CClinicalTrials.gg
Active, not recruitingNCT04598035ESCAPEUpdated Aug 7, 2025

Epidural Spinal Cord Stimulation for Hypertension in Patients With Neuropathic Pain

An observational study in Chronic Pain, Hypertension and Implanted Stimulation Electrodes, sponsored by University of Kansas Medical Center. Active, not recruiting at 2 sites in United States. Open to participants aged 30 Years to 89 Years. Per ClinicalTrials.gov, last updated 2025-08-07.

Sponsored by University of Kansas Medical Center · Observational

From the registry’s dates

  • Primary completion was expected by Nov 2025, 11 months ago, but the record still lists the study as active, not recruiting.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
72
Ages
30 Years to 89 Years
Sex
All
01

Study summary

The purpose of the ESCAPE Study is to determine the extent to which epidural spinal cord stimulation (SCS) reduces arterial blood pressure (BP) in patients which chronic low back pain and hypertension. We also aim to determine the extent to which higher baseline BP (i.e., hypertension) predicts reductions in pain following SCS implant. This is an observational study of patients undergoing an implantation of a SCS device.

Read the detailed description

The broad research goal of this study is to examine the extent to which arterial blood pressure (BP) and blood markers related to hypertension and kidney function are reduced in a prospective cohort of patients undergoing implantation of an epidural spinal cord stimulator (SCS) for the purpose of managing chronic pain in the lower back and/or limbs.

Specific aims:

  1. Examine the extent to which BP (primary variable), norepinephrine (marker of sympathetic nerve activity in the blood), and a vascular ultrasound scan are improved following the implant of a SCS device among patients with chronic pain and hypertension.
  2. Examine the extent to which markers of kidney function in the blood [serum creatinine, glomerular filtration rate (GFR), and blood urea nitrogen (BUN)] are reduced following the implant of a SCS device among patients with chronic pain and hypertension.
  3. Determine the extent to which BP predicts reductions in pain following the implant of a SCS device.
02

Conditions studied

  • Chronic Pain
  • Hypertension
  • Implanted Stimulation Electrodes
03

In context

Chronic Pain

2,930 studies on the registry are indexed under Chronic Pain; 701 are open to participants now.

This study's planned enrollment of 72 is below the median of 126 across 688 observational studies indexed under Chronic Pain.

Browse Chronic Pain studies →

Lead sponsor

University of Kansas Medical Center is the lead sponsor of 483 studies on the registry; 113 are open to participants now.

Of its 38 completed or terminated interventional studies of FDA-regulated products, 24 (63%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
30 Years to 89 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Chronic low back pain (complex regional pain syndrome, failed back surgery syndrome)

Eligibility criteria

  • Planning to have an epidural spinal cord stimulation device implanted at KUMC
  • Male or Female, age 30-89
  • Low back pain for more than 3 months
  • Willing to visit research lab
  • Willing to undergo a blood draw and blood pressure measures
  • Able to provide written informed consent
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
72 participants (estimated)
Target follow-up
2 Months
Patient registry
Yes
Biospecimen retention
Samples with dna

Groups and cohorts

  • Primary Group

    Patients with chronic low back pain that candidates them for surgical implant of a SCS device, and received a permanent SCS device.

    Diagnostic Test: Diagnostic Tests

  • Control Group

    Patients with chronic low back pain that are candidates for a surgical implant of a SCS device and do not receive a permanent SCS device after trial leads are placed.

    Diagnostic Test: Diagnostic Tests

Interventions

  • Diagnostic testDiagnostic Tests

    1. Blood and Urine laboratory tests 2. ECG and blood pressure for cardiovascular measurements 3. Self-report questionnaires about pain

