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Zhu C, Na Y, Cheng X, Tao X, Xie P, Chen L, Zhao H, Qiu J, Gu X, Xiang J, Liu K. Assessing the influence of parameters on tissue welding in small bowel end-to-end anastomosis in vitro and in vivo. Surg Endosc 2024; 38:3126-3137. [PMID: 38622226 DOI: 10.1007/s00464-024-10795-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 03/09/2024] [Indexed: 04/17/2024]
Abstract
BACKGROUND The use of high-frequency electric welding technology for intestinal end-to-end anastomosis holds significant promise. Past studies have focused on in vitro, and the safety and efficacy of this technology is uncertain, severely limiting the clinical application of this technology. This study investigates the impact of compression pressure, energy dosage, and duration on anastomotic quality using a homemade anastomosis device in both in vitro and in vivo settings. METHODS Two hundred eighty intestines and 5 experimental pigs were used for in vitro and in vivo experiments, respectively. The in vitro experiments were conducted to study the effects of initial pressure (50-400 kpa), voltage (40-60 V), and time (10-20 s) on burst pressure, breaking strength, thermal damage, and histopathological microstructure of the anastomosis. Optimal parameters were then inlaid into a homemade anastomosis and used for in vivo experiments to study the postoperative porcine survival rate and the pathological structure of the tissues at the anastomosis and the characteristics of the collagen fibers. RESULTS The anastomotic strength was highest when the compression pressure was 250 kPa, the voltage was 60 V, and the time was 15 s. The degree of thermal damage to the surrounding tissues was the lowest. The experimental pigs had no adverse reactions after the operation, and the survival rate was 100%. 30 days after the operation, the surgical site healed well, and the tissues at the anastomosis changed from immediate adhesions to permanent connections. CONCLUSION High-frequency electric welding technology has a certain degree of safety and effectiveness. It has the potential to replace the stapler anastomosis in future and become the next generation of new anastomosis device.
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Affiliation(s)
- Caihui Zhu
- School of Information Science and Technology, Fudan University, Shanghai, China
| | - Yuyan Na
- Department of Sports Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiujun Cheng
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaonan Tao
- School of Information Science and Technology, Fudan University, Shanghai, China
| | - Pengyao Xie
- School of Information Science and Technology, Fudan University, Shanghai, China
| | - Lei Chen
- School of Information Science and Technology, Fudan University, Shanghai, China
| | - Hui Zhao
- School of Information Science and Technology, Fudan University, Shanghai, China
| | - Jian Qiu
- School of Information Science and Technology, Fudan University, Shanghai, China
| | - Xiaodong Gu
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Jianbin Xiang
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Kefu Liu
- School of Information Science and Technology, Fudan University, Shanghai, China.
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Iwai S, Kobayashi S, Torai S, Kobayashi E. Development and application of a spray tip that enables electrocoagulation of a variety of tissues. Heliyon 2023; 9:e17771. [PMID: 37560677 PMCID: PMC10407041 DOI: 10.1016/j.heliyon.2023.e17771] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 08/11/2023] Open
Abstract
BACKGROUND Spray hemostasis is possible using a high-frequency power source from the tip of an electric scalpel; however, the difficulties regarding the uniformity and rapidity of the hemostasis surface remain. This study reports the development of a novel electrocoagulation device tip that can be used in endoscopic and robotic surgeries and can quickly coagulate and hemostat and easily adjust the extent of cauterization and hemostasis while minimizing the depth of thermal injury. METHODS The safety and efficacy of the hemostatic device were verified in a porcine model. A liver surface transection was conducted in vivo and the rapidity of the hemostatic effect of the device was observed. An extracted stomach, kidney, and liver were cauterized ex vivo by three operators with different surgical skills and the effects were analyzed pathologically. In addition, a sacrificed pig cadaver was used to achieve hemostasis at a renal transection site using the multi-spray endoscope tip. RESULTS An increase in the number of tip terminals expanded the cauterization surface and shortened the cauterization time. In parenchymatous organs, uniform cauterization was possible without increasing the depth of thermal injury. The cauterization depth did not depend on the operator's skill, and the spray coagulation was safe. The variable spray tip allowed for simple hemostasis during open and laparoscopic surgeries. CONCLUSIONS This novel electrocoagulation device tip can be developed as a forceps that can change the spray range and can be used during laparoscopic and robotic surgeries.
