin-1 (TSP1) expression and enhanced SMAD2 signaling, we screened for chemical compounds that could downregulate TSP1 and SMAD2 signaling. Fasudil reduced the levels of p-SMAD2 and TSP1 in FD-VECs and increased the expression of angiogenic factors. Furthermore, fasudil downregulated the endothelial-to-mesenchymal transition (EndMT) and mitochondrial function of FD-VECs. Oral administration of fasudil to FD mice alleviated several FD phenotypes, including LVH, renal fibrosis, anhidrosis, and heat insensitivity. Our findings demonstrate that fasudil is a novel candidate for FD therapy.
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Affiliation(s)
- Jong Bin Choi
- Department of Biological Sciences, KAIST, Daejeon 34141, Republic of Korea
| | - Dong-Won Seol
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Republic of Korea
| | - Hyo-Sang Do
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - Hee-Young Yang
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Republic of Korea
| | - Taek-Min Kim
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | | | - Jae-Min Park
- Department of Biological Sciences, KAIST, Daejeon 34141, Republic of Korea; Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Republic of Korea
| | - Jinhyuk Choi
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Seon Pyo Hong
- Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Won-Suk Chung
- Department of Biological Sciences, KAIST, Daejeon 34141, Republic of Korea
| | - Jae Myoung Suh
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Gou Young Koh
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea; Center for Vascular Research, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Beom Hee Lee
- Department of Pediatrics, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - Gabbine Wee
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Republic of Korea.
| | - Yong-Mahn Han
- Department of Biological Sciences, KAIST, Daejeon 34141, Republic of Korea; Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Republic of Korea.
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Grosheva M, Guntinas-Lichius O, Deitmer T, Klußmann JP. Bedeutung der Wunddrainage und der stationären Behandlung bei Operationen von Speicheldrüsentumoren. Laryngorhinootologie 2022; 101:281-283. [PMID: 35272352 DOI: 10.1055/a-1780-0406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Maria Grosheva
- HNO-Uniklinik Köln, Universität zu Köln, Medizinische Fakultät
| | | | - Thomas Deitmer
- Deutsche Gesellschaft für Hals-Nasen-Ohrenheilkunde, Kopf- und Hals-Chirurgie e. V
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Song K, Oh C, Won H, Koo BS, Kim DM, Yeo M, Choi Y, Chang JW. Effectiveness of the Fibrinogen-Thrombin-Impregnated Collagen Patch in the Prevention of Postoperative Complications after Parotidectomy: A Single-Blinded, Randomized Controlled Study. J Clin Med 2022; 11:746. [PMID: 35160200 PMCID: PMC8836986 DOI: 10.3390/jcm11030746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 01/28/2022] [Accepted: 01/28/2022] [Indexed: 12/10/2022] Open
Abstract
We investigated whether a fibrinogen-thrombin collagen sponge patch reduces postoperative complications of parotid gland surgery. This single-blinded, randomized controlled study included 165 patients who underwent parotid surgery for benign tumors (2018–2019) at a tertiary center. Primary outcomes were postoperative drain amount, days until drain removal, and discharge. Patients were scheduled for follow-up at 1 and 4 weeks, and 3 months after surgery. Complications including surgical site infection, pain, seroma, sialocele, salivary fistula, facial nerve palsy, Frey’s syndrome with subjective symptoms, and facial asymmetry were analyzed. After identifying confounding variables, multivariate approaches were used. Histologic analysis was performed in a mouse model of salivary gland surgery. In total, 162 patients (77, fibrinogen-thrombin collagen patch group; 85, controls) were included, with no significant between-group differences other than resected tissue. Among postoperative total drain amount and days until drain removal and discharge, the only postoperative total drain was significantly lower in the patch group than in the control group in the adjusted model. Additionally, although validation through robust trials with longer follow-up is needed, we found the potential benefit of the fibrinogen patch on Frey’s syndrome and facial asymmetry. In conclusion, fibrinogen-thrombin-impregnated collagen patches in parotidectomy can reduce postoperative drainage and improve outcomes.
