Focused Ultrasound Therapy
Focused ultrasound is an early-stage, noninvasive, therapeutic technology with the potential to improve the quality of life and decrease the cost of care for patients with extravascular hematomas. This novel technology focuses beams of ultrasound energy precisely and accurately on targets deep in the brain without damaging surrounding normal tissue.
How it Works
Where the beams converge, the focused ultrasound produces histotripsy (mechanical destruction) of the fibers within the hematoma. This enables the hematoma to be aspirated with fine needle instead of requiring a surgical removal. While early results are promising, there is still much to be done before this technology will be widely available.
The primary options for treatment of hematomas include medication and invasive surgery.
For certain patients, focused ultrasound could provide a noninvasive alternative to surgery with less risk of complications – such as surgical wound healing or infection – at a lower cost. Focused ultrasound can also reach the desired target without damaging surrounding tissue, and it can be repeated, if necessary.
At the present time, there are no clinical trials recruiting patients for focused ultrasound treatment of extravascular hematomas.
Regulatory Approval and Reimbursement
Focused ultrasound treatment for extravascular hematomas is not yet approved by regulatory bodies or covered by medical insurance companies.
Hendley S, Bollen V, Anthony GJ, Paul JD, Bader KB. In vitro assessment of stiffness-dependent histotripsy bubble cloud activity in gel phantoms and blood clots. Phys Med Biol. 2019 May 30. doi: 10.1088/1361-6560/ab25a6.
Gerhardson T, Sukovich JR, Chaudhary N, Chenevert TL, Ives K, Hall TL, Camelo-Piragua S, Xu Z, Pandey AS. Histotripsy Clot Liquefaction in a Porcine Intracerebral Hemorrhage Model. Neurosurgery. 2019 Mar 29. pii: nyz089. doi: 10.1093/neuros/nyz089.
Boiling histotripsy liquefaction of large extravascular hematomas: in vitro optimization and device design considerations. Presentation by Tanya Khokhlova. 2018
Gerhardson T, Sukovich JR, Pandey AS, Hall TL, Cain CA, Xu Z. Effect of Frequency and Focal Spacing on Transcranial Histotripsy Clot Liquefaction, Using Electronic Focal Steering. Ultrasound Med Biol. 2017 Oct;43(10):2302-2317. doi: 10.1016/j.ultrasmedbio.2017.06.010. Epub 2017 Jul 14.
Khokhlova TD, Monsky WL, Haider YA, Maxwell AD, Wang YN, Matula TJ. Histotripsy Liquefaction of Large Hematomas. Ultrasound Med Biol. 2016 Jul;42(7):1491-8. doi: 10.1016/j.ultrasmedbio.2016.01.020. Epub 2016 Apr 25.
Maxwell AD, Cain CA, Duryea AP, Yuan L, Gurm HS, Xu Z. Noninvasive thrombolysis using pulsed ultrasound cavitation therapy - histotripsy. Ultrasound Med Biol. 2009 Dec;35(12):1982-94. doi: 10.1016/j.ultrasmedbio.2009.07.001. Epub 2009 Oct 24.
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