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Affiliation(s)
- Satomi Iwai
- Kitasato University School of Veterinary Medicine, Endowed Chair for the Promotion of Minipig Research, 35-1, Higashi 23, Towada City, Aomori, 034-8628, Japan
| | - Shou Kobayashi
- Kobayashi Regenerative Research Institute, LLC, 1 Chayanochou, Wakayama-shi, Wakayama-ken, 640-8263, Japan
| | - Shinji Torai
- Department of Kidney Regenerative Medicine, Industry-Academia Collaborative Department, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Eiji Kobayashi
- Kitasato University School of Veterinary Medicine, Endowed Chair for the Promotion of Minipig Research, 35-1, Higashi 23, Towada City, Aomori, 034-8628, Japan
- Kobayashi Regenerative Research Institute, LLC, 1 Chayanochou, Wakayama-shi, Wakayama-ken, 640-8263, Japan
- Department of Kidney Regenerative Medicine, Industry-Academia Collaborative Department, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo, 105-8461, Japan
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van de Berg NJ, Nieuwenhuyzen-de Boer GM, Gao XS, Rijstenberg LL, van Beekhuizen HJ. Plasma Device Functions and Tissue Effects in the Female Pelvis-A Systematic Review. Cancers (Basel) 2023; 15:cancers15082386. [PMID: 37190314 DOI: 10.3390/cancers15082386] [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: 03/07/2023] [Revised: 04/07/2023] [Accepted: 04/18/2023] [Indexed: 05/17/2023] Open
Abstract
Medical use of (non-)thermal plasmas is an emerging field in gynaecology. However, data on plasma energy dispersion remain limited. This systematic review presents an overview of plasma devices, fields of effective application, and impact of use factors and device settings on tissues in the female pelvis, including the uterus, ovaries, cervix, vagina, vulva, colon, omentum, mesenterium, and peritoneum. A search of the literature was performed on 4 January 2023 in the Medline Ovid, Embase, Cochrane, Web of Science, and Google Scholar databases. Devices were classified as plasma-assisted electrosurgery (ES) using electrothermal energy, neutral argon plasma (NAP) using kinetic particle energy, or cold atmospheric plasma (CAP) using non-thermal biochemical reactions. In total, 8958 articles were identified, of which 310 were scanned, and 14 were included due to containing quantitative data on depths or volumes of tissues reached. Plasma-assisted ES devices produce a thermal effects depth of <2.4 mm. In turn, NAP effects remained superficial, <1.0 mm. So far, the depth and uniformity of CAP effects are insufficiently understood. These data are crucial to achieve complete treatment, reduce recurrence, and limit damage to healthy tissues (e.g., prevent perforations or preserve parenchyma). Upcoming and potentially high-gain applications are discussed, and deficits in current evidence are identified.
