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Richards HS, Cousins S, Scroggie DL, Elliott D, Macefield R, Hudson E, Mutanga IR, Shah M, Alford N, Blencowe NS, Blazeby J. Examining the application of the IDEAL framework in the reporting and evaluation of innovative invasive procedures: secondary qualitative analysis of a systematic review. BMJ Open 2024; 14:e079654. [PMID: 38803251 PMCID: PMC11129025 DOI: 10.1136/bmjopen-2023-079654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 05/01/2024] [Indexed: 05/29/2024] Open
Abstract
OBJECTIVES The development of new surgical procedures is fundamental to advancing patient care. The Idea, Developments, Exploration, Assessment and Long-term (IDEAL) framework describes study designs for stages of innovation. It can be difficult to apply due to challenges in defining and identifying innovative procedures. This study examined how the IDEAL framework is operationalised in real-world settings; specifically, the types of innovations evaluated using the framework and how authors justify their choice of IDEAL study design. DESIGN Secondary qualitative analysis of a systematic review. DATA SOURCES Citation searches (Web of Science and Scopus) identified studies following the IDEAL framework and citing any of the ten key IDEAL/IDEAL_D papers. ELIGIBILITY CRITERIA Studies of invasive procedures/devices of any design citing any of the ten key IDEAL/IDEAL_D papers. DATA EXTRACTION AND SYNTHESIS All relevant text was extracted. Three frameworks were developed, namely: (1) type of innovation under evaluation; (2) terminology used to describe stage of innovation and (3) reported rationale for IDEAL stage. RESULTS 48 articles were included. 19/48 described entirely new procedures, including those used for the first time in a different clinical context (n=15/48), reported as IDEAL stage 2a (n=8, 53%). Terminology describing stage of innovation was varied, inconsistent and ambiguous and was not defined. Authors justified their choice of IDEAL study design based on limitations in published evidence (n=36) and unknown feasibility and safety (n=32) outcomes. CONCLUSION Identifying stage of innovation is crucial to inform appropriate study design and governance decisions. Authors' rationale for choice of IDEAL stage related to the existing evidence base or lack of sufficient outcome data for procedures. Stage of innovation was poorly defined with inconsistent descriptions. Further work is needed to develop methods to identify innovation to inform practical application of the IDEAL framework. Defining the concept of innovation in terms of uncertainty, risk and degree of evidence may help to inform decision-making.
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Affiliation(s)
- Hollie Sarah Richards
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Sian Cousins
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Darren L Scroggie
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Daisy Elliott
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Rhiannon Macefield
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Elizabeth Hudson
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Ian Rodney Mutanga
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Maximilian Shah
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Natasha Alford
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Natalie S Blencowe
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
| | - Jane Blazeby
- National Institute for Health Research Bristol Biomedical Research Centre Surgical and Orthopaedic Innovation Theme, Bristol Centre for Surgical Research, Bristol Medical School, University of Bristol Medical School, Bristol, UK
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Buijs M, de Bruin DM, Wagstaff PG, J Zondervan P, Scheltema MJV, W Engelbrecht M, P Laguna M, van Lienden KP. MRI and CT in the follow-up after irreversible electroporation of small renal masses. DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY (ANKARA, TURKEY) 2021; 27:654-663. [PMID: 34559050 DOI: 10.5152/dir.2021.19575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
