The purpose of this study is to evaluate if applying a lidocaine topical solution before wounds treatment decreases the pain of the procedure in comparison with placebo solution.
The manipulation of the wounds for its treatment is a painful process and there is currently no marketed any topical drug to decrease this suffering. The objective of this study is to demonstrate that lidocaine topical solution applied prior to wounds treatment, reduces the pain of the procedure compared to the treatment done after application of placebo solution. In addition, if the process was less painful, the consumption of systemic analgesics would be reduced (or eliminated) and, therefore, also its secondary effects. It is a pilot, single-center clinical trial, prospective, randomised, double-blind, placebo-controlled study that will include 26 patients admitted in Bellvitge University Hospital (HUB) who present painful wound treatments. The Pharmaceutical Department of HUB prepares a dilution of lidocaine 0.5% in 20ml disposable syringes and also identical disposable syringes containing 20ml saline solution (process authorized by the Spanish Agency of Medicines and Sanitary Products). Each patient included will be subject to 6 procedures, randomised according to the sequence of treatment ABABAB or BABABA ("A" is lidocaine solution, "B" is placebo solution), according to a random list. After a doctor of The Pain Department evaluates and includes the patient into the study, prescribes the treatment and the Pharmaceutical Department provides 3 identical syringes (numbered), for each procedure, to the nurse of the patient. The first syringe will contain always saline solution (this is unknown for the patient and the nurse) doing this, the investigators obtain the basal pain of each procedure. The other two syringes contain the studying solution (lidocaine or saline solution, according the sequence of the random list) but always the same solution in both. The doctors of the Pain Department ask the patient about the pain before starting the procedure and determine according the "Verbal numerical scale" (VNS) from 0 to 10 points. The nurse, under sterile conditions, will dampen two sterile gauzes with the solution contained in the syringe 1, and will apply on the wound during 10 minutes before starting the treatment. After this time, the nurse starts the treatment of the wound and the doctor asks again about the pain punctuation on the VNS and register it. All this procedure is repeated with the contain of the syringe 2 and register the punctuation. If the procedure is still painful, the nurse applies (following the same procedure) gauzes with the solution contained in the syringe 3 and the doctor register the VNS punctuation. If even this third application, the treatment is still painful, each patient has prescribed a systemic analgesic to be used at this point if necessary (it does not matter which analgesic, the best for each patient, the only condition is that it can not be modified during the period of inclusion into the study, it is, 6 procedures) and the punctuation in the VNS is also registered. Furthermore, during each procedure, the nurse and the doctor, control the appearance of side effects and 7 days after the last procedure, the doctor contacts to the patient for check the clinical safety. Comparing the procedures carried out after lidocaine solution with saline solution, the investigators will evaluate the reduction of pain in the wounds treatment.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
QUADRUPLE
Enrollment
7
Each of 26 patients will be evaluated during 6 consecutive wound treatments. The nurse will receive 3 syringes for each procedure, the syringe 1 always contains saline solution (blinded to the patient and to the nurse) to register the basal pain; the other two syringes are identical (number 2 and 3) and contain the study drug: lidocaine solution or saline solution. The investigators randomise the patients depending on the administration sequence (ABABAB or BABABA). When the procedure is "A", the nurse will receive the syringes number 2 and 3 containing lidocaine solution to apply (blinded to the nurse, the patient and the doctor). Note: The investigators consider important apply both treatments (lidocaine solution and saline solution) alternatively to avoid the bias that could might fall a cause of wound evolution (to heal or to get worse). And it is important that the same patient receives both treatments to decrease the subjective component in pain perception.
Each of 26 patients will be evaluated during 6 consecutive wound treatments. The nurse will receive 3 syringes for each procedure, the syringe 1 always contains saline solution (blinded to the patient and to the nurse) to register the basal pain; the other two syringes are identical (number 2 and 3) and contain the study drug: lidocaine solution or saline solution. The investigators randomise the patients depending on the administration sequence (ABABAB or BABABA). When the procedure is "B", the nurse will receive the syringes number 2 and 3 containing saline solution to apply (blinded to the nurse, the patient and the doctor). Note: The investigators consider important apply both treatments (lidocaine solution and saline solution) alternatively to avoid the bias that could might fall a cause of wound evolution (to heal or to get worse). And it is important that the same patient receives both treatments to decrease the subjective component in pain perception.
Hospital Universitari de Bellvitge
L'Hospitalet de Llobregat, Barcelone, Spain
Register the VNS punctuation during wound treatments to demonstrate pain reduction (less VNS punctuation) when lidocaine solution has been administrated comparing to placebo.
The doctor asks to the patient about the punctuation on the VNS before touching the wound and when the wound treatment starts, it is, 10 minutes later than the dampen gauzes (with the syringe 1 content) has been applied on the wound and the VNS punctuation is registered. The nurse does the same procedure with the syringe 2 content and the VNS punctuation is registered. The syringe 3 content is only applied if the procedure is still painful, and the VNS punctuation is also registered. This process is done during 6 consecutive wound treatments for each patient. The time frame is up to 19 days because it depends on the need of treatment of each patient: every 24, 48 or 72 hours. At the end of the study, the investigators, will compare the punctuation registered when lidocaine solution has been administrated with the procedures realized when placebo solution was administrated, to demonstrate if the procedure is less painful (less VNS punctuation) when lidocaine solution was applied.