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Wang W, Cai Y, Oranges CM, Kalbermatten DF, Schaefer DJ, Yang C, Li W. Sternocleidomastoid Muscle Transfer for Treatment of Longstanding Facial Paralysis: Long-term Outcomes and Complications. In Vivo 2022; 36:501-509. [PMID: 34972755 DOI: 10.21873/invivo.12731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/20/2021] [Accepted: 11/26/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM The use of sternocleidomastoid muscle (SCM) flap for facial reanimation was established in the 1980s by the senior author of this paper. We aimed to analyze long-term outcome and complications of this procedure. PATIENTS AND METHODS We conducted a retrospective chart review of all patients undergoing SCM reanimation for longstanding facial palsy between January 2009 and December 2015. Patients with follow-up longer than 12 months (range=12-96) were included in the study. Facial muscle function was evaluated before and at each follow-up after the surgery with the House-Brackmann (HB) scale-facial nerve grading system and Facegram analysis. Donor site morbidity and overall complication rates were documented and analyzed. RESULTS Forty-two patients aged 18-66 years (mean age=37) with a mean duration of facial palsy of 5 years (range=2-48) met the inclusion criteria. The HB score 2 years after surgery improved significantly (p<0.05) in comparison to the pre-operative condition (3.6 vs. 4.7). Twelve months after surgery, oral commissure excursion improved by mean 8.95 mm. No flap necrosis occurred, nor compromise of neck and shoulder function despite an obvious contour defect in the SCM donor site. None of the patients presented head posture or movement issues. CONCLUSION The SCM flap transfer is a reliable and effective procedure to achieve moderate improvement of the oral commissure excursion using a local method with moderate donor site morbidity. It can be regarded as a valuable option for dynamic facial reanimation in case of longstanding facial palsy.
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Affiliation(s)
- Wenjin Wang
- Plastic and Reconstructive Surgery Department, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Yizuo Cai
- Plastic and Reconstructive Surgery Department, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China
| | - Carlo M Oranges
- Department of Plastic, Reconstructive and Aesthetic Surgery, Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Daniel F Kalbermatten
- Department of Plastic, Reconstructive and Aesthetic Surgery, Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Dirk J Schaefer
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, Basel University Hospital, University of Basel, Basel, Switzerland
| | - Chuan Yang
- Plastic and Reconstructive Surgery Department, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China;
| | - Wei Li
- Plastic and Reconstructive Surgery Department, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China;
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Jain A, Rai A. Meta-Analysis to Evaluate the Efficacy of Sternocleidomastoid Muscle Flap as a Reconstruction Modality in Prevention of Frey's Syndrome Following Parotidectomy. J Maxillofac Oral Surg 2021; 20:310-318. [PMID: 33927502 PMCID: PMC8041995 DOI: 10.1007/s12663-020-01380-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 04/27/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND One of the commonest complications following parotidectomy is Frey's syndrome (FS). The use of sternocleidomastoid muscle (SCM) flap to prevent FS is controversial. Hence, this study has been designed to compare the effect of SCM flap with no reconstruction in prevention of FS following parotidectomy. METHODOLOGY An exhaustive literature search was conducted in July 2019. Studies focusing on sternocleidomastoid flap following parotidectomy were included in the meta-analysis. A random effects model was used to generate pooled estimates. Odds ratio with a 95% confidence interval was calculated for subjective symptoms and objective test. RESULTS A total of 125 studies were identified, out of which 17 studies were recruited in the meta-analysis. Sixteen studies were analyzed for the subjective symptoms, and ten were analyzed for the objective signs. There was no statistically significant difference in the occurrence of FS with the use of SCM flap on objective analysis. However, the subjective analysis showed a statistically significant reduction in FS following reconstruction with SCM flap after parotidectomy. CONCLUSION The present meta-analysis suggests that the use of SCM flap following parotidectomy has no effect in reducing the incidence of Frey's syndrome.
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Affiliation(s)
- Anuj Jain
- Department of Trauma and Emergency Medicine, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh India
| | - Anshul Rai
- Department of Dentistry, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh India
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Mashrah MA, Aldhohrah T, Abdelrehem A, Koraitim M, Wang L. What is the best method for prevention of postparotidectomy Frey syndrome? Network meta-analysis. Head Neck 2021; 43:1345-1358. [PMID: 33439485 DOI: 10.1002/hed.26597] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/22/2020] [Accepted: 12/17/2020] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Prevention of Frey syndrome (FS) after parotidectomy using an interposition barrier has long been gaining a wide popularity; however, there is no clear evidence regarding which preventive technique is more effective. The aim of this network meta-analysis (NMA) is to answer the question: What is the best method for prevention of FS after parotidectomy? METHODS A comprehensive search of the PubMed, Embase, SCOPUS, and Cochrane library was conducted to identify the eligible studies. The outcome was the incidence of subjective Frey syndrome (SFS) and objective Frey syndrome (OFS). The Bayesian NMA accompanied with a random effects model and 95% credible intervals (CrIs) were calculated using GeMTC R package. RESULTS Thirty-four studies (n = 2987 patients) with five interventions, namely Alloderm (ADM), temporoparietal fascia (TPF), sternocleidomastoid muscle (SCM), superficial musculoaponeurotic system (SMAS), and free fat graft (FFG), were compared together and with no interposition barrier (NB). The results of NMA showed a statistically significant reduction in both SFS and OFS when ADM, TPF, SMAS, FFG, and SCM were compared with NB. No statistical differences were observed when comparing ADM, SCM, SMAS, FFG, and TPF. TPF ranked the best of all treatments (59.4%) and was associated with the least incidence of SFS; whereas ADM ranked the best of all treatments (61.1%) and was associated with the least incidence of OFS. CONCLUSIONS All interventions (TPF flap, ADM, FFG, SMAS, and SCM) were associated with a significant reduction in the incidence of FS when compared with NB. TPF and ADM showed the best outcome with the least incidence of SFS and OFS, respectively.
