1
|
Lee J, Currow D, Lovell M, Phillips JL, McLachlan A, Ritchie M, Brown L, Fazekas B, Aggarwal R, Seah D, Sheehan C, Chye R, Noble B, McCaffrey N, Aggarwal G, George R, Kow M, Ayoub C, Linton A, Sanderson C, Mittal D, Rao A, Prael G, Urban K, Vandersman P, Agar M. Lidocaine for Neuropathic Cancer Pain (LiCPain): study protocol for a mixed-methods pilot study. BMJ Open 2023; 13:e066125. [PMID: 36810169 PMCID: PMC9945039 DOI: 10.1136/bmjopen-2022-066125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
INTRODUCTION Many patients experience unrelieved neuropathic cancer-related pain. Most current analgesic therapies have psychoactive side effects, lack efficacy data for this indication and have potential medication-related harms. The local anaesthetic lidocaine (lignocaine) has the potential to help manage neuropathic cancer-related pain when administered as an extended, continuous subcutaneous infusion. Data support lidocaine as a promising, safe agent in this setting, warranting further evaluation in robust, randomised controlled trials. This protocol describes the design of a pilot study to evaluate this intervention and explains the pharmacokinetic, efficacy and adverse effects evidence informing the design. METHODS AND ANALYSIS A mixed-methods pilot study will determine the feasibility of an international first, definitive phase III trial to evaluate the efficacy and safety of an extended continuous subcutaneous infusion of lidocaine for neuropathic cancer-related pain. This study will comprise: a phase II double-blind randomised controlled parallel-group pilot of subcutaneous infusion of lidocaine hydrochloride 10% w/v (3000 mg/30 mL) or placebo (sodium chloride 0.9%) over 72 hours for neuropathic cancer-related pain, a pharmacokinetic substudy and a qualitative substudy of patients' and carers' experiences. The pilot study will provide important safety data and help inform the methodology of a definitive trial, including testing proposed recruitment strategy, randomisation, outcome measures and patients' acceptability of the methodology, as well as providing a signal of whether this area should be further investigated. ETHICS AND DISSEMINATION Participant safety is paramount and standardised assessments for adverse effects are built into the trial protocol. Findings will be published in a peer-reviewed journal and presented at conferences. This study will be considered suitable to progress to a phase III study if there is a completion rate where the CI includes 80% and excludes 60%. The protocol and Patient Information and Consent Form have been approved by Sydney Local Health District (Concord) Human Research Ethics Committee 2019/ETH07984 and University of Technology Sydney ETH17-1820. TRIAL REGISTRATION NUMBER ANZCTR ACTRN12617000747325.
Collapse
Affiliation(s)
- Jessica Lee
- IMPACCT (Improving Palliative, Aged and Chronic Care through Clinical Research and Translation), University of Technology Sydney Faculty of Health, Broadway, New South Wales, Australia
- Concord Centre for Palliative Care, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | - David Currow
- University of Wollongong Faculty of Science Medicine and Health, Wollongong, New South Wales, Australia
| | - Melanie Lovell
- Greenwich Palliative and Supportive Care Services, HammondCare, Sydney, New South Wales, Australia
- Northern Clinical School, The University of Sydney, St Leonards, New South Wales, Australia
| | - Jane L Phillips
- IMPACCT (Improving Palliative, Aged and Chronic Care through Clinical Research and Translation), University of Technology Sydney Faculty of Health, Broadway, New South Wales, Australia
- School of Nursing, Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Andrew McLachlan
- Sydney Pharmacy School, The University of Sydney, Sydney, New South Wales, Australia
| | - Megan Ritchie
- Concord Centre for Palliative Care, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | - Linda Brown
- IMPACCT (Improving Palliative, Aged and Chronic Care through Clinical Research and Translation), University of Technology Sydney Faculty of Health, Broadway, New South Wales, Australia
| | - Belinda Fazekas
- IMPACCT (Improving Palliative, Aged and Chronic Care through Clinical Research and Translation), University of Technology Sydney Faculty of Health, Broadway, New South Wales, Australia
| | - Rajesh Aggarwal
- Palliative Care, Bankstown Hospital, Bankstown, New South Wales, Australia
| | - Davinia Seah
- Palliative Care, St Vincent's Health Australia Ltd, Sydney, New South Wales, Australia
| | - Caitlin Sheehan
- Palliative Care, Calvary Health Care, Kogarah, New South Wales, Australia
| | - Richard Chye
- Palliative Care, St Vincent's Health Australia Ltd, Sydney, New South Wales, Australia
| | - Beverly Noble
- IMPACCT (Improving Palliative, Aged and Chronic Care through Clinical Research and Translation), University of Technology Sydney Faculty of Health, Broadway, New South Wales, Australia
| | - Nikki McCaffrey
- Deakin Health Economics, Deakin University School of Health and Social Development, Burwood, Victoria, Australia
| | - Ghauri Aggarwal
- Concord Centre for Palliative Care, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | - Rachel George
- Pharmacy, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | - Marian Kow
- Pharmacy, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | - Chadi Ayoub
