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Applying Num Vapocoolant Spray to Cervix Before Paracervical Block to Decrease Pain During Gynecology Procedures

Vapocoolant Application for Pain Reduction During Office-based Gynecologic Procedures: a Randomized Controlled Trial (VAPOR)

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06227052
Acronym
VAPOR
Enrollment
98
Registered
2024-01-26
Start date
2024-02-05
Completion date
2025-03-07
Last updated
2025-09-25

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

Conditions

Pain With Paracervical Block, Pain With Gynecology Procedure, Pain

Keywords

Pain with Paracervical Block, Pain with Gynecology Procedure, Num Vapocoolant Spray, Vapocoolant Spray, Vapocoolant

Brief summary

The purpose of this study is to assess if Num vapocoolant spray decreases pain associated with paracervical block in gynecology procedures.

Detailed description

After patients seen in our clinic have decided to proceed with a gynecology procedure that requires a paracervical block, the doctor will evaluate if the patient meets eligibility criteria for this study. If the patient does meet eligibility criteria, the doctor will inform the patient about the study and the potential risks. All patients will be given written informed consent. If the patient decides to participate in the study, they will be randomized (patient blinded) to receive either Num vapocoolant spray or placebo (normal saline spray), which the patient will receive during their gynecologic procedure just before the paracervical block. The purpose of this study is to see if the Num vapocoolant spray decreases patients pain with the paracervical block.

Interventions

This is the study arm. Partipants in this arm will receive Num vapocoolant spray during their gynecologic procedure. They will receive the spray on their cervix right before the paracervical block. Num Vapocoolant spray is currently FDA approved to be used on skin prior to injections. The investigators are using it in the same fashion but in the vagina on the cervix to help with the pain of the paracervical block injection.

OTHERPlacebo

This is the placebo. This group will receive Natures tear normal saline spray.

Sponsors

Lakshmi Devi and Devraj Sharma Endowment
CollaboratorUNKNOWN
Queen's Medical Center
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
SUPPORTIVE_CARE
Masking
SINGLE (Subject)

Masking description

Research coordinators who will be collecting pain scales from patients will be blinded to intervention assignment.

Eligibility

Sex/Gender
FEMALE
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Age 18 years of age or older Undergoing a procedure requiring paracervical block English-speaking Able and willing to sign the informed consent form and agree to terms of the study

Exclusion criteria

* Required or requested narcotics, anxiolytics, IV sedation, or general anesthesia for the procedure Declines or has a contraindication/allergy to ibuprofen Previously received vapocoolant spray in a medical setting Contraindications or allergies to lidocaine for paracervical block or vapocoolant spray components (1,1,3,3-pentafluoropropaine or 1,1,1,2-tetrafluroethane)

Design outcomes

Primary

MeasureTime frameDescription
Pain With Paracervical BlockImmediately after paracervical block (0 minutes after PCB completed)The investigators will ask patients to rate their pain with the paracervical block using a visual analog scale (VAS). The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as no pain, 100 is marked as worst pain.

Secondary

MeasureTime frameDescription
Patient Satisfaction With ProcedureImmediately after their gynecologic procedure (0 minutes after procedure completed)The investigators will also ask patients after their gynecologic procedure how satisfied they were with the procedure and the pain control during the procedure using a Visual Analog Scale (VAS). The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as not satisfied, 100 is marked as extremely satisfied.
Provider Ease of UseWithin 5 minutes after patient procedureImmediately after the patients gynecologic procedure, the research coordinators will ask the provider how easy it was to use the spray. The provider will use a visual analog scale. The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as not easy to use, 100 is marked as easy to use.
Other Pain Points During Gynecology ProcedureBaseline pain (immediately before procedure), after tenaculum (0 minutes after tenaculum placed), and 5 minutes after procedureThe investigators will also look at a patients reported pain using the Visual Analog Scale (VAS) during other times of the procedure. Specifically: Prior to the start of the procedure (baseline) After tenaculum placement, Five minutes post-procedure. The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as no pain, 100 is marked as worst pain.
Pre Procedure AnxietyImmediately after enrollment - before procedureThe investigators will also ask the patient how anxious they are before the procedure using the Visual Analog Scale (VAS). The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as no anxiety, 100 is marked as anxious.

Countries

United States

Participant flow

Participants by arm

ArmCount
Natures Tears
This is the placebo arm. Participants in this arm will receive Natures Tears spray during their gynecologic procedure. They will receive the spray on their cervix right before the paracervical block. Natures Tears is normal saline, which is sprayed from a canister similar to the Num vapocoolant. Placebo: This is the placebo. This group will receive Natures tear normal saline spray.
49
Num Vapocoolant Spray
This is the intervention arm. Num Vapocoolant Spray: This is the study arm. Partipants in this arm will receive Num vapocoolant spray during their gynecologic procedure. They will receive the spray on their cervix right before the paracervical block. Num Vapocoolant spray is currently FDA approved to be used on skin prior to injections. The investigators are using it in the same fashion but in the vagina on the cervix to help with the pain of the paracervical block injection.
49
Total98

