Biomedical adhesive electrode and method of use
A biomedical, conductive adhesive technology, used in electrodes, medical science, microwave therapy, etc.
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[0034] FIG. 1 shows a bottom perspective view of a dispersive electrode 10 . In this bottom perspective view, the upper surface of the distally located electrode 10 may be a soft, comfortable, non-conductive backing 12 . To make electrical contact with the patient's body, at least one conductor plate is required. In this example, along the longitudinal axis Y-Y corresponding to section line 2-2, there are two adjacent conductor plates 14 and 16, which may be bonded to the non-conductive backing 12. Since two separate conductor plates can be used for a contact quality monitoring ("CQM") circuit, having two conductor plates is preferred since the impedance between conductor plates 14 and 16 can be determined by the CQM circuit as described above.
[0035] The two conductor plates 14 and 16 each have an extension tab 18 and 20 which respectively extend outwardly from the body contacting portion 22 of the electrode 10 for contacting the electrode 10 to an electrosurgical signal g...
example 1
[0072] Two electrodes were constructed according to the following steps. One electrode consists of a 129cm corner radius of 2.54cm 2 (20 square inches) of aluminum foil. A conductive adhesive layer was prepared according to the following procedure. Into a 300 gallon jug equipped with an overhead mixer and cooling jacket were added 562.8 lbs (255.5 kg) of acrylic acid, 1.4 lbs (636 g) of 2,2-dimethoxy-2-phenylacetophenone, 2.8 lbs ( 1273 grams) 4-(2-hydroxyethoxy) phenyl-(2-hydroxy-2-methylpropyl) ketone, 1.12 pounds (508 grams) methylenebis(acrylamide), 1251.6 pounds (568.2 kilograms ) glycerin, 2.8 lbs (1273 grams) claw ear gum, and 459.6 lbs (208.7 kg) deionized water. 499.8 lbs (226.9 kg) of 50% aqueous NaOH were added in portions to the well stirred solution, maintaining the batch temperature below 38°C. An additional 18 lbs (8.2 kg) of deionized water was used to rinse the hydroxide into the jug and agitate for 30 minutes to obtain the coater precursor. The precursor...
Embodiment 5
[0082] 3M brand Electrosurgical Patient Plate Catalog #7146 (64.5 cm surface area) available from 3M Company of Paul, MN 2 ) biomedical dispersive electrodes were placed on the front of the patient's left leg. 3M brand Electrosurgical Patient Plate Catalog #7149 (129 cm surface area) available from 3M Company of Paul, MN 2 ) biomedical dispersive electrodes were placed on the front of the patient's right leg. After 30 minutes, peel half of the right leg electrode back to make a surface area of 64.5 cm 2 , and has two sharp corners (not rounded), Figure 7 The results of this comparative example show that the electrode on the anterior side of the stripped right leg (electrode on the left in the thermal image) after substantially equilibrating, had less temperature rise than the electrode on the left leg that had not been altered. This Comparative Example 5 demonstrates that the unexpected effect of reducing edge effects found in Example 1 can be reproduced in commercially ...
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