| 1. | Description      of Services:  Management      of the design, development and testing of Scivanta’s two-balloon      esophageal catheter system currently know as the Hickey Cardiac Monitoring      System by Dennis Hepp. |
|----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 2. | Acceptance      Criteria:  The Services shall not be considered complete      until accepted by Scivanta in accordance with established specifications,      government regulations, and accepted industry development      practices. |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 3. | Expected      Duration of Services:  Rivertek will continue to provide      services on an as-requested      basis until otherwise notifed by Scivanta in accordance with      Section 7.01.  Rivertek will be notified of Scivanta’s need for      services, and the expected duration of those services when the work is      available. |
|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4. | Schedule      of Charges:  This is a time and materials      contract.  Charges for personnel will be billed at a rate equal      75% of Rivertek’s standard rates.  It is expected that Dennis      Hepp will be the sole provider of Rivertek’s services to      Scivanta.  Mr. Hepp’s current standard rate is $120/hour and his      discounted rate, which will be the Scivanta’s billing rate, will be      $90/hour. |
|----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 5. | Issuance      of Warrant:  Scivanta will issue Rivertek a warrant to      purchase 125,000 shares of Scivanta common stock at an exercise price      equal to Scivanta’s closing price on the date that this Amendment Number 1      to the Service Agreement is executed.  The warrant will vest      pro-rata on a monthly basis over the subsequent 12 month      period.  The warrant will contain standard anti-dilution clauses      and will have a 5 year term. |
|----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| Rivertek Medical Systems, Inc.    |
|-----------------------------------|
|                              |   |
| By:                               | /s/      Dennis G. Hepp |
|                              |  Dennis      G. Hepp |
|                              |  Managing      Director |
|                              |   |
| Date:      April 28, 2008         |
|                              |   |
| Scivanta      Medical Corporation |
|                              |   |
| By:                               | /s/      Thomas S. Gifford |
|                              |  Thomas      S. Gifford |
|                              |  Executive      Vice President and CFO |
|                              |   |
| Date:      April 28,2008          |

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