LIMITED POWER OF ATTORNEY - SECURITIES LAW COMPLIANCE

      The undersigned, as a Section 16 reporting person of Invuity, Inc. (the
"Company"), hereby constitutes and appoints each of (i) the Company's General
Counsel, who is currently Brett Robertson, (ii) the Company's Chief Financial
Officer, who is currently James Mackaness, (iii) the Company's Counsel, who is
currently Dan Caul, and (iv) the Company's Sr. Director of Finance, who is
currently Nancy Hargreaves, and their respective successors, signing singly, the
undersigned's true and lawful attorney-in-fact, to:

      1.     Complete and execute Forms 3, 4 and 5 and other forms and all
amendments thereto as such attorneys-in-fact shall in their discretion determine
to be required or advisable pursuant to Section 16 of the Securities Exchange
Act of 1934, as amended, and the rules and regulations promulgated thereunder,
or any successor laws and regulations, as a consequence of the undersigned's
ownership, acquisition or disposition of securities of the Company; and

      2.     Do all acts necessary in order to file such forms with the
Securities and Exchange Commission, any securities exchange or national
association, the Company and such other person or agency as the attorneys-in-
fact shall deem appropriate.

      The undersigned hereby ratifies and confirms all that said attorneys-in-
fact and agent shall do or cause to be done by virtue hereof.  The undersigned
acknowledges that the foregoing attorneys-in-fact, in serving in such capacity
at the request of the undersigned, is not assuming, nor is the Company assuming,
any of the undersigned's responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934, as amended.

      This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
Company and the foregoing attorneys-in-fact.

      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 24 day of August, 2015.


                                       Signature:    /s/ Reza Zadno
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                                       Print Name:   Reza Zadno
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