An interventional study of Non-invasive sensory feedback in Phantom Limb Pain, sponsored by Lund University Hospital. Completed at 1 site in Sweden. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2018-08-17.
Sponsored by Lund University Hospital · Not applicable, Interventional, and Treatment
Amputation of a limb may result from trauma or surgical intervention. The amputation traumatically alters the body image, but often leaves sensations that refer to the missing body part. In 50-80% amputees, neuropathic pain develops, also called phantom limb pain (PLP). Both peripheral and central nervous system factors have been implicated as determinants of PLP. Also, PLP may be triggered by physical (changes in the weather) and psychological factors (emotional stress). Recent evidence suggests that PLP may be intricately related to neuroplastic changes in the cortex, and that these changes may modulated by providing sensory input to the stump or amputation zone.
A non-invasive clinical trial will test the effectiveness of non-invasive pressure sensory feedback build into a hand prosthesis to alleviate phantom limb pain.
During the pre-screen phase the investigators will assess whether the patient experiences referred phantom limb sensations or pain. In the case that the patient does experience referred sensations on the stump the investigators will map the areas where the sensation occurs on the stump and utilize this for placement of the surface actuators. In the opposite case, actuators will instead be placed in a matrix structure at the residual limb.
As a first step towards applying mechanical stimulation, the sensation thresholds (the level of stimulation where the subject first reports a sensation) have to be determined. The outcome of this procedure is a minimum of stimulation amplitude that can be applied for each stimulation site.
A first choice would be to use the referred map to place actuators. However, amputees have different phantom maps and also the number of areas varies.
A therapy will be defined based on the use of sensory feedback system integrated with the amputees hand prosthesis. The subject should use the hand prosthesis, with sensory feedback, for a duration of minimum 2 h per day during a 4 week period.
Preferably, the system should be used actively in normal daily activities.
150 studies on the registry are indexed under Phantom Limb; 40 are open to participants now.
This study's enrollment of 6 is below the median of 28 across 115 interventional studies indexed under Phantom Limb.
Browse Phantom Limb studies →Lund University Hospital is the lead sponsor of 64 studies on the registry; 15 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Behavioral: Non-invasive sensory feedback
A non-invasive simple sensory feedback system, which provides the user of a prosthetic hand with sensory feedback on the arm stump. It is mediated by air in a closed loop system connecting silicone pads on the prosthetic hand with pads on the amputation stump. The silicone pads in a "tactile display" on the amputation stump expand when their corresponding sensor-bulb in the prosthesis is touched, evoking an experience of "real touch". Most amputees experience phantom limb sensations and/or phantom limb pain, as well as residual limb stump pain. There is often a "map" of the phantom hand on the amputation stump, where pressure on specific skin areas result in evoked sensation from specific fingers in the amputated phantom hand. This map is the target for the sensory feedback.
Change in phantom Limb pain
Baseline status includes: phantom limb pain assessed using visual analogue scale.
Time frame: Baseline and after 4 week treatment
Cortical reorganization
MRI: Change in cortical response during sensory stimulation is examined
Time frame: Baseline and after 4 week treatment (2 hours/day)
This study is completed, as verified in Aug 2018. You cannot join it, but the record below documents what was studied.
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Lund University Hospital