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Affiliation(s)
- Mubarak Ahmed Mashrah
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Taghrid Aldhohrah
- Guanghua Stomatology Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Ahmed Abdelrehem
- Department of Craniomaxillofacial and Plastic Surgery, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Mohamed Koraitim
- Department of Craniomaxillofacial and Plastic Surgery, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Liping Wang
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
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Sahoo A, Patro S, Swain N, Mohapatra K, Barik H, Pattnayak P. Posterior belly of digastric muscle transposition flap in preventing frey's syndrome after superficial parotidectomy- A prospective study. Ann Maxillofac Surg 2021; 11:266-269. [PMID: 35265496 PMCID: PMC8848698 DOI: 10.4103/ams.ams_21_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 05/23/2021] [Accepted: 07/10/2021] [Indexed: 11/04/2022] Open
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Melong JC, Rigby MH, Corsten M, Trites JRB, Bulter A, Taylor SM. Prospective outcomes following drainless superficial parotidectomy with sternocleidomastoid flap reconstruction. J Otolaryngol Head Neck Surg 2020; 49:72. [PMID: 33023674 PMCID: PMC7541257 DOI: 10.1186/s40463-020-00472-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 09/28/2020] [Indexed: 12/28/2022] Open
Abstract
Background Patients undergoing superficial parotidectomy for benign parotid lesions are at risk of postoperative complications, most notably cosmetic complications such as facial paralysis and contour defects, and functional complications including Frey’s syndrome. Traditionally, surgical drains have been placed at the end of surgery to prevent hematoma and sialocele formation. However, this can increase the risk of postoperative complications and contribute to a prolonged course in hospital. To try and prevent these risks and complications, we introduced a novel technique of a drainless parotidectomy by reconstructing the resulting parotid bed defect with a superiorly based sternocleidomastoid (SCM) rotational flap and by placement of gelfoam into the wound bed and a facelift dressing postoperatively to provide additional hemostasis and avoid drain placement. Methods All patients with benign parotid disease undergoing a drainless superficial parotidectomy and reconstruction with a superiorly based SCM rotational flap at our center were identified within a prospective cohort database between July 2010–2018. Primary outcomes included postoperative cosmetic and functional outcomes, complications and length of hospital stay. A secondary cost analysis was done to compare this novel technique to traditional superficial parotidectomy with surgical drain placement. Results Fifty patients were identified within the database and were included in the final analysis. The average length of hospital stay was 1.02 days. All patients were satisfied with their aesthetic outcome at 1 year. During long term follow-up, 63% of patients reported normal appearance of the operated side. Seven patient’s (14%) developed temporary facial paresis following surgery. All patients had resultant normal facial function at follow-up in 1 year. No patients developed subjective Frey’s Syndrome. Two patients (4%) developed a postoperative sialocele requiring drainage and one patient (2%) developed a hematoma on extubation requiring evacuation and drain placement. Cost analysis demonstrated a cost savings of approximately $975 per person following surgery. Conclusion In the current study, we introduced a novel approach of a drainless superficial parotidectomy using a superiorly based SCM flap, gelfoam and placement of a post-operative facelift dressing. This drainless approach was associated with good long-term cosmetic and functional outcomes with few postoperative complications. This new technique may also offer the potential for long-term savings to the health care system.
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Affiliation(s)
- Jonathan C Melong
- Department of Otolaryngology Head & Neck Surgery, Dalhousie University, Halifax, Nova Scotia, Canada.
