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Comparison of Pain During Venous Cannulation Using 18G and 20G Needles in Patients Undergoing Surgery at Cotia Hospital

Comparison of pain between 18 and 20 gauge cannulas in patients undergoing elective surgeries at the Regional Hospital of Cotia

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
REBEC
Registry ID
RBR-44kxq3t
Enrollment
170
Registered
2026-06-15
Start date
2025-08-06
Completion date
Unknown
Last updated
2026-06-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Procedural Pain Acute Pain

Interventions

This is a randomized controlled non-inferiority clinical trial with two arms, single-blind, with a total of 170 participants, 85 allocated to the intervention group receiving peripheral venous cannula

Sponsors

Serviço Social da Construção Civil do Estado de São Paulo
Lead Sponsor
Serviço Social da Construção Civil do Estado de São Paulo
Collaborator

Eligibility

Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: Patients undergoing elective surgery at Hospital Regional de Cotia; of both sexes; with a minimum age of 18 years

Exclusion criteria

Exclusion criteria: Patients under 18 years of age. Patients with difficulty effectively communicating pain intensity due to cognitive impairment, altered mental status, or visual and/or language limitations. Previous venipunctures performed before arrival at the surgical center. Patients without suitable veins on the dorsum of the hand. Patients in whom the specialist judges there to be technical difficulty or impossibility for cannulation in the allocated group. Healthcare professionals who may distinguish catheter gauge by the color and/or size of the catheter

Design outcomes

Primary

MeasureTime frame
It is expected to evaluate pain intensity immediately after peripheral venous cannulation in participants undergoing cannulation with 18-gauge and 20-gauge catheters, assessed using the Numerical Verbal Scale immediately after the procedure. Sample size calculation was performed considering an expected mean of 2.7 points, a non-inferiority margin of 0.81, statistical power of 90%, and a significance level of 5%, and differences between groups will be evaluated using the Two One-Sided Tests method, Bayesian analysis, intention-to-treat analysis, per-protocol analysis, and Complier Average Causal Effect analysis to determine the effect of the intervention

Secondary

MeasureTime frame
It is expected to evaluate the success rate of peripheral venous puncture on the first attempt in participants undergoing puncture with 18G and 20G catheters, verified through direct observation of the procedure. The frequencies and percentages of first-attempt success between the groups will be observed.and the data will be analyzed using the chi-square test, Fisher’s exact test, Shapiro-Wilk test, and Mann-Whitney test.;It is expected to evaluate the difficulty of peripheral venous puncture in participants undergoing puncture with 18G and 20G catheters, verified through the application of a Likert-type scale. The frequencies and percentages of punctures classified as easy, moderate, or difficult between the groups will be observed and the data will be analyzed using the chi-square test, Fisher’s exact test, Shapiro-Wilk test, and Mann-Whitney test.;It is expected to evaluate the occurrence of hematoma related to peripheral venous puncture in participants undergoing puncture with 18G and 20G catheters, verified through direct observation of the puncture site. The frequencies and percentages of hematoma occurrence between the groups will be observed and the data will be analyzed using the chi-square test, Fisher’s exact test, Shapiro-Wilk test, and Mann-Whitney test.;It is expected to evaluate the occurrence of infiltration related to peripheral venous puncture in participants undergoing puncture with 18G and 20G catheters, verified through direct observation of the procedure and puncture site. The frequencies and percentages of infiltration occurrence between the groups will be observed e and the data will be analyzed using the chi-square test, Fisher’s exact test, Shapiro-Wilk test, and Mann-Whitney test.;It is expected to evaluate the occurrence of extravasation related to peripheral venous puncture in participants undergoing puncture with 18G and 20G catheters, verified through direct observation of the puncture site. The frequencies and percentages of extravasa

Countries

BR

Contacts

Public ContactPedro Carvalho

Serviço Social da Construção Civil do Estado de São Paulo

pedrociceroo@gmail.com+55-11-3664-5900

Outcome results

None listed

Source: REBEC (via WHO ICTRP) · Data processed: Jun 29, 2026