Key result
The Valsalva maneuver significantly reduced pain severity during IV cannulation compared to the usual procedure (mean NRS 2.75 vs 4.86; P≤0.05).
Why the study?
Does the Valsalva maneuver reduce pain intensity and hemodynamic changes during IV cannulation in patients scheduled for elective surgery?
RCT (n=80)
Randomly assigned
No
Does the Valsalva maneuver reduce pain intensity and hemodynamic changes during IV cannulation in patients scheduled for elective surgery?
Absolute Event Rate: 2.75% vs 4.86%
p-value: p=≤0.05
The Valsalva maneuver is an effective, non-pharmacological method to reduce pain during IV cannulation without causing significant hemodynamic changes.
Supports Valsalva maneuver as a simple non-pharmacological option for IV cannulation pain; confirms RCT efficacy in elective surgery patients.
Background & Aims: Venous cannulation is a painful and stressful methodin health care sitting that various medical and non pharmacological methods are used in to reduce its pain. This study was conducted to investigate the effect of Valsalva maneuver on pain intensity and hemodynamic changes during IV cannulation. Materials & Methods: In a clinical trial, 80 patients scheduled for elective surgery who were admitted to surgical wards,in Hazrat Rasol (Javanroud 2016) were studied. Convenience Sampling was used and assignment to two groups was randomly. In Valsalva group (blowing the plastic tube connected to a mercury sphygmomanometer and raising the mercury column up to 20 mm Hg for at least 20 seconds) 39 patients and 38 patients in control group (usual procedure) cannula was inserted on the back of the non-dominant hand. The pain intensity was measured by a Numerical Rating Scale (NRS). Hemodynamic responses to pain were measured by controlling blood pressure, heart rate and arterial blood oxygen saturation five minutes before and immediately after cannulation. The data was analyzed with chi-square tests, ANOVA, Tukey, Kruskal-Wallis and Mann-Whitney tests using SPSS software (version 16). Results: The Mean NRS in Valsalva group was 2/75 ± 1095 and in control group was 4.86 ± 2.30, which showed a significant decrease in pain severity (P≤0.05) The heart rate decreased from (80.53 ± 14.71) to (77 ± 13.36) after cannulation in the control group (P≤0/05). While other hemodynamic variables did not show significant difference. Conclusion: The Valsalva maneuver is a non-pharmacological method that can be easily performed and reduces cannulation pain without making hemodynamic changes.
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Babaei et al. (2017) conducted an RCT in Elective surgery requiring IV cannulation (n=80). Valsalva maneuver vs. Usual procedure was evaluated on Pain intensity measured by a Numerical Rating Scale (NRS) (p=≤0.05). The Valsalva maneuver significantly reduced pain severity during IV cannulation compared to the usual procedure (mean NRS 2.75 vs 4.86; P≤0.05).
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