PURPOSE Ablation plays a growing role in the treatment of small renal masses (SRMs) due to its nephron sparing properties and low invasiveness. Irreversible electroporation (IRE) has the potential, although still experimental, to overcome current limitations of thermal ablation. No prospective imaging studies exist of the ablation zone in the follow up after renal IRE in humans. Objectives are to assess computed tomography (CT) and magnetic resonance imaging (MRI) on the ablation zone volume (AZV), enhancement and imaging characteristics after renal IRE. METHODS Prospective phase 2 study of IRE in nine patients with ten SRMs. MRI imaging was performed pre-IRE, 1 week, 3 months, 6 months and 12 months after IRE. CT was performed pre-IRE, perioperatively (direct after ablation), 3 months, 6 months and 12 months after IRE. AZVs were assessed by two independent observers. Observer variation was analyzed. Evolution of AZVs, and relation between the needle configuration volume (NCV; planned AZV) and CT- and MRI volumes were evaluated. RESULTS Eight SRMs were clear cell renal cell carcinomas, one SRM was a papillary renal cell carcinoma and one patient had a non-diagnostic biopsy. On CT, median AZV increased perioperatively until 3 months post-IRE (respectively, 16.8 cm3 and 6.2 cm3) compared to the NCV (4.8 cm3). On MRI, median AZV increased 1-week post-IRE until 3 months post-IRE (respectively, 14.5 cm3 and 4.6 cm3) compared to the NCV (4.8 cm3). At 6 months the AZV starts decreasing (CT 4.8 cm3; MRI 3.0 cm3), continuing at 12 months (CT 4.2 cm3, MRI 1.1 cm3). Strong correlation was demonstrated between the planning and the post-treatment volumes. Inter-observer agreement between observers was excellent (CT 95% CI 0.82-0.95, MRI 95% CI 0.86-0.96). All SRMs appeared non-enhanced immediately after ablation, except for one residual tumour. Subtraction images confirmed non-enhancement on MRI in unclear enhancement cases (3/9). Directly after IRE, gas bubbles, perinephric stranding and edema were observed in all cases. CONCLUSION The AZV increases immediately on CT until 3 months after IRE. On MRI, the AZV increases at 1 week until 3 months post-IRE. At 6 months the AZV starts decreasing until 12 months post-IRE on both CT and MRI. Enhancement was absent post-IRE, except for one residual tumour. Gas bubbles, perinephric stranding and edema are normal findings directly post-IRE.
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Affiliation(s)
- Mara Buijs
- Department of Urology, Academic Medical Center, Amsterdam, The Netherlands
| | - Daniel M de Bruin
- Department of Urology, Academic Medical Center, Amsterdam, The Netherlands; Department of Biomedical Engineering - Physics, Academic Medical Center, Amsterdam, The Netherlands
| | - Peter Gk Wagstaff
- Department of Urology, Academic Medical Center, Amsterdam, The Netherlands
| | | | | | - Marc W Engelbrecht
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Maria P Laguna
- Department of Urology, Istanbul Medipol University, Instanbul, Turkey
| | - Krijn P van Lienden
- Department of Radiology, Academic Medical Center, Amsterdam, The Netherlands
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Macefield RC, Wilson N, Hoffmann C, Blazeby JM, McNair AGK, Avery KNL, Potter S. Outcome selection, measurement and reporting for new surgical procedures and devices: a systematic review of IDEAL/IDEAL-D studies to inform development of a core outcome set. BJS Open 2020; 4:1072-1083. [PMID: 33016009 PMCID: PMC8444278 DOI: 10.1002/bjs5.50358] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/20/2020] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Outcome selection, measurement and reporting for the evaluation of new surgical procedures and devices is inconsistent and lacks standardization. A core outcome set may promote the safe and transparent evaluation of surgical innovations. This systematic review examined outcome selection, measurement and reporting in studies conducted within the IDEAL (Idea, Development, Exploration, Assessment and Long-term monitoring) framework to examine current practice and inform the development of a core outcome set for early-phase studies of surgical procedures/devices. METHODS Web of Science and Scopus citation searches were performed to identify author-reported IDEAL/IDEAL-D studies for any surgical procedure/device. Outcomes were extracted verbatim, including contextual information regarding outcome selection and measurement. Outcomes were categorized to inform a conceptual framework of outcome domains relevant to evaluating innovation. RESULTS Some 48 studies were identified. Outcome selection, measurement and reporting varied widely across studies in different IDEAL stages. From 1737 outcomes extracted, 22 domains specific to evaluating innovation were conceptualized under seven broad categories: procedure completion success/failure; modifications; unanticipated events; surgeons' experiences; patients' experiences; resource use specific to the innovative procedure/device; and other innovation-specific outcomes. Most innovation-specific outcomes were measured and reported in only a small number of studies. CONCLUSION This review highlighted the need for guidance and standardization in outcome selection and reporting in the evaluation of new surgical procedures/devices. Novel outcome domains specific to innovation have been identified to establish a core outcome set for future evaluations of surgical innovations.
