the open end may include adhesive on the interior surface the wound chamber device 120 includes engineered structures 40 and channels 49 on the interior surface of the chamber wall as shown in fig2 a fluid collector 60 may be positioned on the tube 32 between the chamber 22 and the suction device 34 the collector 60 is intended to receive fluid extracted from the chamber space 24 and debris or material from the wound and store such materials for eventual disposal the collector 60 may be detachable from the tube 32 in order to replace a full collector with an empty collector suction for the wound treatment device is provided by a suction device 34 which may be a pump that is connected and disconnected to the chamber device by appropriate connectors although the wound chamber can be used with a motor driven pump it is also effective with a hand powered device actuated by the caregiver or patient the hand powered device may be a squeeze bulb that provides suction by means of the energy stored in the material of its construction alternatively the suction device may be powered by springs that are compressed by the user the springs can be selected to produce the clinically desired level of negative pressure the amount of suction provided by these suction devices is therefore dependent on the level of force generated by squeezed material or the springs unlike a motor driven suction pump the hand powered device preferably cannot produce a high level of suction that may.