Other therapeutic interventions

Author(s):  
Andrew Davies

Breakthrough pain is a heterogeneous condition. Non-pharmacological interventions include: rubbing/massage, application of heat, application of cold, distraction techniques, relaxation techniques, hypnotherapy/hypnosis, transcutaneous electrical nerve stimulation (TENS), and acupuncture. But most of these have not been subject to rigorous study. Anaesthetic interventions are usually utilized in patients with uncontrolled background pain, but they are sometimes used in patients with uncontrolled breakthrough pain. A variety of different techniques are available. Peripheral (local anaesthetic) nerve blockade and neuraxial analgesia delivery may be used. Non-surgical stabilization, surgical stabilization, corticosteroid instillation, alcohol instillation, phenol instillation, cryoablation, radiofrequency ablation, laser ablation, cementoplasty/vertebroplasty, balloon kyphoplasty, and MR-guided focused ultrasound surgery are other strategies, most of which have not been subject to rigorous scientific investigation. Non-opioid analgesics are a diverse group of drugs. Non-opioid analgesics may have a role in the management of breakthrough pain. Data on the use of most non-opioid analgesics is limited.

2021 ◽  
Author(s):  
Felix Wong ◽  
Lian Zhang ◽  
Zhibiao Wang

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ali Abdolali ◽  
Hooman Barati Sedeh ◽  
Mohammad Hosein Fakheri ◽  
Chen Shen ◽  
Fei Sun

AbstractBased on the transformation acoustics methodology, the design principle for achieving an arbitrary shape magnifying lens (ASML) is proposed. Contrary to the previous works, the presented ASML is competent of realizing far-field high resolution images and breaking the diffraction limit, regardless of the position of the utilized sources. Therefore, objects locating within the designed ASML can be properly resolved in the far-field region. It is shown that the obtained material through the theoretical investigations becomes an acoustic null medium (ANM), which has recently gained a significant attention. Besides the homogeneity of ANM, which makes it an implementable material, it is also independent of the perturbation in the geometry of the lens, in such a way that the same ANM can be used for different structural topologies. The obtained ANM has been implemented via acoustics unit cells formed by membranes and side branches with open ends and then was utilized to realize an ASML with the aid of effective medium theory. It is shown that the far-field results of an ideal ASML abide well with the results of the implemented sample, validating the proposed design principle. The presented acoustic magnifying lens has a wide spectrum of possible applications ranging from medical imaging, and biomedical sensors to focused ultrasound surgery.


Radiology ◽  
2001 ◽  
Vol 219 (1) ◽  
pp. 176-185 ◽  
Author(s):  
Kullervo Hynynen ◽  
Oliver Pomeroy ◽  
Darrell N. Smith ◽  
Peter E. Huber ◽  
Nathan J. McDannold ◽  
...  

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