Exhibit 1

JOINT FILING AGREEMENT

Each of the undersigned agrees that (i) the statement on Schedule 13G relating to the Common Stock of Entellus Medical, Inc., has been adopted and filed on behalf of each of them, (ii) all future amendments to such statement on Schedule 13G/A will, unless written notice to the contrary is delivered as described below, be jointly filed on behalf of each of them, and (iii) the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934 apply to each of them. This agreement may be terminated with respect to the obligations to jointly file future amendments to such statement on Schedule 13G/A as to any of the undersigned upon such person giving written notice thereof to each of the other persons signature hereto, at the principal office thereof.

This Agreement may be executed in any number of counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Date: February 15, 2018.


ESSEX WOODLANDS HEALTH VENTURES VIII, LLC		INDIVIDUALS:

By:	/s/ Martin P. Sutter	/s/ Martin P. Sutter
	Name: Martin P. Sutter	Name: Martin P. Sutter
	Title: Managing Director

ESSEX WOODLANDS HEALTH VENTURES VIII, L.P.		/s/ Jeff Himawan
		Name: Jeff Himawan
By:	Essex Woodlands Health Ventures VIII, LLC, Its General Partner


By:	/s/ Martin P. Sutter	/s/ Ronald W. Eastman
	Name: Martin P. Sutter	Name: Ronald W. Eastman
	Title: Managing Director

ESSEX WOODLANDS HEALTH VENTURES FUND VIII, L.P.		/s/ Guido J. Neels
		Name: Guido Neels

By:	Essex Woodlands Health Ventures VIII, L.P.,
	Its General Partner

By:	Essex Woodlands Health Ventures VIII, LLC,
	Its General Partner	/s/ Petri Vainio
By:	/s/ Martin P. Sutter	Name: Petri Vainio
	Name: Martin P. Sutter	/s/ Steve Wiggins
	Title: Managing Director	Name: Steve Wiggins


ESSEX WOODLANDS HEALTH VENTURES FUND VIII-A, L.P.

By:	Essex Woodlands Health Ventures VIII, L.P., Its General Partner	/s/ Immanuel Thangaraj Name: Immanuel Thangaraj

By:	Essex Woodlands Health Ventures VIII, LLC, Its General Partner

By:	/s/ Martin P. Sutter
	Name: Martin P. Sutter
	Title: Managing Director

ESSEX WOODLANDS HEALTH VENTURES FUND VIII-B, L.P.

By:	Essex Woodlands Health Ventures VIII, L.P., Its General Partner

By:	Essex Woodlands Health Ventures VIII, LLC, Its General Partner

By:	/s/ Martin P. Sutter
	Name: Martin P. Sutter
	Title: Managing Director

ENTELLUS MEDICAL INC SC 13G/A