Subcutaneous Nitroglycerin to Facilitate Trans-radial Access. (NITRAD-Sub)
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|ClinicalTrials.gov Identifier: NCT03304496|
Recruitment Status : Recruiting
First Posted : October 9, 2017
Last Update Posted : October 9, 2017
|Condition or disease||Intervention/treatment||Phase|
|Coronary Artery Disease||Drug: Nitroglycerin 100 MCG/ML Injectable Solution Drug: Saline Solution||Phase 4|
Unlike femoral access, the trans-radial approach to coronary angiography requires a greater learning curve for the inexperienced interventionist, and demands a greater technical challenge than the femoral approach, which leads to a high incidence of failures and complications, mainly in the initial stages of their formation. Some explanations for procedural failure include inability for radial artery puncture, vessel tortuosity, and radial spasm. Radial spasm has been reported from 5 to 30% in experienced centers, with a decrease to 2.5% when associated with the administration of nitrate added to local anesthesia. Although radial spasm is infrequent and usually occurs once the artery is cannulated or during manipulation of the catheters, it can sometimes occur before cannulation due to multiple unsuccessful attempts to cannulate the artery, which can also produce pain in the patient.
The investigators will conduct an experimental, placebo-controlled, longitudinal, prospective, double-blind, parallel arm clinical trial. Patients will be randomized to receive 1:1 an intervention or placebo. Intervention group will receive a subcutaneous "cocktail" with 0.5 ml of 500 mcg of nitroglycerin + 1 ml of 2% simple lidocaine. Placebo group will receive a subcutaneous injection with 0.5 ml of 0.9% saline solution + 1 ml of 2% simple lidocaine.
The investigators hypothesize that the maneuver (subcutaneous infiltration of local anesthetic together with nitroglycerin) will facilitate radial access in terms of fewer punctures until the insertion of the arterial introducer, shorter access time, lower incidence of radial spasm, and lower crossover rate to femoral access, compared with placebo. In terms of safety, the investigators do not believe that the maneuver represents a risk to the patient in terms of incidence of hypotension or headache. In fact, the investigators believe that the maneuver will provide less pain at the site of puncture referred by the patient due to the less number of unsuccessful punctures.
For the calculation of the required sample, since the incidence of our primary end-point of a compound of crossover to femoral access and/or access site-related vascular complications has not been reported so far, the sample will be calculated with the rate of events obtained in our center at 6 months of recruiting patients. For this calculation, the proportional difference formula with an alpha value of 0,05 and a beta value of 0,20 will be used to have a statistical power of 80%. The investigators estimate that 1,500 patients will be required in a 11-month period.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||1400 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Triple (Participant, Care Provider, Outcomes Assessor)|
|Primary Purpose:||Supportive Care|
|Official Title:||Subcutaneous Administration of Nitroglycerin to Facilitate Trans-radial Access in Coronary Procedures: a Randomized Clinical Trial (NITRAD-Sub Study).|
|Actual Study Start Date :||March 30, 2017|
|Estimated Primary Completion Date :||February 28, 2018|
|Estimated Study Completion Date :||April 15, 2018|
The intervention group will receive a subcutaneous "cocktail" with 0,5 ml of 500 mcg of nitroglycerin + 1 ml of 2% simple lidocaine.
Drug: Nitroglycerin 100 MCG/ML Injectable Solution
Placebo Comparator: Control
The placebo group will receive a subcutaneous injection with 0,5 ml of 0,9% saline solution + 1 ml of 2% simple lidocaine.
Drug: Saline Solution
- Compound of crossover to femoral access and/or access site-related vascular complications. [ Time Frame: Within 72 hours or at hospital discharge (whichever occurs first). ]Crossover to femoral access: number of cases in which the procedure could not be completed via radial artery and access via femoral artery was changed. Access site-related vascular complications: hematoma requiring intervention as an additional compression bandage, radial perforation / dissection, hemorrhage requiring transfusion, compartment syndrome, arteriovenous fistula, pseudoaneurysm, or any complication requiring surgical intervention.
- Number of attempts to cannulate the radial artery (punctures). [ Time Frame: Through study completion, an average of 1 year. ]Number of times the needle is inserted through the skin with the intention of puncturing the radial artery. This outcome measure will be assessed by interventional cardiology fellow who applies the maneuver and attempt to cannulate the artery.
- Time until obtaining the radial access. [ Time Frame: Through study completion, an average of 1 year. ]Counted from the first attempt to puncture the radial artery, from the needle through the skin to the successful insertion of the introducer into the radial artery with adequate blood return.
- Improvement in radial pulse strength. [ Time Frame: Through study completion, an average of 1 year. ]The interventional cardiologist fellow who will apply the maneuver, will assess the strength of the radial pulse before the administration of the maneuver and at least 1 minute after, and will record the change in pulse strength. Pulse Score: 0 - No palpable pulse. 1 - Weak pulse. 2 - Pulse of normal intensity. 3 - Very intense pulse.
- Loss of radial artery flow (radial artery occlusion) at 30 days. [ Time Frame: At 30 days. ]The maximum longitudinal and transverse diameter of the radial artery and the maximum arterial flow velocity will be measured, with the transducer placed 1 cm proximal to the styloid process using ultrasound doppler with a vascular transducer.
- Pain in the cannulated extremity. [ Time Frame: Through study completion, an average of 1 year. ]It will be evaluated with a visual-analogue subjective pain scale from 1 to 10 referred by the patient. Pain will be assessed at the time of introducing the radial introducer.
- Radial spasm. [ Time Frame: During coronary procedure. ]It will be referred to as radial spasm if the patient reports pain or discomfort of any intensity at the cannulated end, at the time of manipulating, advancing and / or withdrawing any catheter through the arterial introducer. Angiographic confirmation of spasm may or may not be done. Additional intra-arterial vasodilators, or additional IV analgesics, may or may not be administered at the discretion of the operator.
- Headache. [ Time Frame: During coronary procedure. ]Referred by the patient during any time of the procedure in the hemodynamic laboratory. It will be recorded on a subjective-to-analogue subjective pain scale from 1 to 10.
- Hypotension. [ Time Frame: In the following 10 minutes after administration of the maneuver. ]Systolic blood pressure lower than 90 mmHg in the following 10 minutes after the maneuver, not related to the manipulation of a coronary artery with any device.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03304496
|Contact: Daniel Coutiño-Castelán, MD, MScemail@example.com|
|Instituto Nacional de Cardiologia Ignacio Chavez||Recruiting|
|Mexico City, Tlalpan, Mexico, 04480|
|Contact: Julio Sandoval Zarate, MD firstname.lastname@example.org|
|Study Director:||Marco Antonio Peña Duque, MD||Director of Department of Interventional Cardiology, National Institute of Cardiology, Mexico City, Mexico.|