Coupling an ultrasound probe to the skin

1. A system comprising an ultrasound probe and a tape for securing the ultrasound probe to the skin, wherein the ultrasound probe has a probe surface for transmission of ultrasound pulses from an ultrasound transducer, and wherein the tape is fixed to the probe surface and is arranged to adhere the probe surface to the skin, the tape comprising:

a sonolucent adhesive silicone gel for transmitting ultrasound from the ultrasound transducer to the body;

a first adhesive surface for adhesion of the silicone gel to the skin; and

a second adhesive surface adhering the silicone gel to the probe surface of the ultrasound probe.

2. A system as claimed in claim 1 , wherein the tape comprises a structural layer for supporting the gel layer(s).

3. A system as claimed in claim 2 , wherein the structural layer is a non-woven material and there is a layer of silicone gel on either side of the non-woven material.

4. A system as claimed in claim 1 , wherein the sonolucent silicone gel comprises silicone gel treated by vacuum degassing or other air bubble reduction treatment.

5. A method comprising:

treating a silicone adhesive composition or components of the composition to remove air or prevent the formation of air bubbles, in order to provide a sonolucent adhesive product;

transferring the treated adhesive composition onto a structural layer and/or a mould;

curing the silicone to form a sonolucent silicone gel tape product; and

fixing the sonolucent silicone gel tape product to an ultrasound probe, wherein the ultrasound probe has a probe surface for transmission of ultrasound pulses from an ultrasound transducer, and wherein the sonolucent silicone gel tape product is fixed to the probe surface and is arranged to adhere the probe surface to the skin.

6. A method as claimed in claim 5 , wherein the treatment process comprises degassing the adhesive composition or components of the composition under vacuum.

7. A method as claimed in claim 5 , wherein the silicone adhesive gel is a mixture of two or more components, and a degassing or air bubble prevention treatment is applied to each component before mixing.

8. A method as claimed in claim 7 , comprising mixing the two components under vacuum and/or using a specialised mixing device to reduce air entrapment.

9. A system as claimed in claim 1 , wherein the first adhesive surface and/or the second adhesive surface comprise a tack value of 3 to 8 mJ/cm 2 .

10. A method as claimed in claim 5 , wherein the cured silicone comprises a tack value of 3 to 8 mJ/cm 2 .