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Affiliation(s)
- Nick J van de Berg
- Department of Gynaecological Oncology, Erasmus MC Cancer Institute, 3015 GD Rotterdam, The Netherlands
- Department of Biomechanical Engineering, Delft University of Technology, 2628 CD Delft, The Netherlands
| | - Gatske M Nieuwenhuyzen-de Boer
- Department of Gynaecological Oncology, Erasmus MC Cancer Institute, 3015 GD Rotterdam, The Netherlands
- Department of Obstetrics and Gynaecology, Albert Schweitzer Hospital, 3318 AT Dordrecht, The Netherlands
| | - Xu Shan Gao
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynaecology, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - L Lucia Rijstenberg
- Department of Pathology, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands
| | - Heleen J van Beekhuizen
- Department of Gynaecological Oncology, Erasmus MC Cancer Institute, 3015 GD Rotterdam, The Netherlands
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Spaich S, Berlit S, Berger L, Weiss C, Tuschy B, Sütterlin M, Stefanovic S. First experiences with a diode laser in major gynecological laparoscopic procedures show lack of benefit and impaired feasibility. Lasers Med Sci 2023; 38:34. [PMID: 36600026 DOI: 10.1007/s10103-022-03696-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 12/16/2022] [Indexed: 01/06/2023]
Abstract
PURPOSE The aim of this study is to evaluate feasibility and potential benefit of a diode laser in major laparoscopic procedures in gynecology. METHODS Between 2018 and 2020, a total of 42 cases were enrolled in this study comparing standard electrosurgery with diode laser-supported therapy in laparoscopic supracervical hysterectomy (LASH), total laparoscopic hysterectomy (TLH), or laparoscopic myoma enucleation (LME). Dual wavelength 45 W diode laser light was used to cut and coagulate during laparoscopy in the prospective interventional arm consisting of 11 cases, while 31 matching patients who received conventional treatment with monopolar/bipolar current for the same interventions were retrospectively identified in our laparoscopy database. Recruitment in the prospective interventional laser diode arm was terminated after only 11 patients (instead of planned 50) due to intense hemorrhage and massive smoke development. RESULTS A total of 42 cases were analyzed (11 LME, 19 LASH, and 12 TLH). Strong smoke development was evident in all 11 cases in the diode laser arm. It was necessary to convert to bipolar or monopolar current in all hysterectomies (n = 9) with initial diode laser implementation due to increased bleeding and smoke development. Conventional current sources had to be used in LMEs (n = 2) due to excessive bleeding and poor visibility during enucleation of the fibroid. A significant difference (p < 0.0001) was observed regarding smoke development when comparing the laser arm with the control arm. CONCLUSION We found a 45-W diode laser to be inferior to electrosurgical techniques for major laparoscopic gynecologic surgeries regarding bleeding control and smoke development.
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Affiliation(s)
- Saskia Spaich
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany.
| | - Sebastian Berlit
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany
| | - Laura Berger
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany
| | - Christel Weiss
- Department of Medical Statistics and Biomathematics, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany
| | - Benjamin Tuschy
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany
| | - Marc Sütterlin
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany
| | - Stefan Stefanovic
- Department of Obstetrics and Gynecology, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany
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Gallegos H, Bravo JC, Sepúlveda F, Astroza GM. Intrarenal temperature measurement associated with holmium laser intracorporeal lithotripsy in an ex vivo model. Cent European J Urol 2022; 74:588-594. [PMID: 35083081 PMCID: PMC8771124 DOI: 10.5173/ceju.2021.0092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 10/10/2021] [Accepted: 10/10/2021] [Indexed: 11/22/2022] Open
Abstract
Introduction The aim of this article was to quantify the effect of the use of holmium laser during intracorporeal lithotripsy in an ex vivo model. Material and methods A simulated model for laser nephro-lithotripsy was designed. Two ex vivo porcine kidneys were used. Electronic thermometer electrodes were inserted on the upper calyx. Intracorporeal lithotripsy was simulated with a holmium laser. Intrarenal temperature was recorded both at the beginning and after one minute of laser use with delta temperature (DT) defined as the difference between them. Measurements were made at different irrigation heights (30, 40, and 50 cm H2O), frequency (Hz), and laser energy (J) in addition to the presence or absence of the access sheath. Analysis of factors associated with temperature change was performed. Results Thirty-eight observations were recorded. The measurement without the use of access sheath showed an average DT of 4.9, 5.1, and 6.5°C for 5, 10, and 15 Hz, respectively; however, with a sheath, DTs were 0.2, 0.5, and 1.5°C. In terms of energy, mean DTs of 4.3, 6.1, 5.2, and 13.9°C for 0.5, 0.8, 1.0, and 1.5 J were recorded; in contrast, with a sheath, averages of 0.4, 0.5, 0.5, and 3.8°C, respectively were noted. In the adjusted model, energy, frequency, and use of sheath and water height were significant. Conclusions The configuration of the laser significantly modifies the intrarenal temperature and height of the bladder irrigation. The use of an access sheath provides lower intrarenal temperatures regardless of laser configuration and water height.