| | - Matthew H Rigby
- Department of Otolaryngology Head & Neck Surgery, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Martin Corsten
- Department of Otolaryngology Head & Neck Surgery, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Jonathan R B Trites
- Department of Otolaryngology Head & Neck Surgery, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Angela Bulter
- Department of Otolaryngology Head & Neck Surgery, Dalhousie University, Halifax, Nova Scotia, Canada
| | - S Mark Taylor
- Department of Otolaryngology Head & Neck Surgery, Dalhousie University, Halifax, Nova Scotia, Canada
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Grosheva M, Klußmann JP, Beutner D, Formanek M, Lill C, Laskawi R, Zenk J, Pick C, Erlacher B, Bemmer J, Thielker J, Jering M, Tostmann R, Guntinas-Lichius O. [Planning and design of European prospective randomized trial on the value of drain in parotidectomy]. Laryngorhinootologie 2020; 100:46-53. [PMID: 32516811 DOI: 10.1055/a-1178-0800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
INTRODUCTION There are no valid clinical studies on the value of wound drains in parotid surgery. The aim of the current trial is to analyze the influence of the closed wound drain (redon) on the incidence of postoperative complications such as bleeding, wound healing problems, infection, as well as salivary cyst and fistula after superficial or partial parotidectomy. METHODS A European-wide multicenter prospective randomized study was planned. The study protocol was prepared by the leading study center (ENT University Hospital Cologne) in cooperation with the ENT University Hospitals Jena and Göttingen. The calculation of the number of cases was carried out with G*Power. The study includes test persons with an indication for parotidectomy for a benign tumor without known coagulation disorder or ongoing anticoagulation. Preoperative randomization and data management is software-supported (REDCap 9.1.24, Vanderbilt University). RESULTS The study has been approved by the leading ethics committee in 10/2019 and is open since 04/2019. Currently, nine (9) ENT hospitals are participating in the study, 6 of them in Germany and 3 in Austria. Enrollment of patients is ongoing in 7 centers. With a calculated follow-up-to-treat population of 800 test persons, the planned duration of the study is 4 years. CONCLUSIONS The Redon-study is the first prospective randomized study worldwide to investigate the effect of a drain in parotidectomy. In order to achieve the recruitment goal within the planned time frame, the participation of further specialized study centers is needed. We also encourage all ENT physicians to make their patients aware of the Redon study, inform them about the possibility of participating in the study and refer them to one of the participating centers.
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Affiliation(s)
- Maria Grosheva
- HNO Uniklinik Köln, Medizinische Fakultät, University of Cologne, Köln, Germany
| | - Jens Peter Klußmann
- HNO Uniklinik Köln, Medizinische Fakultät, University of Cologne, Köln, Germany
| | - Dirk Beutner
- Klinik für Hals-Nasen-Ohrenheilkunde, Georg-August-Universität Göttingen, Germany
| | - Michael Formanek
- HNO und Phoniatrie, Krankenhaus der Barmherzigen Brüder, Wien, Austria
| | - Claudia Lill
- Institut für Kopf- und Halserkrankungen, Evangelisches Krankenhaus Wien, Austria
| | - Rainer Laskawi
- Klinik für Hals-Nasen-Ohrenheilkunde, Georg-August-Universität Göttingen, Germany
| | - Johannes Zenk
- Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde, Kopf- und Halschirurgie, Universitätsklinikum Augsburg, Germany
| | - Carina Pick
- HNO Uniklinik Köln, Medizinische Fakultät, University of Cologne, Köln, Germany
| | - Birgit Erlacher
- HNO und Phoniatrie, Krankenhaus der Barmherzigen Brüder, Wien, Austria
| | - Julian Bemmer
- Klinik für Hals-Nasen-Ohrenheilkunde, Georg-August-Universität Göttingen, Germany
| | - Jovanna Thielker
- Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde, Universitätsklinikum Jena, Germany
| | - Monika Jering
- Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde, Kopf- und Halschirurgie, Universitätsklinikum Augsburg, Germany
| | - Ralf Tostmann
- Klinik für Hals-Nasen-Ohrenheilkunde, Georg-August-Universität Göttingen, Germany
| | - Orlando Guntinas-Lichius
- Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde, Kopf- und Halschirurgie, Universitätsklinikum Jena, Germany
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Shim DH, Nguyen TT, Park PG, Kim MJ, Park BW, Jeong HR, Kim DS, Joo HW, Choi SO, Park JH, Lee JM. Development of Botulinum Toxin A-Coated Microneedles for Treating Palmar Hyperhidrosis. Mol Pharm 2019; 16:4913-4919. [DOI: 10.1021/acs.molpharmaceut.9b00794] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | - Thuy Trang Nguyen
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | | | | | | | - Hye-Rin Jeong
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Dae-Sung Kim
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Hyun Woo Joo
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Seong-O Choi
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506, United States
| | - Jung-Hwan Park
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
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Abstract