- Cardiology, Mayo Clinic Scottsdale, Scottsdale, Arizona, USA
| | - Anthony Linton
- Concord Cancer Centre, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | | | - Dipti Mittal
- Concord Centre for Palliative Care, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | - Angela Rao
- IMPACCT (Improving Palliative, Aged and Chronic Care through Clinical Research and Translation), University of Technology Sydney Faculty of Health, Broadway, New South Wales, Australia
- Palliative Care, Calvary Health Care, Kogarah, New South Wales, Australia
| | - Grace Prael
- IMPACCT (Improving Palliative, Aged and Chronic Care through Clinical Research and Translation), University of Technology Sydney Faculty of Health, Broadway, New South Wales, Australia
| | - Katalin Urban
- Palliative Care, Northern New South Wales Local Health Network, Lismore, New South Wales, Australia
| | - Priyanka Vandersman
- Research Centre for Palliative Care Death & Dying, Flinders University, Adelaide, South Australia, Australia
| | - Meera Agar
- IMPACCT (Improving Palliative, Aged and Chronic Care through Clinical Research and Translation), University of Technology Sydney Faculty of Health, Broadway, New South Wales, Australia
- Palliative Care, Sydney South West Area Health Service, Liverpool, New South Wales, Australia
| |
Collapse
|
4
|
Chen L, Liao L, Zuo Z, Yan Y, Yang L, Fu Q, Chen Y, Hou J. Simultaneous determination of nikethamide and lidocaine in human blood and cerebrospinal fluid by high performance liquid chromatography. J Pharm Biomed Anal 2007; 43:1757-62. [PMID: 17289323 DOI: 10.1016/j.jpba.2006.12.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2006] [Revised: 11/30/2006] [Accepted: 12/19/2006] [Indexed: 10/23/2022]
Abstract
Nikethamide and lidocaine are often requested to be quantified simultaneously in forensic toxicological analysis. A simple reversed-phase high performance liquid chromatography (RP-HPLC) method has been developed for their simultaneous determination in human blood and cerebrospinal fluid. The method involves simple protein precipitation sample treatment followed by quantification of analytes using HPLC at 263 nm. Analytes were separated on a 5 microm Zorbax Dikema C18 column (150 mm x 4.60 mm, i.d.) with a mobile phase of 22:78 (v/v) mixture of methanol and a diethylamine-acetic acid buffer, pH 4.0. The mean recoveries were between 69.8 and 94.4% for nikethamide and between 78.9 and 97.2% for lidocaine. Limits of detection (LODs) for nikethamide and lidocaine were 0.008 and 0.16 microg/ml in plasma and 0.007 and 0.14 microg/ml in cerebrospinal fluid, respectively. The mean intra-assay and inter-assay coefficients of variation (CVs) for both analytes were less than 9.2 and 10.8%, respectively. The developed method was applied to blood sample analyses in eight forensic cases, where blood concentrations of lidocaine ranged from 0.68 to 34.4 microg/ml and nikethamide ranged from 1.25 to 106.8 microg/ml. In six cases cerebrospinal fluid analysis was requested. The values ranged from 20.3 to 185.6 microg/ml of lidocaine and 8.0 to 72.4 microg/ml of nikethamide. The method is simple and sensitive enough to be used in toxicological analysis for simultaneous determination of nikethamide and lidocaine in blood and cerebrospinal fluid.
Collapse
Affiliation(s)
- Lili Chen
- West China School of Preclinical Medicine and Forensic Medicine, Sichuan University, No. 17, Section 3, Renmin Nan Road, Chengdu 610041, PR China
| | | | | | | | | | | | | | | |
Collapse
|
5
|
Nakayama S, Miyabe M, Kakiuchi Y, Inomata S, Osaka Y, Fukuda T, Kohda Y, Toyooka H. Propofol Does Not Inhibit Lidocaine Metabolism During Epidural Anesthesia. Anesth Analg 2004; 99:1131-1135. [PMID: 15385363 DOI: 10.1213/01.ane.0000131508.39939.86] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Propofol is sometimes used in combination with epidural anesthesia with lidocaine. In this study, we investigated the effect of propofol on the plasma concentration of lidocaine and its principal metabolites during epidural anesthesia with lidocaine. Thirty-two patients were randomly allocated to receive either propofol or sevoflurane anesthesia (n = 16 each). In the propofol group, anesthesia was maintained with a target concentration of propofol of 4 microg/mL. In the sevoflurane group, anesthesia was maintained with 1.5% sevoflurane. Lidocaine was administered epidurally in an initial dose of 5 mg/kg, followed by a continuous infusion at 2.5 mg x kg(-1) x h(-1). Free components of plasma lidocaine and its metabolites-monoethylglycinexylidide (MEGX) and glycinexylidide (GX)-were measured 30, 60, 120, and 180 min after the initiation of continuous epidural injection by using high-performance liquid chromatography. Free lidocaine, MEGX, and GX were separated from 2 mL of plasma by ultrafiltration filter units. Hemodynamic data were similar between groups. The plasma concentrations of free lidocaine were not significantly different between groups. The ratios of free MEGX to free lidocaine and free GX to free MEGX were not different between groups. In conclusion, propofol does not alter the metabolism of epidural lidocaine compared with sevoflurane.
Collapse
Affiliation(s)
- Shin Nakayama
- Departments of *Anesthesiology and †Pharmacy, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan
| | | | | | | | | | | | | | | |
Collapse
|