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Device Description
Adherus AutoSpray Extended Tip (ET) Dural Sealant is a sterile, single-use, electromechanical, battery operated
device with internal system components that provide air flow to aid in the delivery of a synthetic, absorbable, two-
component hydrogel sealant system and allow delivery to be interrupted without clogging.
The device is supplied as a pre-assembled applicator and two separate glass vials. The two glass vials contain
either an activated polyethylene glycol (PEG) ester powder or a polyethyleneimine (PEI) dissolved in sterile water.
The crosslinking components are reconstituted prior to use by their respective reconstitution buffers which are
housed within the applicator. The resulting solutions mix within the extended applicator tip and quickly crosslink to
form the hydrogel sealant soon after exiting the applicator tip. The delivered solution immediately crosslinks to
form a hydrogel sealant which is absorbed over approximately 90 days, sufficient time to allow for healing.
The Adherus AutoSpray ET Dural Sealant device is comprised of the following primary components:
Extended Tip Nozzle
The integrated extended tip nozzle is malleable and may be bent or shaped to preference. The extended tip
nozzle thoroughly mixes the two sealant solutions and delivers the mixed solution to the target site through a tight
spray pattern. The spray nozzle is integral to the system and is not removable.
Vial Adapter Hubs
The vial adapter hubs accept the vials containing the crosslinking components. During the reconstitution phase,
the vials are attached to the vial adapter hubs. After reconstitution is completed, the hubs are removed from the
Adherus AutoSpray ET Dural Sealant device by rotating them counterclockwise. Removing the hubs opens the
pathways for the solutions to flow through the nozzle.
On/Off Push Button Switch
The On/Off switch turns the battery powered air pump on and off. The device is shipped with the switch in the off
position which isolates the air pump from the battery power source. Before removing the vial adapter hubs, push
the On/Off switch to On and the air pump will be engaged.
Battery Door
A door on the underside of the housing allows the operating room (OR) staff to remove the batteries for
appropriate disposal at the end of the device use. The battery door is glued shut. Use a flat instrument to pry the
battery door open and remove the batteries for disposal.
Syringe Pusher Assembly
The syringe pusher assembly mechanically locks the two syringe plungers such that advancement of both syringe
plungers occurs simultaneously.
Indication
Adherus AutoSpray ET Dural Sealant is intended for use as an adjunct to standard methods of dural repair, such
as sutures, to provide watertight closure during cranial and spinal procedures.
Syringe Pusher
Assembly
Vial Adapter Hubs
Extended Tip Nozzle
On/Off Push Button