BACKGROUND Frey's syndrome is characterised by transient flushing and sometimes facial sweating in the area of the auriculotemporal nerve. It most commonly occurs after parotidectomy, but other causes may include submandibular gland surgery, mandibular condylar fracture, obstetric (forceps) trauma, sympathectomy and metabolic disease. Although the pathophysiology of Frey's syndrome remains controversial, the generally accepted hypothesis is that it occurs as the result of injury to the auriculotemporal nerve.There is currently no clear evidence to establish the efficacy and safety of the different methods used for the treatment of Frey's syndrome, therefore the prevention of this symptom during surgery is important. The main method used for prevention is the interposition of a graft between the skin flap and the parotid bed during surgery. Biomaterials, allograft or autograft can be used for this purpose. OBJECTIVES To evaluate the effects and safety of biomaterial, allograft or autograft interposition for the prevention of Frey's syndrome in patients undergoing parotidectomy, and to identify its effect on prevention and delayed occurrence. SEARCH METHODS The Cochrane ENT Information Specialist searched the Cochrane ENT Trials Register; Cochrane Register of Controlled Trials (CENTRAL; 2019, Issue 2); Ovid MEDLINE; Ovid Embase; CINAHL; Web of Science; ClinicalTrials.gov; ICTRP and additional sources for published and unpublished trials. The date of the search was 5 February 2019. SELECTION CRITERIA We included randomised controlled trials (RCTs) in patients with parotid disease (including tumours, inflammation, trauma etc.) undergoing parotidectomy with a minimal follow-up period of six months. We planned to include trials with interventions including biomaterial, allograft or autograft interposition alone or in combination with other surgical techniques. We included trials that compared any graft interposition and no graft interposition, or different graft interpositions. DATA COLLECTION AND ANALYSIS We used the standard methodological procedures expected by Cochrane. Our primary outcome measures were incidence rate of Frey's syndrome assessed clinically (Minor's starch-iodine test) and other complications (postoperative infection, subjective painful or restricted cervical movement, scar spread, rejection of the graft, complications related to the donor site such as accessory nerve injury and haematoma). Our secondary outcome measures were incidence rate of Frey's syndrome assessed by participants (by questionnaire) and sweating area assessed by Minor's starch-iodine test. We used GRADE to assess the certainty of the evidence for each outcome. MAIN RESULTS We included three RCTs (124 participants), two of which we assessed as at high risk of bias and one at unclear risk of bias. All studies were hospital-based and recruited participants undergoing superficial parotidectomy. Most participants were diagnosed with benign lesions of the parotid gland. Participants were followed up for more than six months. The studies evaluated the two comparisons shown below:Sternocleidomastoid muscle flap versus no flapTwo studies assessed this comparison. Both assessed the effects of the sternocleidomastoid muscle flap procedure on the incidence rate of Frey's syndrome assessed clinically but neither showed a significant difference between groups (risk ratio (RR) 0.08, 95% confidence interval (CI) 0.00 to 1.23; 24 participants and RR 1.23, 95% CI 0.88 to 1.73; 36 participants; very low-certainty evidence). We did not pool the data due to the high heterogeneity (I² = 87%).One study found that the sternocleidomastoid muscle flap may result in little or no difference in other complications including haematoma (RR 2.18, 95% CI 0.09 to 50.16; 36 participants; low-certainty evidence), subjective painful or restricted cervical movement (RR 0.54, 95% CI 0.14 to 2.05; 36 participants; low-certainty evidence) and scar spread in the cervical region (RR 0.71, 95% CI 0.05 to 10.54; 36 participants; low-certainty evidence). Both studies reported the incidence rate of Frey's syndrome assessed by participants, with one reporting no events in either group and the other finding no evidence of a difference (RR 0.63, 95% CI 0.32 to 1.26; 36 participants; low-certainty evidence).Acellular dermal matrix versus no graftOnly one study assessed this comparison. Use of an acellular dermal matrix graft may result in little or no difference to the incidence rate of Frey's syndrome (assessed clinically) in comparison with the no graft group, but the evidence is very uncertain (RR 0.08, 95% CI 0.00 to 1.25; 30 participants; very low-certainty evidence).Acellular dermal matrix may slightly increase the wound infection rate compared with control (RR 17.00, 95% CI 1.02 to 282.67; 64 participants; low-certainty evidence). Acellular dermal matrix may result in little or no difference to the incidence of seromas or sialoceles (RR 2.33, 95% CI 0.66 to 8.23; 64 participants; low-certainty evidence). Acellular dermal matrix may result in little or no difference to the incidence rate of Frey's syndrome (assessed by participants) in comparison with the no graft group (RR 0.33, 95% CI 0.04 to 3.04; 64 participants; low-certainty evidence). AUTHORS' CONCLUSIONS The evidence for the effectiveness of graft interposition in preventing Frey's syndrome is of low or very low certainty. The use of acellular dermal matrix may be associated with an increase in the wound infection rate, and little or no difference in the incidence of seromas or sialoceles. Further studies are needed to draw reliable conclusions.
