At a glance
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Microvascular Function in Patients Undergoing 5-Fluorouracil Chemotherapy
In Brief
An observational study evaluating Arterial blood pressure, Skin microcirculatory blood flow, and 2 other interventions for Gastrointestinal Cancer and 4 related conditions. Completed, enrolled 62 participants across 1 site.
Detailed Summary
The primary aim of this study is to investigate potential differences in vascular function between patients receiving 5-Fluorouracil (5-FU) chemotherapy, patients receiving chemotherapies other than 5-FU, cancer survivors who were treated with 5-FU, and an age and sex matched control. 5-FU is the third most commonly administered chemotherapeutic agent and its use is associated with the second most occurrences of cardiotoxicity. Despite the known cardiotoxic effects of 5-FU, it's effects on the human vasculature are not well understood. To achieve the goals of this project Laser Doppler flowmetry (LDF) will be used to assess blood flow within the skin microcirculation of the forearm in cancer patients who have received 5-Fluoruracil within the past 30 days (Experimental Group), cancer patients receiving radiotherapy and/or chemotherapy other than 5-Fluorouracil, and an age and sex matched control (Control Group). LDF utilizes a small (\~3 cm) non-invasive sensor placed on the skin. The sensor shines light into the skin, and upon contact with red blood cells (RBCs), the light is reflected and scattered. This information is used to evaluate microvascular blood flow and has previously been used in clinical populations.
Study Details
Timeline
Interventions
Measured using an automated non-invasive finger cuff that obtains beat-by-beat blood pressure measurements via finger photoplesmography. Briefly, changes in artery diameter are detected through infrared light in the finger cuff. (Finometer Pro, FMS, The Netherlands).
Assessed non-invasively in the forearm skin via Laser Doppler flowmetry in response to locally delivered acetylcholine and norepinepherine or phenylepherine via iontophoresis.
A GE Ultrasound System will be used to non-invasively assess brachial artery blood flow prior to and following a standard flow mediated dilation protocol.
A venous blood sample from the antecubital vein or a vein in the back of the hand will be taken via venipuncure by a nurse or a certified phlebotomist at the beginning of the experimental visit. These blood samples will be analyzed for the presence of reactive oxygen species and inflammatory markers.