ORIGINAL ARTICLE
How Sharp is a “Sharp Scratch”? A Mixed
Methods Study of Verbal Warnings Issued
Before Venipuncture
Roshan Vijayan, MBBS*; Gregory Scott, MBBS
†
; Wendi Brownlie, NZCS*;
Pandora Male, BSc
†
; Kian Chin, MBChB*
*Milton Keynes Hospital NHS Foundation Trust, Milton Keynes, U.K.;
†
Imperial College School
of Medicine, London, U.K.
& Abstract
Objectives: Health care providers frequently issue a verbal
warning before venipuncture. Communications that induce
negative expectations in patients can lead to the “nocebo”
response, defined as experiencing greater pain. But is this
also true for “sharp scratch”?
Methods: The study was conducted across 4 U.K. hospitals.
Two separate surveys of health care providers and patients
explored the prevalence, phraseology, rationale, and reac-
tion to verbal warnings before venipuncture. Blinded adult
patients already attending an outpatient department during
a 2-week period were randomized to hearing a “sharp
scratch” or the verbal cue “ready?” immediately before
venipuncture. They were also asked to rate their pain (the
primary outcome).
Results: 77% of 117 health care providers surveyed issued a
verbal warning before venipuncture; 73% used “sharp
scratch”. Of 62 patients surveyed, 56% agreed that “sharp
scratch” accurately describes venipuncture, and 64% agreed
that they prefer “sharp scratch” to no warning. With
increasing age, a preference came for an alternative warning
to “sharp scratch” (P = 0.039) and to be distracted by
conversation (P = 0.002). Of 192 patients in the randomized
study, there was no difference in pain between the “sharp
scratch” and “ready” groups. The numeric rating scores were
0.74 SD 1.06 vs. 0.88 SD 1.18, respectively. (P = 0.493).
Conclusions: Most health care providers use the verbal
warning “sharp scratch” before venipuncture. Most patients
find this acceptable and prefer it to no warning. An exception
may be elderly patients, who may prefer to be distracted by
conversation. “Sharp scratch” makes no difference to the
pain experienced compared with a verbal cue. &
Key Words: pain, pain acute, pain psychological variables
INTRODUCTION
Venipuncture is the most common invasive medical
procedure
1
performed by a variety of health care
providers including doctors, nurses, and phlebotomists.
It may be a source of significant distress to patients;
therefore, it is desirable for clinicians to minimize
anxiety and pain engendered by the procedure. The
phrase “sharp scratch” is frequently used as a verbal
warning to patients immediately before needle insertion.
But what is the rationale for such a warning? Warning
patients of pain well in advance of needle-related
procedures may increase their experience of pain
2–6
.
Little is known, however, as to whether this is true for a
commonly used verbal warning such as “sharp scratch”
issued immediately before needle insertion, despite such
warnings being routinely employed in clinical practice
in the United Kingdom. While the World Health
Address Correspondence and reprint requests to: Roshan Vijayan,
MBBS, Department of Plastic Surgery, Queen Victoria Hospital, Holtye
Road, East Grinstead, RH19 3DU, U.K. E-mail: roshan.vijayan@gmail.com.
Submitted: May 23, 2013; Revision accepted: October 16, 2013
DOI. 10.1111/papr.12159
© 2013 World Institute of Pain, 1530-7085/15/$15.00
Pain Practice, Volume 15, Issue 2, 2015 132–139