06

What researchers measure

Primary outcomes

  1. Change from Baseline Blood Pressure Measurement to 1 week post-op

    Measurements of blood pressure via arm cuff and finger cuff

    Time frame: Baseline and 1 week post-op

  2. Change from Baseline Blood Pressure Measurement to 4 week post-op

    Measurements of blood pressure via arm cuff and finger cuff

    Time frame: Baseline and 4 week post-op

  3. Change from Baseline Blood Pressure Measurement to 8 week post-op

    Measurements of blood pressure via arm cuff and finger cuff

    Time frame: Baseline and 8 week post-op

  4. Change from Baseline PainDETECT Questionnaire to 1 week post-op

    A battery of questionnaires is intended to understand key aspects of pain, mood, and function as quickly and efficiently as possible. The focus of these measures is on obtaining an accurate assessment of pain, while also asking about physical function, anxiety, and other associated somatic disturbances. These questionnaires will be taken prior to SCS implant (Baseline) and after SCS implant (1 week post-op, 4 weeks post-op, and 8 weeks post-op ) to assess and compare. Neuropathic Pain Descriptors: The Pain DETECT is a 9-item measure of sensory descriptors and spatial and temporal characteristics that has demonstrated utility in identifying central neuropathic pain.

    Time frame: Baseline and 1 week post-op.

  5. Change from Baseline PainDETECT Questionnaire to 4 week post-op

    A battery of questionnaires is intended to understand key aspects of pain, mood, and function as quickly and efficiently as possible. The focus of these measures is on obtaining an accurate assessment of pain, while also asking about physical function, anxiety, and other associated somatic disturbances. These questionnaires will be taken prior to SCS implant (Baseline) and after SCS implant (1 week post-op, 4 weeks post-op, and 8 weeks post-op ) to assess and compare. Neuropathic Pain Descriptors: The Pain DETECT is a 9-item measure of sensory descriptors and spatial and temporal characteristics that has demonstrated utility in identifying central neuropathic pain.

    Time frame: Baseline and 4 week post-op.

  6. Change from Baseline PainDETECT Questionnaire to 8 week post-op

    A battery of questionnaires is intended to understand key aspects of pain, mood, and function as quickly and efficiently as possible. The focus of these measures is on obtaining an accurate assessment of pain, while also asking about physical function, anxiety, and other associated somatic disturbances. These questionnaires will be taken prior to SCS implant (Baseline) and after SCS implant (1 week post-op, 4 weeks post-op, and 8 weeks post-op ) to assess and compare. Neuropathic Pain Descriptors: The Pain DETECT is a 9-item measure of sensory descriptors and spatial and temporal characteristics that has demonstrated utility in identifying central neuropathic pain.

    Time frame: Baseline and 8 week post-op.

  7. Baseline Laboratory Tests

    Serum creatinine, estimated glomerular filtration rate (eGFR), blood urea nitrogen (BUN), TNF-alpha, 8-Isoprostane

    Time frame: Baseline

  8. 1 week post-op Laboratory Tests

    Serum creatinine, estimated glomerular filtration rate (eGFR), blood urea nitrogen (BUN), TNF-alpha, 8-Isoprostane

    Time frame: 1 week post-op

  9. 4 week post-op Laboratory Tests

    Serum creatinine, estimated glomerular filtration rate (eGFR), blood urea nitrogen (BUN), TNF-alpha, 8-Isoprostane

    Time frame: 4 week post-op

  10. 8 week post-op Laboratory Tests

    Serum creatinine, estimated glomerular filtration rate (eGFR), blood urea nitrogen (BUN), TNF-alpha, 8-Isoprostane

    Time frame: 8 week post-op

07

Study locations

2 sites
  • University of Kansas Clinical and Translational Science Unit (CTSU)
    Fairway, Kansas 66205, United States
  • The Marc A. Asher Comprehensive Spine Center at the Kansas University Medical Center
    Kansas City, Kansas 66160, United States
08

References and documents

Individual participant data

Plan to share: Undecided — IPD may be available upon reasonable request

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 7, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04598035
Lead sponsor
University of Kansas Medical Center
Responsible party
Seth Holwerda PhD (Principal Investigator, University of Kansas Medical Center) — Principal investigator
First posted
Oct 22, 2020
Start date
Nov 1, 2020
Primary completion
Nov 1, 2025 (estimated)
Completion
Nov 1, 2025 (estimated)
Last update
Aug 7, 2025

Study contacts

Seth W Holwerda, PhD
principal investigator · University of Kansas Medical Center

Oversight

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

Not currently enrolling

This study is active, not recruiting, as verified in Aug 2025. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion