ClinicalTrials.gg
CompletedNCT05495542Updated Aug 10, 2022

The Effect of ShotBlocker on Injection Pain

An interventional study of ShotBlocker in Pain and Intramuscular Injection, sponsored by Bornova No. 25 Mevlana Family Health Center. Completed at 1 site in Turkey. Open to female participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-08-10.

Sponsored by Bornova No. 25 Mevlana Family Health Center · Not applicable, Interventional, and Supportive care

From the registry’s dates

  • Registered 3 years 9 months after the study started (first participant enrolled Nov 2018, registered Aug 2022).
Phase
Not applicable
Study type
Interventional
Enrollment
146
Allocation
Randomized
Ages
18 Years and older
Sex
Female
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 1,712 studies in Pain with a site in Turkey — 322 open to participants now, 372 under way, none of them phase 3. Pain · Turkey.

Enrollment
98th of 1,489
146 · median 70
Started
2018
with 80 others
No phase
1,447 of 1,712
260 open now
Registered
483rd of 1,712
by date

Among the 1,712 studies in Pain with a site in Turkey, this one is the 98th largest by enrollment of the 1,489 interventional ones that give a count, is one of 81 that started in 2018, is one of 1,447 with no phase, and was the 483rd registered.

Pain

10,054 studies on the registry are indexed under Pain; 1,649 are open to participants now.

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Open to participants now

322 of the 1,712 studies in Pain with a site in Turkey are open now. Recruiting first, the newest first:

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All 322 open studies →

A study can be open while its sites in Turkey have not opened yet or have stopped. Only those recruiting at a site in Turkey →

Who these studies take

Of the 929 Pain studies recruiting now, 384 (41%) set no upper age limit and 434 (47%) stop at 75 or younger; 146 take children under 18; 222 take healthy volunteers.

This study: 18 Years and older · female · healthy volunteers too.

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02

Study summary

Shotblocker is an effective approach to reduce injection pain. Generally, injection pain has been studied in children, but reducing injection pain in adults is an important issue. This study investigates the effect of ShotBlocker on pain and satisfaction levels associated with diphtheria-tetanus vaccination in pregnant women.

The sample of this prospective, single-blind randomized controlled experimental study consists of 146 pregnant women registered to the Family Health Center between October 2018 and June 2019. Women were assigned to ShotBlocker and control groups with 73 women in each group. The women's pulse rate was taken one minute before the injection by the researcher. In the ShotBlocker group was used ShotBlocker. The control group used the steps of administering a normal intramuscular injection. The pain and satisfaction related to the injection were evaluated using the Visual Analog Scale and Visual Patient Satisfaction Scale after the vaccination. Pulse rates of the women were taken again by the researcher one minute after the injection.

Read the detailed description

As the rate of vaccination increases, preventable diseases and their negative effects decrease; Nevertheless, the significance of vaccine-related side effects is increasing. The most prevalent complications in vaccine applications are local reactions such as pain, swelling, and erythema at the injection site. The most frequent pain in these reactions develops after diphtheria-tetanus vaccine in which aluminum is used as an adjuvant. Diphtheria-tetanus vaccine is generally administered to the deltoid region by intramuscular injection (IM), and most pregnant women complain about the pain that they experience during and after administration of diphtheria-tetanus vaccine. Nurses have a great responsibility in reducing and eliminating the pain felt by patients during operations. The success of pain management is related to nurses' knowledge and skills. If the pain that an individual will feel due to the piercing of the skin with a needle during intramuscular injection application is decreased or reduced to minimum, the anxiety and fear that the person will experience may abate. Therefore, to reduce pain and anxiety in individuals during injection; nurses use many non-pharmacological methods. ShotBlocker (Bionix, Toledo, OH) is one of the methods that can be used to reduce pain caused by IM injections. This small, flat, U-shaped plastic device used by holding it on the skin surface during injection did not have any side effects. ShotBlocker has a surface of 2 mm thick with rounded nubs to stimulate the skin. The surface of the plastic device is placed on the skin just before the injection; there is a hole in the center where the injection is administered. The rounded nubs on the surface of the plastic device do not damage the skin, these rounded nubs that create a slight pressure provide a warning for the Gate Control Theory. ShotBlocker's mechanism of action is thought to reduce pain by stimulating nerve endings faster with pressure of rounded nubs on the device. This stimulation decreases pain by blocking pain signals temporarily during injections and by inhibiting the central nervous system.

