How sharp is a "sharp scratch"? A mixed methods study of verbal warnings issued before venipuncture

Area of Science:

• Medical Communication
• Pain Management
• Patient Experience

Background:

• Healthcare providers often use verbal warnings before venipuncture.
• Warnings inducing negative expectations can cause the nocebo effect, increasing perceived pain.
• The specific impact of the common "sharp scratch" warning on venipuncture pain is unclear.

Purpose of the Study:

• To investigate the prevalence and patient acceptance of the "sharp scratch" warning before venipuncture.
• To compare the pain experienced by patients hearing "sharp scratch" versus "ready?" before venipuncture.

Main Methods:

• Surveys of healthcare providers and patients assessed warning prevalence, phrasing, and patient preference.
• Adult outpatients were randomized to hear either "sharp scratch" or "ready?" immediately before venipuncture.
• Pain ratings were collected from randomized patients as the primary outcome measure.

Main Results:

• 77% of providers used warnings; 73% used "sharp scratch".
• Most patients found "sharp scratch" acceptable and preferred it to no warning.
• No significant difference in pain scores was observed between the "sharp scratch" and "ready?" groups.

Conclusions:

• "Sharp scratch" is a widely used venipuncture warning that patients generally accept.
• This warning does not appear to influence pain perception compared to a neutral cue.
• Elderly patients may prefer distraction over "sharp scratch" to manage venipuncture discomfort.