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Affiliation(s)
- R. C. Macefield
- National Institute for Health Research Bristol Biomedical Research Centre, Bristol Centre for Surgical Research, Bristol Medical SchoolUniversity of BristolBristolUK
| | - N. Wilson
- National Institute for Health Research Bristol Biomedical Research Centre, Bristol Centre for Surgical Research, Bristol Medical SchoolUniversity of BristolBristolUK
| | - C. Hoffmann
- National Institute for Health Research Bristol Biomedical Research Centre, Bristol Centre for Surgical Research, Bristol Medical SchoolUniversity of BristolBristolUK
| | - J. M. Blazeby
- National Institute for Health Research Bristol Biomedical Research Centre, Bristol Centre for Surgical Research, Bristol Medical SchoolUniversity of BristolBristolUK
| | - A. G. K. McNair
- National Institute for Health Research Bristol Biomedical Research Centre, Bristol Centre for Surgical Research, Bristol Medical SchoolUniversity of BristolBristolUK
- Department of Gastrointestinal SurgeryBristolUK
| | - K. N. L. Avery
- National Institute for Health Research Bristol Biomedical Research Centre, Bristol Centre for Surgical Research, Bristol Medical SchoolUniversity of BristolBristolUK
| | - S. Potter
- National Institute for Health Research Bristol Biomedical Research Centre, Bristol Centre for Surgical Research, Bristol Medical SchoolUniversity of BristolBristolUK
- Bristol Breast Care CentreNorth Bristol NHS TrustBristolUK
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Agnass P, van Veldhuisen E, van Gemert MJC, van der Geld CWM, van Lienden KP, van Gulik TM, Meijerink MR, Besselink MG, Kok HP, Crezee J. Mathematical modeling of the thermal effects of irreversible electroporation for in vitro, in vivo, and clinical use: a systematic review. Int J Hyperthermia 2020; 37:486-505. [DOI: 10.1080/02656736.2020.1753828] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Pierre Agnass
- Department of Radiation Oncology, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
- Department of Surgery, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Eran van Veldhuisen
- Department of Surgery, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Martin J. C. van Gemert
- Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Cees W. M. van der Geld
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Krijn P. van Lienden
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Thomas M. van Gulik
- Department of Surgery, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Martijn R. Meijerink
- Department of Radiology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Marc G. Besselink
- Department of Surgery, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - H. Petra Kok
- Department of Radiation Oncology, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Johannes Crezee
- Department of Radiation Oncology, Amsterdam UMC, University of Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
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Thermodynamic profiling during irreversible electroporation in porcine liver and pancreas: a case study series. J Clin Transl Res 2020; 5:109-132. [PMID: 32617426 PMCID: PMC7326268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 03/05/2020] [Accepted: 03/07/2020] [Indexed: 11/24/2022] Open
Abstract
AIMS First, the aim of the study was to determine whether irreversible electroporation (IRE) is associated with heat generation in the liver and pancreas at clinical (≤1,500 V/cm) and supraclinical (>1,500 V/cm) electroporation settings; second, to assess the risk of thermal tissue damage in and adjacent to the treated volume in highly perfused versus moderately perfused parts of both organs; third, to investigate the influence of perfusion and of the presence and the orientation of a metal stent on the maximal thermal elevation (ΔTSession,max) in the tissue during an IRE session at fixed IRE settings, and finally, to determine whether the maximum temperature elevation within the IRE-subjected organ during an IRE treatment (single or multiple sessions) is reflected in the organ's surface temperature. METHODS The aims were investigated in 12 case studies conducted in five female Landrace pigs. Several IRE settings were applied for lateral (2), triangular (3), and rectangular (4) electrode configurations in the liver hilum, liver periphery, pancreas head, and pancreas tail. IRE series of 10-90 pulses were applied with pulse durations that varied from 70 μs