03

Conditions studied

  • Pain
  • Intramuscular Injection

Keywords

  • diphtheria-tetanus vaccine
  • intramuscular injection
  • pain
  • pain management
  • patient satisfaction
  • pregnant woman
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Able to speak and understand Turkish
  • Those who volunteered to participate in the study and received written consent
  • 18 years old and over
  • Those with tetanus+diphtheria vaccination prescription/demand
  • No vision-hearing-speech problems
  • No secondary cause of acute pain other than intramuscular injection.
  • Pregnant women who do not have a physical disability (burn, absence or amputation of an extremity, contracture, tissue necrosis, etc.) for injection into the deltoid muscle.

Exclusion criteria

Exclusion Criteria:

  • Pregnant women who cannot speak Turkish
  • Younger than 18
  • Pregnant women who do not want to participate in the study
05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
146 participants (actual)

Study arms

  • Experimental
    Shotblocker group

    In the ShotBlocker group, ShotBlocker was placed on the previously determined injection site before vaccination, and the vaccination was performed by holding it on the surface of the skin and pressing lightly with the fingertips. All vaccinations were carried out by an experienced nurse. ShotBlocker was removed after removing the needle.

    Other: ShotBlocker

  • No intervention
    Control group

    In the control group, the steps of administering a normal intramuscular injection were used. Except for this, no additional method was used. All vaccinations were carried out by an experienced nurse.

Interventions

  • OtherShotBlocker

    ShotBlocker (Bionix, Toledo, OH) is one of the methods that can be used to reduce pain caused by IM injections. This small, flat, U-shaped plastic device used by holding it on the skin surface during injection did not have any side effects \[5\]. ShotBlocker has a surface of 2 mm thick with rounded nubs to stimulate the skin (Figure 1). The surface of the plastic device is placed on the skin just before the injection; there is a hole in the center where the injection is administered \[6\]. The rounded nubs on the surface of the plastic device do not damage the skin, these rounded nubs that create a slight pressure provide a warning for the Gate Control Theory \[7\]

06

What researchers measure

Primary outcomes

  1. Visual analog scale

    The VAS is used to assess the severity of acute pain. It is mostly a horizontal or vertical line 100 mm long, starting with "no pain" and ending with "unbearable pain". It is used to convert some values that cannot be measured numerically to a numerically usable form \[10\].

    Time frame: 6 month

Secondary outcomes

  1. Visual patient satisfaction scale

    The visual patient satisfaction scale combines the characteristics of the well-known VAS. At one end of the scale is the phrase "I am not satisfied at all", and at the other end is the phrase "I am very satisfied".

    Time frame: 6 month

07

Study locations

1 site
  • Merve
    Izmir, Bornova 35100, Turkey
08

References and documents

Publications

  • Drago LA, Singh SB, Douglass-Bright A, Yiadom MY, Baumann BM. Efficacy of ShotBlocker in reducing pediatric pain associated with intramuscular injections. Am J Emerg Med. 2009 Jun;27(5):536-43. doi: 10.1016/j.ajem.2008.04.011. PubMed 19497458 ↗
  • Romano CL, Cecca E. A new method to reduce pin-prick pain of intra-muscular and subcutaneous injections. Minerva Anestesiol. 2005 Oct;71(10):609-15. English, Italian. PubMed 16163151 ↗
  • Cobb JE, Cohen LL. A randomized controlled trial of the ShotBlocker for children's immunization distress. Clin J Pain. 2009 Nov-Dec;25(9):790-6. doi: 10.1097/AJP.0b013e3181af1324. PubMed 19851160 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Nov 2018 to primary completion in Nov 2018, 0 months.

Of 3,731 non-industry interventional studies with no phase under Pain, half reached primary completion within 10 months of starting (the median), counting those still running; a quarter within 4 and three quarters within 23. This study's 0 months is below that.

Counting every sponsor, half of 3,830 studies reached it within 10 months; a quarter within 4 and three quarters within 23.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 5, 2022
First posted
Aug 10, 2022
StartActual
Nov 1, 2018
Primary completionActual
Nov 1, 2018
CompletionActual
May 30, 2019
Last update
Aug 10, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 10, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05495542
Lead sponsor
Bornova No. 25 Mevlana Family Health Center
Responsible party
Merve Ince (Research Assistant, Ege University) — Principal investigator
First posted
Aug 10, 2022
Start date
Nov 1, 2018
Primary completion
Nov 1, 2018
Completion
May 30, 2019
Last update
Aug 10, 2022

Study contacts

Leyla KHORSHID, Professor
principal investigator · khorshidleyla@gmail.com

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Aug 2022. You cannot join it, but the record below documents what was studied.

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