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Affiliation(s)
- Li Ye
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan UniversityDepartment of Head and Neck OncologyNo. 14, Section Three, Ren Min Nan RoadChengduSichuanChina610041
| | - Yubin Cao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan UniversityDepartment of Head and Neck OncologyNo. 14, Section Three, Ren Min Nan RoadChengduSichuanChina610041
| | - Wenbin Yang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan UniversityDepartment of Head and Neck OncologyNo. 14, Section Three, Ren Min Nan RoadChengduSichuanChina610041
| | - Fanglong Wu
- West China Hospital of Stomatology, Sichuan University, State Key Laboratory of Oral DiseasesDepartment of Oral and Maxillofacial SurgeryNo. 14, Section Three, Ren Min Nan RoadChengduChina610041
| | - Jie Lin
- West China Hospital of Stomatology, Sichuan UniversityDepartment of Oral Anaesthesiology and Intensive Care UnitNo 14, Section 3, South Renmin RoadChengduSichuanChina610041
| | - Longjiang Li
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan UniversityDepartment of Head and Neck OncologyNo. 14, Section Three, Ren Min Nan RoadChengduSichuanChina610041
| | - Chunjie Li
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan UniversityDepartment of Head and Neck OncologyNo. 14, Section Three, Ren Min Nan RoadChengduSichuanChina610041
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Chiesa-Estomba CM, Ninchritz E, Rivera-Schmitz T, González-García JA, Larruscain-Sarasola E, Sistiaga-Suarez JA, Calvo-Henríquez C, Altuna-Mariezcurrena X. Translation and validation of the Parotidectomy Outcome Inventory 8 (POI-8) to Spanish. Am J Otolaryngol 2019; 40:499-503. [PMID: 30992144 DOI: 10.1016/j.amjoto.2019.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 04/02/2019] [Indexed: 11/24/2022]
Abstract
INTRODUCTION There are >400 million of native Spanish speakers around the world, being the second most spoken language in regard to the number of native speakers. For this reason, a valid questionnaire to access the quality of our patients after parotidectomy is necessary. MATERIAL AND METHODS Validation and cross-cultural adaptation of the POI-8 questionnaire to the Spanish language. Internal consistency of Sp-POI 8 measured with Cronbach α. RESULTS 35 patients met the inclusion criteria during the mentioned period. Mean age was 59 ± 15,37 (Min: 18/Max: 87). 20 patients (57,1%) were male and 15 (42,9%) were female. Internal consistency with Cronbach α was 0.868. The intraclass correlation coefficient was 0.830 [CI] (95%: 0,791-925). Hypoesthesia was the most severely weighted problem (0,91) and xerostomia was the second (0,89). However, the high score was for fear of revision surgery (1,26). CONCLUSION The Spanish Language is the second most spoken language with regard to the number of native speakers and the Sp-POI 8 translation represents a valid option for the Spanish-speaking medical community, from which a large number of patients can benefit.
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DALOĞLU MUSTAFA, GÜNEY KENAN. THE INCIDENCE AND SEVERITY OF FREY’S SYNDROME AFTER PAROTIDECTOMY: A RETROSPECTIVE STUDY. ENT Updates 2019. [DOI: 10.32448/entupdates.568049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Grosheva M, Pick C, Granitzka T, Sommer B, Wittekindt C, Klussmann JP, Guntinas‐Lichius O, Beutner D. Impact of extent of parotidectomy on early and long‐term complications: A prospective multicenter cohort trial. Head Neck 2019; 41:1943-1951. [DOI: 10.1002/hed.25651] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 08/21/2018] [Accepted: 12/21/2018] [Indexed: 11/07/2022] Open
Affiliation(s)
- Maria Grosheva
- Department of Otorhinolaryngology, Head and Neck SurgeryUniversity of Cologne Cologne Germany
| | - Carina Pick
- Department of Otorhinolaryngology, Head and Neck SurgeryUniversity of Cologne Cologne Germany
| | - Thordis Granitzka
- Department of Otolaryngology, Head and Neck SurgeryJena University Hospital Jena Germany
| | - Barbara Sommer
- Department of Otolaryngology, Head and Neck SurgeryUniversity of Giessen Giessen Germany
| | - Claus Wittekindt
- Department of Otolaryngology, Head and Neck SurgeryUniversity of Giessen Giessen Germany
| | - Jens Peter Klussmann
- Department of Otorhinolaryngology, Head and Neck SurgeryUniversity of Cologne Cologne Germany
- Department of Otolaryngology, Head and Neck SurgeryUniversity of Giessen Giessen Germany
| | | | - Dirk Beutner
- Department of Otorhinolaryngology, Head and Neck SurgeryUniversity of Cologne Cologne Germany
- Department of Otolaryngology, Head and Neck SurgeryUniversity of Goettingen Goettingen Germany
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Abstract
OBJECTIVES/HYPOTHESIS To describe a previously unreported variant of Frey syndrome. Gustatory sweating is a common complication of parotidectomy and typically directly overlies the surgical site or parotid bed. In some instances, the sweating may occur beyond the parotid bed or involve tissue that was undisturbed during the procedure. STUDY DESIGN Retrospective case series. METHODS All cases of temporoparietal Frey syndrome in a single surgeon's experience were reviewed. RESULTS Seven patients were found to have temporoparietal Frey syndrome. Three patients had concomitant first bite syndrome. Three patients had some form of reconstruction at time of surgery. The mean time to onset of symptoms was 11.5 months, with a range of 7 to 21 months. Four patients did not require any treatment for their symptoms, but two patients required intradermal Botox injections for symptomatic relief. DISCUSSION This study describes a previously unreported variant of Frey syndrome with symptoms occurring distal to the parotid gland. This likely develops either by regeneration of severed postganglionic fibers into sympathetic targets distally along the course of the auriculotemporal nerve or by regeneration into fibers of the sympathetic plexus traveling along the superficial temporal artery. LEVEL OF EVIDENCE Laryngoscope, 129:2071-2075, 2019.