to 90 μs and electric field strengths between 1,200 V/cm and 3,000 V/cm. In select cases, a metal stent was positioned in the bile duct at the level of the liver hilum. Temperatures were measured before, during, and after IRE in and adjacent to the treatment volumes using fiber optical temperature probes (temperature at the nucleation centers) and digital thermography (surface temperature). The occurrence of thermal damage was assumed to be at temperatures above 50 °C (ΔTSession,max ≥ 13 °C relative to body temperature of 37 °C). The temperature fluctuations at the organ surface (ΔTLocSurf) were compared to the maximum temperature elevation during an IRE treatment in the electroporation zone. In select cases, IRE was applied to tissue volumes encompassing the portal vein (PV) and a constricted and patent superior mesenteric vein (SMV) to determine the influence of the heatsink effect of PV and SMV on ΔTSession,max. RESULTS The median baseline temperature was 31.6 °C-36.3 °C. ΔTSession,max ranged from -1.7 °C to 25.5 °C in moderately perfused parts of the liver and pancreas, and from 0.0 °C to 5.8 °C in highly perfused parts. The median ΔTLocSurf of the liver and pancreas was 1.0 °C and 10.3 °C, respectively. Constricting the SMV in the pancreas head yielded a 0.8 °C higher ΔTSession,max. The presence of a metal stent in the liver hilum resulted in a ΔTSession,max of 19.8 °C. Stents parallel to the electrodes caused a ΔTSession,max difference of 4.2 °C relative to the perpendicular orientation. CONCLUSIONS Depending on IRE settings and tissue type, IRE is capable of inducing considerable heating in the liver and pancreas that is sufficient to cause thermal tissue damage. More significant temperature elevations are positively correlated with increasing number of electrode pairs, electric field strength, and pulse number. Temperature elevations can be further exacerbated by the presence and orientation of metal stents. Temperature elevations at the nucleation centers are not always reflected in the organ's surface temperature. Heat sink effects caused by large vessels were minimal in some instances, possibly due to reduced blood flow caused by anesthesia. RELEVANCE FOR PATIENTS Appropriate IRE settings must be chosen based on the tissue type and the presence of stents to avoid thermal damage in healthy peritumoral tissue and to protect anatomical structures [Table: see text].
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Vogel JA, van Veldhuisen E, Alles LK, Busch OR, Dijk F, van Gulik TM, Huijzer GM, Besselink MG, van Lienden KP, Verheij J. Time-Dependent Impact of Irreversible Electroporation on Pathology and Ablation Size in the Porcine Liver: A 24-Hour Experimental Study. Technol Cancer Res Treat 2020; 18:1533033819876899. [PMID: 31533537 PMCID: PMC6753518 DOI: 10.1177/1533033819876899] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Irreversible electroporation causes cell death through low frequency, high voltage electrical pulses and is increasingly used to treat non-resectable cancers. A recent systematic review revealed that tissue damage through irreversible electroporation is time-dependent, but the impact of time on the ablation zone size remains unknown. Irreversible electroporation ablations were performed hourly during 24 consecutive hours in the peripheral liver of 2 anaesthetized domestic pigs using clinical treatment settings. Immediately after the 24th ablation, the livers were harvested and examined for tissue response in time based on macroscopic and microscopic pathology. The impact of time on these outcomes was assessed with Spearman rank correlation test. Ablation zones were sharply demarcated as early as 1 hour after treatment. During 24 hours, the ablation zones showed a significant increase in diameter (rs = 0.493, P = .014) and total surface (rs = 0.499, P = .013), whereas the impact of time on the homogeneous ablated area was not significant (rs = 0.172, P = .421). Therefore, the increase in size could mainly be attributed to an increase in the transition zone. Microscopically, the ablation zones showed progression in cell death and inflammation. This study assessed the dynamics of irreversible electroporation on the porcine liver during 24 consecutive hours and found that the pathological response (ie, cell death/inflammation), and ablation size continue to develop for at least 24 hours. Consequently, future studies on irreversible electroporation should prolong their observation period.
