Background and aim The curious phenomenon phantom limbs early became the object of research, and its underlying mechanisms have been discussed over the years. The complex nature of phantom phenomena makes interpretation of the results ambiguous, regarding both prevalence and the accompanying suffering. There is a lack of knowledge about how amputees experience the meaning and consequences of phantom phenomena. The present aim, therefore, was to investigate how individuals, in an interview situation, described the qualities of possible perceived phantom phenomena, and how their experience affected their lives one month after the amputation/mastectomy. Methods Twenty-eight women and men who had undergone a limb amputation or mastectomy were interviewed. The focused, narrative-oriented interviews were transcribed verbatim and the scripts were analysed with content analysis. Results One month after the amputation the informants described and related their phantom pain and phantom sensations in sensory-discriminative, motivational-affective and cognitive-evaluative dimensions. The phantom sensations were experienced mainly as more agonizing than the phantom pain. Despite both the high intensity of and the high annoyance at the phantom pain and phantom sensations, a majority felt that the phantom phenomena were not a hindrance in their attempts to recapture ordinary life. But when the hindrance was evaluated as high, the annoyance was evaluated as the highest possible for both phenomena or for the phantom sensations alone, never for phantom pain alone. The interviewees' reported attitudes of hindrance were also described and estimated in the light of their sociocultural circumstances. Thus, other preceding and/or co-existent pain conditions as well as factors such as pre-operative information, the respondents' views on pain treatment, and their knowledge and understanding of phantom phenomena were mentioned and related to the pain-producing situation. Two-thirds of the interviewees had received post-surgical information and for some, the phenomena were well-known from earlier experience. A majority applied some version of the medical explanation model, irrespective of age or level of education. However neither information nor medical explanation, or both, sufficed for them to understand their own phantom phenomena. Thus, differences between the concepts explanation and understanding seemed significant for the annoyance related to the phantom phenomena. Regarding background data (i) the majority of the interviewees had had pre-amputation pain problems; (ii) the breast-cancer phantoms differed in several ways; (iii) there were some age and gender differences in the descriptions of hindrance. Conclusions and implications These findings highlight the importance of observing the individual approach to the phenomena as a process of evaluation and selection. In addition, experience and understanding of the phantoms also have sociocultural aspects. There follows the need for individualized communication and information from the clinician, and for incorporating a socioscientific and meaning-centred approach in future studies. The present insights could also be of value in other iatrogenic pain conditions.
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http://dx.doi.org/10.1016/j.sjpain.2012.02.007 | DOI Listing |
Prosthet Orthot Int
October 2024
Aix Marseille Univ, CNRS, ISM, Marseille, France.
Background: Recent therapeutic and technological solutions aim to improve the daily living of people with limb amputation by considering various aspects of the phantom limb, in particular painless phantom sensations (PS) and voluntary phantom movements (VPM).
Objective: Although previous research has explored these phenomena mostly without considering the prosthesis, this study investigates the influence of prosthesis wearing on painless PS, painful PS, and VPM, in people with lower-limb amputation.
Study Design: Cross-sectional study based on semi-directed interviews.
PLoS One
December 2024
Bio-Inspired Technology Group, Faculty of Mechanical Engineering, Department of BioMechanical Engineering, Delft University of Technology, Delft, The Netherlands.
Pedicle screws have long been established as the gold standard for spinal bone fixation. However, their fixation strength can be compromised in cases of low bone density, particularly in osteoporotic bone, due to the reliance on a micro-shape lock between the screw thread and the surrounding bone. To address this challenge, we propose augmenting conventional pedicles screws with a curved compliant anchor.
View Article and Find Full Text PDFTher Adv Ophthalmol
December 2024
Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK.
Charles Bonnet syndrome (CBS) is a condition characterised by visual hallucinations of varying complexity on a background of vision loss. CBS research has gained popularity only in recent decades, despite evidence dating back to 1760. Knowledge of CBS among both the patient and professional populations unfortunately remains poor, and little is known of its underlying pathophysiology.
View Article and Find Full Text PDFInt J Med Robot
December 2024
Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, Hawaii, USA.
Background: In-bore MRI prostate biopsy offers improved visualisation and detection of significant prostate cancer; however, it is not widely practiced in cancer diagnosis due to its associated costs.
Methods: This work introduces the first prototype towards a 7-degrees-of-freedom (DOF) MRI-conditional piezoelectrically actuated robotic system for transperineal prostate biopsy. The robot enables needle insertions in the desired trajectories.
J R Soc Interface
December 2024
Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA.
Soft tissue at the human-exoskeleton interface can deform under load to absorb, return and dissipate the mechanical energy generated by the exoskeleton. These soft tissue effects are often not accounted for and may mislead researchers on the actual joint assistance an exoskeleton provides. We assessed the effects of soft tissue by quantifying the performance and energy distribution of a knee exoskeleton under different assistance strategies using a synthetic lower limb phantom.
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