Time frame: The assessment is done six times (one for each wound treatment). The time frame ranges from the date of randomization to the date than the sixth wound treatment has been done; it is up to 19 days.
Register if systemic analgesics are required after the third syringe content application and compare if it decreases when lidocaine solution has been applied comparing to placebo.
If the wound treatment is still painful after application the dampen gauzes with the third syringe content, each patient has prescribed a systemic analgesic to decrease the pain. It does not matter which analgesic, the only condition is that it can not be modified during the period of inclusion into the study, it is 6 consecutive wound treatments. The time frame is up to 19 days because it depends on the need of treatment of each patient: every 24, 48 or 72 hours. The need of the systemic analgesic to decrease the pain, in spite of the topical solution contained in the three syringes, it is registered for each wound treatment. At the end of the study, the investigators, will assess the requirements of systemic analgesics and if it exists any relation with lidocaine solution or placebo solution.
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Time frame: The assessment is done six times (one for each wound treatment). The time frame ranges from the date of randomization to the date than the sixth wound treatment has been done; it is up to 19 days.
Register the efficacy (decrease VNS punctuation) of systemic analgesics when it has been required during the wound treatment.
If the wound treatment is still painful after application the dampen gauzes with the third syringe content, each patient has prescribed a systemic analgesic to decrease the pain. It does not matter which analgesic, the only condition is that it can not be modified during the period of inclusion into the study, it is 6 consecutive wound treatments. The time frame is up to 19 days because it depends on the need of treatment of each patient: every 24, 48 or 72 hours. The VNS punctuation before and after systemic analgesic administration is registered. At the end of the study, the investigators will assess the efficacy (decrease VNS punctuation) of systemic analgesic comparing the VNS punctuation registered before and after the administration.
Time frame: The assessment is done six times (one for each wound treatment). The time frame ranges from the date of randomization to the date than the sixth wound treatment has been done; it is up to 19 days.
Register the requirements of systemic analgesics at 60 minutes after each procedure and compare if it decreases when lidocaine solution has been applied comparing to placebo.
At Bellvitge University Hospital, the treatment prescription and administration has an electronic registration so, the investigators have the timing of administration registered at the computer. The investigators will compare if the need of systemic analgesics decrease (need of administration or not need of administration) at 60 minutes after the procedure when lidocaine solution has been applied during the procedure comparing when placebo has been administrated.
Time frame: The assessment is done six times (60 minutes after each wound treatment). The time frame ranges from the date of randomization to the date than the sixth wound treatment has been done; it is up to 19 days.
Register the number of doses of rescue systemic analgesics during the next 24 hours after each procedure and compare if it decreases when lidocaine solution has been applied comparing to placebo.
All the patients have prescribed a fixed systemic analgesia and rescue systemic analgesia (only administrated if the patient has pain). At Bellvitge University Hospital, the treatment prescription and administration has an electronic registration so, the investigators have the drug, the dose, the route of administration (all this invariable during the patient is included into the study) and the timing registered at the computer. The investigators will compare if the needs (number of doses) of rescue systemic analgesics decrease during the next 24 hours when lidocaine solution has been applied during the procedure comparing when placebo has been administrated.
Time frame: The assessment is done six times (during the next 24h after each wound treatment). The time frame ranges from the date of randomization to the day after than the sixth wound treatment has been done; it is up to 20 days.
Register the number of applications that it is necessary to decrease the pain (less punctuation in VNS) during the wound treatment procedure (it is: 1 or 2 applications).
The content of the syringes 1 and 2 will be always applied (the number 1 contains always saline solution to register the basal pain, and the syringe 2 is the study drug: lidocaine solution or saline solution, according to the random list) and the VNS punctuation is registered after both applications. If the procedure is still painful after the content of the syringe 2 application, the content of the syringe 3 is applied (it is always the same study drug that contents the syringe 2 for each procedure) and it is registered as well as the VNS punctuation given by the patient. At the end of the study, the investigators will determine how many times it has been necessary to apply the third syringe to reduce the pain (less punctuation given in the VNS) and, doing this, determinate if it is necessary one or two applications of the study drug to reduce the pain.
Time frame: The assessment is done six times (one for each wound treatment). The time frame ranges from the date of randomization to the date than the sixth wound treatment has been done; it is up to 19 days.
Register if any side effects is detected.
Registering if any side effect (local or systemic) appears during the procedures and comparing if any relation exists with lidocaine solution. Seven days after the sixth procedure has been done, the investigators will contact with the patient to take care that any side effects has been detected.
Time frame: The assessment is done six times (one for each wound treatment). The time frame ranges from the date of randomization to 7 days after the sixth wound treatment has been done; it is up to 26 days.