Please select the eligibility criteria that correspond to the clinical trial below.
Title: The Efficacy of Spinal Cord Stimulation in Patients With a Failed Back Surgery Syndrome.
Brief Summary: When patients suffer from chronic pain after multiple back surgeries, this is denominated as the 'failed back surgery syndrome'. A possible treatment for these patients is spinal cord stimulation. This is an invasive treatment where no other treatment options (medication, minimal invasive treaments) can offer progress to the patients' health status. In spinal cord stimulation, an electrode will be placed at the spinal cord under local anaesthesia whereas via a battery a painless electrical stimulation will arise. Clinical research have demonstrated that a new way of spinal cord stimulation can improve back and leg pain significantly. This will lead to a better quality of life for the patients and a decreased use of medications. In Ziekenhuis Oost-Limburg, different manners of spinal cord stimulation will be compared to each other.


Options:
A: Inclusion Criteria:

1. A diagnosis of primary or idiopathic erythromelalgia
2. Patients ≥18 years who have developed chronic pain that has remained refractory to medical treatment for ≥6 months.
3. Minimum pain intensity of 5/10 on a numeric rating scale NRS at baseline.
4. Successful two-week SCS testing period with tonic stimulation (≥2 points reduction in pain NRS from baseline). This means patients will experience paresthesia during the trial period of spinal cord stimulation.

Exclusion Criteria:

1. Coexisting conditions that would increase procedural risk (e.g., sepsis, coagulopathy).
2. History of laminectomy or posterior fusion at the thoracolumbar junction, where percutaneous electrode end tips are routinely placed.
3. Abnormal pain behavior and/or unresolved psychiatric illness.
4. Unresolved issues of secondary gain or inappropriate medication use.
5. Unfit for participation for any other reason as judged by the study physician.
B: Inclusion Criteria:

* Patients with an implanted neurostimulation system met een FBSS met geïmplanteerd

Exclusion Criteria:

* no knowledge of the Dutch language
* Addicted to drugs
C: Inclusion Criteria:

* Sub-acromial pain of at least 3 month (tendinopathy and partial tear only).
* Diagnosed by a Consultant of tendinopathic pain or partial thickness rotator cuff tear
* Has had an MRI or Ultrasound Scan to rule out alternative pathology
* Eligible for surgery.
* Completed a conservative management programme previously including:

  * physiotherapy that includes a remedial exercise regimen and
  * at least x1 cortisone injection but not more than 3 injections.

Exclusion Criteria:

* Full thickness tear of the rotator cuff tendons evident on MRI or Ultrasound imaging
* Undergone previous surgery on affected shoulder
* Have RA or other inflammatory disorder
* Symptomatic cervical spine pathology
* Previous septic arthritis
* History of radiotherapy on same side as affected shoulder
* Patients who have a strong preference for one treatment over another to an extent that they would not participate if allocated to their non- preferred group.
D: Inclusion Criteria:

* The patient must have SCS implanted for at least 2 months before study start date
* The patient must be at least 18 years old
* The patient must currently be receiving pain relief from SCS usage
* The patient must be willing to participate in a 9-week study
* The patient must have at least 20% of battery life remaining in his/her spinal cord stimulator
* The patient must be able to tolerate Vicodin-Extra Strength as well as Tylenol, but can also take their own pain medication if it is not one of the two mentioned

Exclusion Criteria:

* The patient is pregnant or intends to become pregnant during the course of the study.
* The patient by report, and/or by physician assessment, exhibits any or all of the following, which might bias reporting of treatment outcome:

A strong untreated dependency on prescription medication such as benzodiazepines and narcotic analgesics.

A strong potential for secondary gain issues.

A significant, untreated psychiatric comorbidity.

* The patient possesses a coexisting clinically relevant or disabling chronic pain problem not treated by SCS
* The patient has been diagnosed with unstable angina
* The patient receives a Karnofsky's performance score of \<60

Answer: B