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Affiliation(s)
- Héctor Gallegos
- Graduate School, Faculty of Medicine, Catholic University of Chile, Santiago, Chile
| | - Juan Cristóbal Bravo
- Graduate School, Faculty of Medicine, Catholic University of Chile, Santiago, Chile
| | - Francisca Sepúlveda
- Graduate School, Faculty of Medicine, Catholic University of Chile, Santiago, Chile
| | - Gastón M Astroza
- Department of Urology, School of Medicine, Catholic University of Chile, Santiago, Chile
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6
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Brinkmann F, Hüttner R, Mehner PJ, Henkel K, Paschew G, Herzog M, Martens N, Richter A, Hinz S, Groß J, Schafmayer C, Hampe J, Hendricks A, Schwandner F. Temperature profile and residual heat of monopolar laparoscopic and endoscopic dissection instruments. Surg Endosc 2022; 36:4507-4517. [PMID: 34708296 PMCID: PMC9085678 DOI: 10.1007/s00464-021-08804-4] [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: 04/06/2021] [Accepted: 10/17/2021] [Indexed: 01/29/2023]
Abstract
BACKGROUND Endoscopic and laparoscopic electrosurgical devices (ED) are of great importance in modern medicine but can cause adverse events such as tissue injuries and burns from residual heat. While laparoscopic tools are well investigated, detailed insights about the temperature profile of endoscopic knives are lacking. Our aim is to investigate the temperature and the residual heat of laparoscopic and endoscopic monopolar instruments to increase the safety in handling ED. METHODS An infrared camera was used to measure the temperature of laparoscopic and endoscopic instruments during energy application and to determine the cooling time to below 50 °C at a porcine stomach. Different power levels and cutting intervals were studied to investigate their impact on the temperature profile. RESULTS During activation, the laparoscopic hook exceeded 120 °C regularly for an up to 10 mm shaft length. With regards to endoknives, only the Dual Tip Knife showed a shaft temperature of above 50 °C. The residual heat of the laparoscopic hook remained above 50 °C for at least 15 s after activation. Endoknives cooled to below 50 °C in 4 s. A higher power level and longer cutting duration significantly increased the shaft temperature and prolonged the cooling time (p < 0.001). CONCLUSION Residual heat and maximum temperature during energy application depend strongly on the chosen effect and cutting duration. To avoid potential injuries, the user should not touch any tissue with the laparoscopic hook for at least 15 s and with the endoknives for at least 4 s after energy application. As the shaft also heats up to over 120 °C, the user should be careful to avoid tissue contact during activation with the shaft. These results should be strongly considered for safety reasons when handling monopolar ED.
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Affiliation(s)
- Franz Brinkmann
- Department of Medicine I, University Hospital Dresden, Technische Universität Dresden (TU Dresden), Dresden, Germany ,Chair of Microsystems, Faculty of Electrical and Computer Engineering, Technische Universität Dresden (TU Dresden), Dresden, Germany ,Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden (TU Dresden), Dresden, Germany ,Department of Medicine I, University Hospital Carl Gustav Carus, Technische Universität Dresden (TU Dresden), Fetscherstr. 74, 01307 Dresden, Germany
| | - Ronny Hüttner
- Chair of Microsystems, Faculty of Electrical and Computer Engineering, Technische Universität Dresden (TU Dresden), Dresden, Germany
| | - Philipp J. Mehner
- Chair of Microsystems, Faculty of Electrical and Computer Engineering, Technische Universität Dresden (TU Dresden), Dresden, Germany
| | - Konrad Henkel
- Chair of Microsystems, Faculty of Electrical and Computer Engineering, Technische Universität Dresden (TU Dresden), Dresden, Germany
| | - Georgi Paschew
- Chair of Microsystems, Faculty of Electrical and Computer Engineering, Technische Universität Dresden (TU Dresden), Dresden, Germany
| | - Moritz Herzog
- Department of Medicine I, University Hospital Dresden, Technische Universität Dresden (TU Dresden), Dresden, Germany ,Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden (TU Dresden), Dresden, Germany
| | - Nora Martens
- Department of Medicine I, University Hospital Dresden, Technische Universität Dresden (TU Dresden), Dresden, Germany ,Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden (TU Dresden), Dresden, Germany
| | - Andreas Richter
- Chair of Microsystems, Faculty of Electrical and Computer Engineering, Technische Universität Dresden (TU Dresden), Dresden, Germany ,Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden (TU Dresden), Dresden, Germany
| | - Sebastian Hinz
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Justus Groß
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Clemens Schafmayer
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Jochen Hampe
- Department of Medicine I, University Hospital Dresden, Technische Universität Dresden (TU Dresden), Dresden, Germany ,Else Kröner Fresenius Center for Digital Health, Technische Universität Dresden (TU Dresden), Dresden, Germany
| | - Alexander Hendricks
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
| | - Frank Schwandner
- Department of General, Visceral, Vascular and Transplantation Surgery, University Medical Center Rostock, Rostock, Germany
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Abstract
Just as laparoscopic surgery provided a giant leap in safety and recovery for patients over open surgery methods, robotic-assisted surgery (RAS) is doing the same to laparoscopic surgery. The first laparoscopic-RAS systems to be commercialized were the Intuitive Surgical, Inc. (Sunnyvale, CA, USA) da Vinci and the Computer Motion Zeus. These systems were similar in many aspects, which led to a patent dispute between the two companies. Before the dispute was settled in court, Intuitive Surgical bought Computer Motion, and thus owned critical patents for laparoscopic-RAS. Recently, the patents held by Intuitive Surgical have begun to expire, leading to many new laparoscopic-RAS systems being developed and entering the market. In this study, we review the newly commercialized and prototype laparoscopic-RAS systems. We compare the features of the imaging and display technology, surgeons console and patient cart of the reviewed RAS systems. We also briefly discuss the future directions of laparoscopic-RAS surgery. With new laparoscopic-RAS systems now commercially available we should see RAS being adopted more widely in surgical interventions and costs of procedures using RAS to decrease in the near future.
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Mattsson MO, Simkó M. Emerging medical applications based on non-ionizing electromagnetic fields from 0 Hz to 10 THz. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2019; 12:347-368. [PMID: 31565000 PMCID: PMC6746309 DOI: 10.2147/mder.s214152] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 08/23/2019] [Indexed: 12/13/2022] Open
Abstract
The potential for using non-ionizing electromagnetic fields (EMF; at frequencies from 0 Hz up to the THz range) for medical purposes has been of interest since many decades. A number of established and familiar methods are in use all over the world. This review, however, provides an overview of applications that already play some clinical role or are in earlier stages of development. The covered methods include modalities used for bone healing, cancer treatment, neurological conditions, and diathermy. In addition, certain other potential clinical areas are touched upon. Most of the reviewed technologies deal with therapy, whereas just a few diagnostic approaches are mentioned. None of the discussed methods are having such a strong impact in their field of use that they would be expected to replace conventional methods. Partly this is due to a knowledge base that lacks mechanistic explanations for EMF effects at low-intensity levels, which often are used in the applications. Thus, the possible optimal use of EMF approaches is restricted. Other reasons for the limited impact include a scarcity of well-performed randomized clinical trials that convincingly show the efficacy of the methods and that standardized user protocols are mostly lacking. Presently, it seems that some EMF-based methods can have a niche role in treatment and diagnostics of certain conditions, mostly as a complement to or in combination with other, more established, methods. Further development and a stronger impact of these technologies need a better understanding of the interaction mechanisms between EMF and biological systems at lower intensity levels. The importance of the different physical parameters of the EMF exposure needs also further investigations.
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Affiliation(s)
- Mats-Olof Mattsson
- SciProof International AB, Östersund, Sweden
- Strömstad Akademi, Institute for Advanced Studies, Strömstad, Sweden
| | - Myrtill Simkó
- SciProof International AB, Östersund, Sweden
- Strömstad Akademi, Institute for Advanced Studies, Strömstad, Sweden
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9
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Adank MW, Fleischer JC, Dankelman J, Hendriks BHW. Real-time oncological guidance using diffuse reflectance spectroscopy in electrosurgery: the effect of coagulation on tissue discrimination. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-10. [PMID: 30447060 DOI: 10.1117/1.jbo.23.11.115004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Accepted: 10/15/2018] [Indexed: 05/15/2023]
Abstract
In breast surgery, a lack of knowledge about what is below the tissue surface may lead to positive tumor margins and iatrogenic damage. Diffuse reflectance spectroscopy (DRS) is a spectroscopic technique that can distinguish between healthy and tumor tissue making it a suitable technology for intraoperative guidance. However, because tumor surgeries are often performed with an electrosurgical knife, the effect of a coagulated tissue layer on DRS measurements must be taken into account. It is evaluated whether real-time DRS measurements obtained with a photonic electrosurgical knife could provide useful information of tissue properties also when tissue is coagulated and cut. The size of the coagulated area is determined and the effect of its presence on DR spectra is studied using ex vivo porcine adipose and muscle tissue. A coagulated tissue layer with a depth of 0.1 to 0.4 mm is observed after coagulating muscle with an electrosurgical knife. The results show that the effect of coagulating adipose tissue is negligible. Using the fat/water ratio's calculated from the measured spectra of the photonic electrosurgical knife, it was possible to determine the distance from the instrument tip to a tissue transition during cutting. In conclusion, the photonic electrosurgical knife can determine tissue properties of coagulated and cut tissue and has, therefore, the potential to provide real-time feedback about the presence of breast tumor margins during cutting, helping surgeons to establish negative margins and improve patient outcome.
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Affiliation(s)
- Maartje W Adank
- Delft University of Technology, Biomechanical Engineering Department, Delft, The Netherlands
| | - Julie C Fleischer
- Delft University of Technology, Biomechanical Engineering Department, Delft, The Netherlands
| | - Jenny Dankelman
- Delft University of Technology, Biomechanical Engineering Department, Delft, The Netherlands
| | - Benno H W Hendriks
- Delft University of Technology, Biomechanical Engineering Department, Delft, The Netherlands
- Philips Research, In-Body Systems Department, Eindhoven, The Netherlands
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10
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Kreeft D, Arkenbout EA, Henselmans PWJ, van Furth WR, Breedveld P. Review of Techniques to Achieve Optical Surface Cleanliness and Their Potential Application to Surgical Endoscopes. Surg Innov 2017; 24:509-527. [PMID: 28511635 PMCID: PMC5603965 DOI: 10.1177/1553350617708959] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A clear visualization of the operative field is of critical importance in endoscopic surgery. During surgery the endoscope lens can get fouled by body fluids (eg, blood), ground substance, rinsing fluid, bone dust, or smoke plumes, resulting in visual impairment. As a result, surgeons spend part of the procedure on intermittent cleaning of the endoscope lens. Current cleaning methods that rely on manual wiping or a lens irrigation system are still far from ideal, leading to longer procedure times, dirtying of the surgical site, and reduced visual acuity, potentially reducing patient safety. With the goal of finding a solution to these issues, a literature review was conducted to identify and categorize existing techniques capable of achieving optically clean surfaces, and to show which techniques can potentially be implemented in surgical practice. The review found that the most promising method for achieving surface cleanliness consists of a hybrid solution, namely, that of a hydrophilic or hydrophobic coating on the endoscope lens and the use of the existing lens irrigation system.