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Affiliation(s)
- Jantien A Vogel
- Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Eran van Veldhuisen
- Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Lindy K Alles
- Department of Experimental Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Olivier R Busch
- Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Frederike Dijk
- Department of Pathology, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Thomas M van Gulik
- Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands.,Department of Experimental Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Goos M Huijzer
- Department of Experimental Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Marc G Besselink
- Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Krijn P van Lienden
- Department of Interventional Radiology, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Joanne Verheij
- Department of Pathology, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
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Abstract
PURPOSE OF REVIEW With the increasing incidence of small renal masses (SRMs), ablative technologies are becoming more commonly utilized. With any nascent treatment modality, outcomes literature needs to be constantly re-evaluated. The purpose of this review is to revisit the most updated literature regarding the safety and efficacy of ablative treatments of renal lesions. RECENT FINDINGS Recent literature demonstrates that small renal tumor ablation is safe and effective. Although it does not have the same oncological efficacy of surgical extirpation, local recurrence-free survival has consistently shown to be around 90%. Cryoablation and radiofrequency ablation have longer-term data demonstrating durable responses. Microwave ablation and irreversible electroporation are promising modalities with longer-term data coming. Complication rates and procedural morbidity of ablation are consistently lower than for partial nephrectomy. SUMMARY Image-guided focal ablation is a valuable tool in the management of SRMs. Although it does not have the same efficacy of surgical extirpation, with the ability to perform repeat procedures and salvage surgery if necessary, oncologic outcomes are comparable to those of upfront surgery. Ultimately, longer-term studies and prospective trials are needed to further elucidate these modalities.
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Rubin AE, Usta OB, Schloss R, Yarmush M, Golberg A. Selective Inactivation of Pseudomonas aeruginosa and Staphylococcus epidermidis with Pulsed Electric Fields and Antibiotics. Adv Wound Care (New Rochelle) 2019; 8:136-148. [PMID: 31737412 DOI: 10.1089/wound.2018.0819] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 10/15/2018] [Indexed: 01/17/2023] Open
Abstract
Objective: Increasing numbers of multidrug-resistant bacteria make many antibiotics ineffective; therefore, new approaches to combat microbial infections are needed. In addition, antibiotics are not selective-they kill pathogenic organisms as well as organisms that could positively contribute to wound healing (bio flora). Approach: Here we report on selective inactivation of Pseudomonas aeruginosa and Staphylococcus epidermidis, potential pathogens involved in wound infections with pulsed electric fields (PEFs) and antibiotics (mix of penicillin, streptomycin, and nystatin). Results: Using a Taguchi experimental design in vitro, we found that, under similar electric field strengths, the pulse duration is the most important parameter for P. aeruginosa inactivation, followed by the number of pulses and pulse frequency. P. aeruginosa, a potential severe pathogen, is more sensitive than the less pathogenic S. epidermidis to PEF (alone or in combination with antibiotics). Applying 200 pulses with a duration of 60 μs at 2.8 Hz, the minimum electric fields of 308.8 ± 28.3 and 378.4 ± 12.9 V/mm were required to inactive P. aeruginosa and S. epidermidis, respectively. Addition of antibiotics reduced the threshold for minimum electric fields required to inactivate the bacteria. Innovation: This study provides essential information, such as critical electric field parameters for bacteria inactivation, required for developing in vivo treatment and clinical protocols for using PEF for wound healing. Conclusion: A combination of PEFs with antibiotics reduces the electric field threshold required for bacteria disinfection. Such an approach simplifies devices required to disinfect large areas of infected wounds.
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Affiliation(s)
- Andrey Ethan Rubin
- Porter School of Environment and Earth Sciences, Tel Aviv University Ramat Aviv, Tel Aviv, Israel
| | - Osman Berk Usta
- Center for Engineering in Medicine, Massachusetts General Hospital Shriners Burn Hospital for Children and Harvard Medical School, Boston, Massachusetts
| | - Rene Schloss
- Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey
| | - Martin Yarmush
- Center for Engineering in Medicine, Massachusetts General Hospital Shriners Burn Hospital for Children and Harvard Medical School, Boston, Massachusetts
- Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey
| | - Alexander Golberg
- Porter School of Environment and Earth Sciences, Tel Aviv University Ramat Aviv, Tel Aviv, Israel
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Feasibility and safety of irreversible electroporation (IRE) in patients with small renal masses: Results of a prospective study. Urol Oncol 2019; 37:183.e1-183.e8. [DOI: 10.1016/j.urolonc.2018.11.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 10/15/2018] [Accepted: 11/05/2018] [Indexed: 01/01/2023]
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10
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Liu B, Clark J, Domes T, Wall C, Jana K. Percutaneous irreversible electroporation for the treatment of small renal masses: The first Canadian case series. Can Urol Assoc J 2019; 13:E263-E267. [PMID: 30763229 DOI: 10.5489/cuaj.5728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Irreversible electroporation (IRE) is a novel technology used in the minimally invasive treatment of small solid organ tumours. Currently, there is a paucity of literature studying treatment of small renal masses (SRMs) with IRE. Our pilot study is the first case series in Canada to use IRE in the treatment of SRMs. METHODS This retrospective cohort pilot study includes five patients (three females and two males) who presented with a SRM that was deemed not amendable to any other treatment than a radical nephrectomy or IRE. The IRE procedures were carried out by an interventional radiologist in conjunction with a urologist using the Angiodynamics NanoKnife IRE device. RESULTS Mean tumour size was 28 mm (range 18-39), with a mean R.E.N.A.L. nephrometry score of 8.4±0.55. Over a mean followup of 22.8 months (range 14-31), four out of the five patients did not have a radiological recurrence. No adverse events were reported after the five IRE procedures. Renal function was stable post-IRE, with no to negligible decreases in estimated glomerular filtration rate detected (range +2 to -13 mL/min/1.73 m2). CONCLUSIONS Our pilot study demonstrates that renal percutaneous IRE is safe to use in the context of challenging-to-treat SRMs. Early radiological and renal function outcomes are encouraging, but further study is required to assess oncological success. The small sample size, retrospective nature of the study, relatively short followup, and the lack of routine renal biopsy to confirm malignancy are the major limitations noted.
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Affiliation(s)
- Bonnie Liu
- Department of Surgery, Division of Urology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Jordyn Clark
- Department of Surgery, Division of Urology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Trustin Domes
- Department of Surgery, Division of Urology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Chris Wall
- Department of Surgery, Division of Urology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Kunal Jana
- Department of Surgery, Division of Urology, University of Saskatchewan, Saskatoon, SK, Canada
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Zondervan PJ, Buijs M, De Bruin DM, van Delden OM, Van Lienden KP. Available ablation energies to treat cT1 renal cell cancer: emerging technologies. World J Urol 2018; 37:445-455. [PMID: 30448873 PMCID: PMC6424924 DOI: 10.1007/s00345-018-2546-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 10/23/2018] [Indexed: 12/13/2022] Open
Abstract
Purpose An increasing interest in percutaneous ablation of renal tumors has been caused by the increasing incidence of SRMs, the trend toward minimally invasive nephron-sparing treatments and the rapid development of local ablative technologies. In the era of shared decision making, patient preference for non-invasive treatments also leads to an increasing demand for image-guided ablation. Although some guidelines still reserve ablation for poor surgical candidates, indications may soon expand as evidence for the use of the two most validated local ablative techniques, cryoablation (CA) and radiofrequency ablation (RFA), is accumulating. Due to the collaboration between experts in the field in biomedical engineering, urologists, interventional radiologists and radiation oncologists, the improvements in ablation technologies have been evolving rapidly in the last decades, resulting in some new emerging types of ablations. Methods A literature search was conducted to identify original research articles investigating the clinical outcomes of new emerging technologies, percutaneous MWA, percutaneous IRE and SABR, in patients with primary cT1 localized renal cell cancer. Results Due to the collaboration between experts in the field in biomedical engineering, urologists, interventional radiologists and radiation oncologists, the improvements in ablation technologies have been evolving rapidly in the last decades. New emerging technologies such as microwave ablation (MWA), irreversible electroporation (IRE) and stereotactic ablative radiotherapy (SABR) seem to be getting ready for prime time. Conclusion This topical paper describes the new emerging technologies for cT1 localized renal cell cancer and investigates how they compare to CA and RFA.
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Affiliation(s)
- P J Zondervan
- Department of Urology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
| | - M Buijs
- Department of Urology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - D M De Bruin
- Department of Urology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.,Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - O M van Delden
- Department of Radiology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - K P Van Lienden
- Department of Radiology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
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Salagierski M, Wojciechowska A, Zając K, Klatte T, Thompson RH, Cadeddu JA, Kaouk J, Autorino R, Ahrar K, Capitanio U. The Role of Ablation and Minimally Invasive Techniques in the Management of Small Renal Masses. Eur Urol Oncol 2018; 1:395-402. [PMID: 31158078 DOI: 10.1016/j.euo.2018.08.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/14/2018] [Accepted: 08/31/2018] [Indexed: 12/25/2022]
Abstract
CONTEXT Nephron-sparing approaches are increasingly recommended for incidental small renal masses. Herein, we review the current literature regarding the safety and efficacy of focal therapy, including percutaneous ablation, for small renal masses. OBJECTIVE To summarize the application of ablative therapy in the management of small renal masses. EVIDENCE ACQUISITION PubMed and Medline database search was performed to look for findings published since 2000 on focal therapy for small renal masses. After literature review, 64 articles were selected and discussed. EVIDENCE SYNTHESIS Radiofrequency ablation and cryotherapy are the most widely used procedures with intermediate-term oncological outcome comparable with surgical series. Cost effectiveness seems excellent and side effects appear acceptable. To date, no randomized trial comparing percutaneous focal therapy with standard surgical approach or active surveillance has been performed. CONCLUSIONS Focal ablative therapies are now accepted as effective treatment for small renal tumors. For tumors <3cm, oncological effectiveness of ablative therapies is comparable with that of partial nephrectomy. Percutaneous ablation has fewer complications and a better postoperative profile when compared with minimally invasive partial nephrectomy. PATIENT SUMMARY Focal ablative therapies are now accepted as effective treatment for small renal tumors. For tumors <3cm, oncological effectiveness of ablative therapies is comparable with that of partial nephrectomy.
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Affiliation(s)
- Maciej Salagierski
- Urology Department, The Faculty of Medicine and Health Sciences, University of Zielona Góra, Zielona Góra, Poland.
| | - Adrianna Wojciechowska
- Urology Department, The Faculty of Medicine and Health Sciences, University of Zielona Góra, Zielona Góra, Poland
| | - Kinga Zając
- Urology Department, The Faculty of Medicine and Health Sciences, University of Zielona Góra, Zielona Góra, Poland
| | - Tobias Klatte
- Department of Urology, Royal Bournemouth and Christchurch Hospitals, Bournemouth, UK
| | | | | | - Jihad Kaouk
- Department of Urology, Cleveland Clinic Foundation, Cleveland, OH, USA
| | | | - Kamran Ahrar
- Interventional Radiology, The University of Texas MD Anderson Cancer Center, TX, USA
| | - Umberto Capitanio
- Unit of Urology, Division of Experimental Oncology, Urological Research Institute (URI), IRCCS Ospedale San Raffaele, Milan, Italy
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Thermal Ablation of T1c Renal Cell Carcinoma: A Comparative Assessment of Technical Performance, Procedural Outcome, and Safety of Microwave Ablation, Radiofrequency Ablation, and Cryoablation. J Vasc Interv Radiol 2018; 29:943-951. [PMID: 29628298 DOI: 10.1016/j.jvir.2017.12.020] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/01/2017] [Accepted: 12/19/2017] [Indexed: 12/18/2022] Open
Abstract