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Affiliation(s)
- C Burton Wood
- Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, U.S.A
| | - James L Netterville
- Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, U.S.A
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Infante-Cossio P, Gonzalez-Cardero E, Garcia-Perla-Garcia A, Montes-Latorre E, Gutierrez-Perez JL, Prats-Golczer VE. Complications after superficial parotidectomy for pleomorphic adenoma. Med Oral Patol Oral Cir Bucal 2018; 23:e485-e492. [PMID: 29924764 PMCID: PMC6051677 DOI: 10.4317/medoral.22386] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 05/31/2018] [Indexed: 11/30/2022] Open
Abstract
Background The significance of complications after superficial parotidectomy remains unclear, since prospective studies are lacking. The aim of this study was to evaluate facial nerve dysfunction and other postoperative complications after superficial parotidectomy for pleomorphic adenoma of the superficial lobe and to identify the associated risk factors. Material and Methods Prospective and descriptive clinical study on 79 patients undergoing formal superficial parotidectomy with the modified facelift incision, dissection of the facial nerve and reconstruction with the superficial musculoaponeurotic system flap. Function of the facial nerve using the House-Brackmann scale and the intra- and postoperative complications were recorded at 1 week and 1, 3, 6 and 12 months. A descriptive, inferential and binary logistic regression analysis were performed for the variables facial nerve dysfunction, tumor size and location, clinical presentation and duration of surgery. Results 77.2% of the patients presented facial paresis at 1 week, with the marginal-mandibular branch being the most commonly affected (64.5%). 94.9% recovered the facial function at 6 months and 100% at 12 months. A statistically significant relationship was found between the appearance of facial paresis and tumor location in the superior lateral area of the superficial lobe, size >2 cm and prolonged operative time. None of the remaining variables showed significant differences at any study timepoint. At 12 months, 57% of patients had recovered tactile sensitivity in the earlobe. The clinical occurrence of Frey’s syndrome was 11.4%. Conclusions Despite the high incidence of postoperative facial paresis at 1 week, its magnitude was low and the recovery time was short. Tumor location in the parotid superficial lobe upper area, size and prolonged operative time are risk factors that can worsen facial paresis at different study timepoints. The knowledge of these complications is relevant for patient´s counseling and to achieve better long-term outcomes. Key words:Superficial parotidectomy, pleomorphic adenoma, parotid gland, facial nerve paralysis, postoperative complications.
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Affiliation(s)
- P Infante-Cossio
- Department of Oral and Maxillofacial Surgery, Virgen del Rocio University Hospital, Av. Manuel Siurot, 41013-Seville, Spain,
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Thielker J, Grosheva M, Ihrler S, Wittig A, Guntinas-Lichius O. Contemporary Management of Benign and Malignant Parotid Tumors. Front Surg 2018; 5:39. [PMID: 29868604 PMCID: PMC5958460 DOI: 10.3389/fsurg.2018.00039] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 04/30/2018] [Indexed: 12/25/2022] Open
Abstract
To report the standard of care, interesting new findings and controversies about the treatment of parotid tumors. Relevant and actual studies were searched in PubMed and reviewed for diagnostics, treatment and outcome of both benign and malignant tumors. Prospective trials are lacking due to rarity of the disease and high variety of tumor subtypes. The establishment of reliable non-invasive diagnostics tools for the differentiation between benign and malignant tumors is desirable. Prospective studies clarifying the association between different surgical techniques for benign parotid tumors and morbidity are needed. The role of adjuvant or definitive radiotherapy in securing loco-regional control and improving survival in malignant disease is established. Prospective clinical trials addressing the role of chemotherapy/molecular targeted therapy for parotid cancer are needed. An international consensus on the classification of parotid surgery techniques would facilitate the comparison of different trials. Such efforts should lead into a clinical guideline.
