Introduction
Peripheral venous catheterization (PVC) is the most common invasive procedure in
healthcare worldwide. Improving the success rate of PVC on the first attempt is crucial
for patients, as it impacts pain, anxiety, the risk of extravasation, rapid access to
care, and the patient-provider relationship. For healthcare providers, a higher success
rate enhances self-confidence and autonomy, while institutions benefit from improved
reputation and reduced costs.
In the Poitiers hosptial, one in ten catheters is used in imaging services, with CT scan
departments accounting for 66.3% of catheter usage due to iodinated contrast injections.
Literature suggests two techniques to enhance PVC success: ultrasound-guided and infrared
illumination methods. These techniques appear effective primarily for patients with
difficult venous access. Additionally, the A-DIVA clinical score has been developed to
predict first-attempt success rates. However, no studies in Europe have compared the
effectiveness of these two techniques in imaging settings or based on the A-DIVA score.
This study aims to identify the most effective technique for PVC in patients with
difficult venous access.
Objectives
Compare the proportion of successful PVCs on the first attempt among the classical method
(Gold Standard), ultrasound-guided technique, and infrared illumination technique in
adult patients with difficult venous access.
Compare the proportion of successful PVCs on the second attempt (if the first attempt
fails) among the three techniques.
Compare the total number of attempts required for successful PVC. Evaluate the maximum
pain experienced by patients during successful PVC. Assess overall patient satisfaction
following successful PVC. Evaluate operator satisfaction with the procedure. Measure the
time taken for catheterization from material preparation to successful catheter
placement.
Analyze the fallback strategies chosen by operators after a failed attempt (e.g., calling
a colleague, continuing with the classical method, using ultrasound guidance, infrared
illumination, or abandoning the procedure).
Describe the catheter sizes chosen by operators based on the A-DIVA score and the number
of failed attempts.
Methodology
This is a prospective, controlled, randomized, three-arm, single-center, superiority
trial involving patients with difficult venous access. Inclusion criteria include:
Patients aged 18 years or older. Patients scheduled for a CT scan requiring PVC. Patients
with an A-DIVA score of 2 or higher. Patients capable and willing to comply with study
procedures. Patients covered by social security or through a third party. Patients
providing written informed consent after receiving clear information about the study.
Exclusion criteria include:
Patients with contraindications for PVC (e.g., presence of an arteriovenous fistula,
orthopedic or vascular prosthesis, history of mastectomy, etc.).
Patients with contraindications for iodinated contrast injection as defined by the French
Society of Radiology.
Patients already included in the study. Vulnerable populations (e.g., minors, pregnant or
breastfeeding women, individuals deprived of liberty).
Intervention Groups
Control: Classical method based on clinical examination (visualization and palpation).
Experimental: Ultrasound-guided method. Experimental: Infrared illumination method.
Sample Size and Duration
A total of 249 patients will be enrolled, with 82 patients in each group. The inclusion
period will last 12 months, and each participant will be involved for a maximum of 4
hours. The total duration of the clinical investigation will be 1 year and 4 hours.
Outcome Measures
The primary outcome is the proportion of successful PVCs on the first attempt, defined as
the administration of 5 ml of NaCl without reported pain or visible edema.
The total number of skin penetrations by the catheter will be recorded. Maximum pain will
be assessed using a numerical rating scale (0-10). Patient satisfaction will be measured
using a similar numerical scale. Operator satisfaction will also be evaluated on a scale
from 0 (very dissatisfied) to 10 (very satisfied).
Time for catheterization will be recorded in minutes, starting from the preparation of
the PVC tray until successful catheter placement.
The fallback strategy after a failed attempt will be documented. The size of the catheter
chosen for each attempt will be recorded. Statistical Analysis
The primary outcome will be compared among the three groups using ANOVA, followed by
pairwise comparisons using Tukey's test if significant differences are found.
Expected Outcomes
Identifying the most effective PVC technique could increase the likelihood of
first-attempt success in adults with difficult venous access.
Benefits for Patients
Reduced pain and discomfort from multiple attempts. Decreased risk of infection and
extravasation. Maintenance of venous integrity. Sustained trust in the patient-provider
relationship.