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Exhibit 31 CERTIFICATION
Pursuant to Exchange Rule 13a-14(a),
As adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 I, Arch B. Gilbert, certify that:  1.
    
    I have reviewed this annual report on Form 10-K of InterWest Medical Corporation;2.
    
    Based on my knowledge, this annual report does not contain any untrue statement of
a material fact or omit to state a material fact necessary to make the statements made,
in light of the circumstances under which such statements were made, not misleading with
respect to the period covered by the annual report;3.
    
    Based on my knowledge, the financial statements and other financial information
included in this annual report, fairly present in all material respects the financial
condition, results of operations and cash flows of the registrant as of, and for, the
periods presented in this annual report;4.
    
    I am responsible for establishing and maintaining disclosure controls and
procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and
15d-15(f)) for the registrant and have:  a.
    
    designed such disclosure controls and procedures, or caused such
disclosure controls and procedures to be designed under our supervision, to
ensure that material information relating to the registrant, including its
consolidated subsidiaries, is made known to me by others within those
entities, particularly during the period in which this annual report is being
prepared;b.
    
    Designed such internal control over financial reporting, or
caused such internal control over financial reporting to be designed under
our supervision, to provide reasonable assurance regarding the reliability of
financial reporting and the preparation of financial statements for the
external purposes in accordance with generally accepted accounting
principles;c.
    
    evaluated the effectiveness of the registrants disclosure
controls and procedures and presented in this report our conclusions about
the effectiveness of the disclosure controls and procedures, as of the period
covered by this report based on such evaluation; andd.
    
    disclosed in this report any change in the registrants internal
control over financial reporting that occurred during the registrants most
recent fiscal quarter (the registrants fourth fiscal quarter in the case of
an annual report) that has materially affected, or is reasonably likely to
materially affect, the registrants internal control over financial
reporting;  5.
    
    I have disclosed, based on my most recent evaluation of internal control over
financial reporting, to the registrants auditors and the Audit Committee of the
Companys Board of Directors (or persons performing the equivalent function):  a.
    
    all significant deficiencies and material weaknesses in the
design or operation of internal control over financial reporting which are
reasonably
likely to adversely affect the registrants ability to record, process,
summarize and report financial information; and




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b.
    
    any fraud, whether or not material, that involves management or
other employees who have a significant role in the registrants internal
control over financial reporting.  6.
    
    I have indicated in this annual report whether or not there were significant
changes in internal controls or in other factors that could significantly affect internal
controls subsequent to the date of my most recent evaluation, including any corrective
actions with regard to significant deficiencies and material weaknesses. /s/ Arch B. Gilbert
    
    December 23, 2004Arch B. Gilbert
President, Chief Executive Officer and Chief Financial Officer