PURPOSE To evaluate perioperative outcomes of thermal ablation with microwave (MW), radiofrequency (RF), and cryoablation for stage T1c renal cell carcinoma (RCC). MATERIALS AND METHODS A retrospective analysis of 384 patients (mean age, 71 y; range, 22-88 y) was performed between October 2006 and October 2016. Mean radius, exophytic/endophytic, nearness to collecting system or sinus, anterior/posterior, and location relative to polar lines; preoperative aspects and dimensions used for anatomic classification; and centrality index scores were 6.3, 7.9, and 2.7, respectively. Assessment of pre- and postablation serum blood urea nitrogen, creatinine, and estimated glomerular filtration rate was performed to assess functional outcomes. Linear regression analyses were performed to compare sedation medication dosages among the three treatment cohorts. Univariable and multivariable logistic regression analyses were performed to compare rates of residual disease and complications among treatment modalities. RESULTS A total of 437 clinical stage T1N0M0 biopsy-proven RCCs measuring 1.2-6.9 cm were treated with computed tomography (CT)-guided MW ablation (n = 44; 10%), RF ablation (n = 347; 79%), or cryoablation (n = 46; 11%). There were no significant differences in patient demographic or tumor characteristics among cohorts. Complication rates and immediate renal function changes were similar among the three ablation modalities (P = .46 and P = .08, respectively). MW ablation was associated with significantly decreased ablation time (P < .05), procedural time (P < .05), and dosage of sedative medication (P < .05) compared with RF ablation and cryoablation. CONCLUSIONS CT-guided percutaneous MW ablation is comparable to RF ablation or cryoablation for the treatment of stage T1N0M0 RCC with regard to treatment response and is associated with shorter treatment times and less sedation than RF ablation or cryoablation. In addition, the safety profile of CT-guided MW ablation is noninferior to those of RF ablation or cryoablation.
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Sano MB, DeWitt MR, Teeter SD, Xing L. Optimization of a single insertion electrode array for the creation of clinically relevant ablations using high-frequency irreversible electroporation. Comput Biol Med 2018; 95:107-117. [DOI: 10.1016/j.compbiomed.2018.02.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 02/13/2018] [Accepted: 02/13/2018] [Indexed: 12/18/2022]
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Van Bruwaene S, Namdarian B, Challacombe B, Eddy B, Billiet I. Introducing new technology safely into urological practice. World J Urol 2018; 36:543-548. [PMID: 29327248 DOI: 10.1007/s00345-018-2173-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 01/03/2018] [Indexed: 02/06/2023] Open
Abstract
PURPOSE Surgical innovation is necessary to ensure continued improvement in patient care. However, several challenges unique to the surgical craft are encountered during the development and validation of such new technology. This article highlights some of these challenges and gives an overview of existing solutions. METHODS A Pubmed review was performed about the "introduction of new technology" to identify challenges. Cross-referencing was used to explore the possible solutions per challenge. RESULTS Several characteristics of the surgical craft itself limit our ability to establish randomised controlled trials and hence provide clear categorical evidence. Existing certification bodies for new technology often use unstructured regulations and allow fast-track bypassing systems. Consequently the IDEAL framework (innovation, development, exploration, assessment, long-term follow-up) proposes an objective scientific approach whilst defining stakeholder responsibilities. The selection of which new modality to implement is heavily influenced by third parties unrelated to the best patient outcomes and thus professional organisations can aid in this decision-making. Appropriate training of surgeons and their teams until proficiency is achieved is essential prior to credentialling. Finally long-term surveillance of outcomes in the form of registries is an increasing responsibility of the urological community to maintain our role in directing the adoption or rejection of these innovations. CONCLUSION Urological innovation is a dynamic and challenging process. Increasing efforts are identified within the urological community to render the process more reliable and transparent.
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Affiliation(s)
| | | | - Ben Challacombe
- Guy's Hospital, Guy's and St Thomas' Trust (GSTT), London, UK
| | - Ben Eddy
- Kent and Canterbury Hospital, East Kent Hospital Trust (EKHUFT), Canterbury, UK
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