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Affiliation(s)
- Jovanna Thielker
- Department of Otorhinolaryngology, Universitätsklinikum Jena, Jena, Germany
| | - Maria Grosheva
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Cologne, Germany
| | - Stephan Ihrler
- Laboratory for Dermatohistology and Oral Pathology, Munich, Germany
| | - Andrea Wittig
- Department of Radiotherapy and Radiation Oncology, Universitätsklinikum Jena, Jena, Germany
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Wolber P, Volk G, Horstmann L, Finkensieper M, Shabli S, Wittekindt C, Klussmann J, Guntinas‐Lichius O, Beutner D, Grosheva M. Patient‘s perspective on long‐term complications after superficial parotidectomy for benign lesions: Prospective analysis of a 2‐year follow‐up. Clin Otolaryngol 2018; 43:1073-1079. [DOI: 10.1111/coa.13104] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2018] [Indexed: 11/30/2022]
Affiliation(s)
- P. Wolber
- Medical Faculty Department of Otorhinolaryngology, Head and Neck Surgery University of Cologne CologneGermany
| | - G.F. Volk
- Department of Otorhinolaryngology, Head and Neck Surgery Jena University Hospital Jena Germany
| | - L. Horstmann
- Medical Faculty Department of Otorhinolaryngology, Head and Neck Surgery University of Cologne CologneGermany
| | - M. Finkensieper
- Department of Otorhinolaryngology, Head and Neck Surgery Jena University Hospital Jena Germany
| | - S. Shabli
- Medical Faculty Department of Otorhinolaryngology, Head and Neck Surgery University of Cologne CologneGermany
| | - C. Wittekindt
- Department of Otorhinolaryngology, Head and Neck Surgery University of Giessen Giessen Germany
| | - J.P. Klussmann
- Medical Faculty Department of Otorhinolaryngology, Head and Neck Surgery University of Cologne CologneGermany
| | - O. Guntinas‐Lichius
- Department of Otorhinolaryngology, Head and Neck Surgery Jena University Hospital Jena Germany
| | - D. Beutner
- Medical Faculty Department of Otorhinolaryngology, Head and Neck Surgery University of Cologne CologneGermany
- Department of Otorhinolaryngology Head and Neck Surgery University of Göttingen Göttingen Germany
| | - M. Grosheva
- Medical Faculty Department of Otorhinolaryngology, Head and Neck Surgery University of Cologne CologneGermany
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Grosheva M, Shabli S, Volk GF, Sommer B, Ludwig L, Finkensieper M, Wittekindt C, Klussmann JP, Guntinas-Lichius O, Beutner D. Sensation loss after superficial parotidectomy: A prospective controlled multicenter trial. Head Neck 2017; 39:520-526. [PMID: 28067982 DOI: 10.1002/hed.24647] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 09/04/2016] [Accepted: 10/21/2016] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND The purpose of this study was to evaluate the occurrence of hypoesthesia after superficial parotidectomy depending on preservation of posterior branch of the great auricular nerve (GAN). METHODS This prospective, controlled, double blind, multicenter trial included 130 patients. The posterior branch was preserved in 93 patients (GAN group), and ligated in 33 patients (non-GAN group). In 4 patients, GAN status was unknown. Included patients underwent sensory testing (TouchTest) and subjective evaluation at 6, 12, and 24 months after surgery. RESULTS Better improvement of sensation was present in the GAN group. After 12 months, 59% of the patients in the GAN-group showed positive test results in the lobule, versus 24% of the non-GAN group (p = .013). Additionally, after 24 months, 71% of the patients in the GAN-group showed a positive test in the antitragus, versus 31% in the non-GAN group (p = .045). Hypoesthesia equally limited quality of life in both groups (all p > .05). CONCLUSION Preservation of the posterior branch of the GAN led to significantly better improvement of sensation in the lobule and antitragus, and should be recommended during parotidectomy. © 2017 Wiley Periodicals, Inc. Head Neck 39: 520-526, 2017.
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Affiliation(s)
- Maria Grosheva
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Cologne, Germany
| | - Sami Shabli
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Cologne, Germany
| | - Gerd Fabian Volk
- Department of Otorhinolaryngology, Head and Neck Surgery, Jena University Hospital, Jena, Germany
| | - Barbara Sommer
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Giessen, Giessen, Germany
| | - Laura Ludwig
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Cologne, Germany
| | - Mira Finkensieper
- Department of Otorhinolaryngology, Head and Neck Surgery, Jena University Hospital, Jena, Germany.,Department of Otorhinolaryngology, Head and Neck Surgery, St. Anna Clinic, Wuppertal, Germany
| | - Claus Wittekindt
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Giessen, Giessen, Germany
| | - Jens Peter Klussmann
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Giessen, Giessen, Germany
| | - Orlando Guntinas-Lichius
- Department of Otorhinolaryngology, Head and Neck Surgery, Jena University Hospital, Jena, Germany
| | - Dirk Beutner
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Cologne, Germany
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