Baseline characteristics

CharacteristicNatures TearsNum Vapocoolant SprayTotal
Age, Continuous28.9 Years
STANDARD_DEVIATION 6.7
29.7 Years
STANDARD_DEVIATION 6.1
29.3 Years
STANDARD_DEVIATION 6.4
Anxiety14 Participants18 Participants32 Participants
Depression9 Participants8 Participants17 Participants
Gestational age62.6 days
STANDARD_DEVIATION 18.8
60.2 days
STANDARD_DEVIATION 16.6
61.4 days
STANDARD_DEVIATION 17.3
History of cesarean section (1 or more)8 Participants10 Participants18 Participants
History of moderate or severe menstrual cramps15 Participants19 Participants34 Participants
History of vaginal deliveries (1 or more)27 Participants27 Participants54 Participants
Level of provider
attending
11 Participants4 Participants15 Participants
Level of provider
fellow
29 Participants30 Participants59 Participants
Level of provider
Intern
8 Participants10 Participants18 Participants
Level of provider
resident
1 Participants5 Participants6 Participants
Parity33 Participants31 Participants64 Participants
Prior gynecologic procedures20 Participants29 Participants49 Participants
Race and Ethnicity Not Collected0 Participants
Sex/Gender, Customized
Female
49 Participants49 Participants98 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 480 / 49
other
Total, other adverse events
0 / 482 / 49
serious
Total, serious adverse events
0 / 480 / 49

Outcome results

Primary

Pain With Paracervical Block

The investigators will ask patients to rate their pain with the paracervical block using a visual analog scale (VAS). The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as no pain, 100 is marked as worst pain.

Time frame: Immediately after paracervical block (0 minutes after PCB completed)

ArmMeasureValue (MEDIAN)
Natures TearsPain With Paracervical Block27 units on a scale
Num Vapocoolant SprayPain With Paracervical Block20 units on a scale
Secondary

Other Pain Points During Gynecology Procedure

The investigators will also look at a patients reported pain using the Visual Analog Scale (VAS) during other times of the procedure. Specifically: Prior to the start of the procedure (baseline) After tenaculum placement, Five minutes post-procedure. The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as no pain, 100 is marked as worst pain.

Time frame: Baseline pain (immediately before procedure), after tenaculum (0 minutes after tenaculum placed), and 5 minutes after procedure

ArmMeasureGroupValue (MEDIAN)
Natures TearsOther Pain Points During Gynecology ProcedureBaseline Pain1 units on a scale
Natures TearsOther Pain Points During Gynecology ProcedureTenaculum17 units on a scale
Natures TearsOther Pain Points During Gynecology ProcedurePain immediately after procedure53 units on a scale
Natures TearsOther Pain Points During Gynecology ProcedurePain 5 minutes post op23 units on a scale
Num Vapocoolant SprayOther Pain Points During Gynecology ProcedurePain 5 minutes post op23 units on a scale
Num Vapocoolant SprayOther Pain Points During Gynecology ProcedureBaseline Pain0 units on a scale
Num Vapocoolant SprayOther Pain Points During Gynecology ProcedurePain immediately after procedure56 units on a scale
Num Vapocoolant SprayOther Pain Points During Gynecology ProcedureTenaculum9 units on a scale
Secondary

Patient Satisfaction With Procedure

The investigators will also ask patients after their gynecologic procedure how satisfied they were with the procedure and the pain control during the procedure using a Visual Analog Scale (VAS). The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as not satisfied, 100 is marked as extremely satisfied.

Time frame: Immediately after their gynecologic procedure (0 minutes after procedure completed)

ArmMeasureGroupValue (MEDIAN)
Natures TearsPatient Satisfaction With ProcedureSatisfaction w procedure91.5 units on a scale
Natures TearsPatient Satisfaction With ProcedureSatisfaction with pain control during procedure82 units on a scale
Num Vapocoolant SprayPatient Satisfaction With ProcedureSatisfaction w procedure94 units on a scale
Num Vapocoolant SprayPatient Satisfaction With ProcedureSatisfaction with pain control during procedure75 units on a scale
Secondary

Pre Procedure Anxiety

The investigators will also ask the patient how anxious they are before the procedure using the Visual Analog Scale (VAS). The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as no anxiety, 100 is marked as anxious.

Time frame: Immediately after enrollment - before procedure

ArmMeasureValue (MEDIAN)
Natures TearsPre Procedure Anxiety59 units on a scale
Num Vapocoolant SprayPre Procedure Anxiety48 units on a scale
Secondary

Provider Ease of Use

Immediately after the patients gynecologic procedure, the research coordinators will ask the provider how easy it was to use the spray. The provider will use a visual analog scale. The visual analog scale is 100 mm line, with values 0 to 100. 0 is marked as not easy to use, 100 is marked as easy to use.

Time frame: Within 5 minutes after patient procedure

ArmMeasureValue (MEDIAN)
Natures TearsProvider Ease of Use0 units on a scale
Num Vapocoolant SprayProvider Ease of Use0 units on a scale

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026