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Affiliation(s)
- Davey Kreeft
- 1 Delft University of Technology, Delft, Netherlands
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11
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Meeuwsen FC, Guédon ACP, Arkenbout EA, van der Elst M, Dankelman J, van den Dobbelsteen JJ. The Art of Electrosurgery: Trainees and Experts. Surg Innov 2017; 24:373-378. [PMID: 28438057 PMCID: PMC5505226 DOI: 10.1177/1553350617705207] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The benefits of electrosurgery have been acknowledged since the early 1920s, and nowadays more than 80% of surgical procedures involve devices that apply energy to tissues. Despite its widespread use, it is currently unknown how the operator’s choices with regard to instrument selection and application technique are related to complications. As such, the manner in which electrosurgery is applied can have a serious influence on the outcome of the procedure and the well-being of patients. The aim of this study is to investigate the variety of differences in usage of electrosurgical devices. Our approach is to measure these parameters to provide insight into application techniques. A sensor was developed that records the magnitude of electric current delivered to an electrosurgical device at a frequency of 10 Hz. The sensor is able to detect device activation times and a reliable estimate of the power-level settings. Data were recorded for 91 laparoscopic cholecystectomies performed by different surgeons and residents. Results of the current measurement data show differences in the way electrosurgery is applied by surgeons and residents during a laparoscopic cholecystectomy. Variations are seen in the number of activations, the activation time, and the approach for removal of the gallbladder. Analysis showed that experienced surgeons have a longer activation time than residents (3.01 vs 1.41 seconds, P < .001) and a lower number of activations (102 vs 123). This method offers the opportunity to relate application techniques to clinical outcome and to provide input for the development of a best practice model.
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12
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Molina WR, Silva IN, Donalisio da Silva R, Gustafson D, Sehrt D, Kim FJ. Influence of saline on temperature profile of laser lithotripsy activation. J Endourol 2014; 29:235-9. [PMID: 25154455 DOI: 10.1089/end.2014.0305] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE We established an ex vivo model to evaluate the temperature profile of the ureter during laser lithotripsy, the influence of irrigation on temperature, and thermal spread during lithotripsy with the holmium:yttrium-aluminum-garnet (Ho:YAG) laser. MATERIALS AND METHODS Two ex vivo models of Ovis aries urinary tract and human calcium oxalate calculi were used. The Open Ureteral Model was opened longitudinally to measure the thermal profile of the urothelium. On the Clinical Model, anterograde ureteroscopy was performed in an intact urinary system. Temperatures were measured on the external portion of the ureter and the urothelium during lithotripsy and intentional perforation. The lithotripsy group (n=20) was divided into irrigated (n=10) and nonirrigated (n=10), which were compared for thermal spread length and values during laser activation. The intentional perforation group (n=10) was evaluated under saline flow. The Ho:YAG laser with a 365 μm laser fiber and power at 10W was used (1J/Pulse at 10 Hz). Infrared Fluke Ti55 Thermal Imager was used for evaluation. Maximum temperature values were recorded and compared. RESULTS On the Clinical Model, the external ureteral wall obtained a temperature of 37.4°C±2.5° and 49.5°C±2.3° (P=0.003) and in the Open Ureteral Model, 49.7°C and 112.4°C with and without irrigation, respectively (P<0.05). The thermal spread along the external ureter wall was not statically significant with or without irrigation (P=0.065). During intentional perforation, differences in temperatures were found between groups (opened with and without irrigation): 81.8°±8.8° and 145.0°±15.0°, respectively (P<0.005). CONCLUSION There is an increase in the external ureteral temperature during laser activation, but ureteral thermal values decreased when saline flow was applied. Ureter thermal spread showed no difference between irrigated and nonirrigated subgroups. This is the first laser lithotripsy thermography study establishing the framework to evaluate the temperature profile in the future.
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Affiliation(s)
- Wilson R Molina
- Division of Urology, Department of Surgery, Denver Health Medical Center, University of Colorado , School of Medicine, Denver, Colorado
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