Devices and methods for compressing a digit to facilitate removal of a ring

Abstract

A compression device for freeing a ring trapped on a digit includes a rigid outer body. The rigid outer body includes a digit cavity extending from a cavity opening at a body proximal end of the body towards a body distal end of the body, a fluid inlet, and a fluid flow path fluidly connecting the fluid inlet to one or more inflation chambers positioned in the digit cavity. The body proximal end includes an upper portion, a lower portion, and two laterally spaced-apart side portions. At least one side portion is distally recessed as compared to the upper and lower portions to accommodate an interdigital fold. At least one flexible bladder lines the digit cavity, each flexible bladder defining at least one wall of one of the one or more inflation chambers.

1 . A compression device for freeing a ring trapped on a digit, the compression device comprising:
 an outer body extending from a body proximal end to a body distal end, the outer body comprising:
 a digit cavity extending from a cavity proximal opening at the body proximal end, and a fluid inlet; 
   a bladder including a bladder intermediate portion joining a bladder proximal portion to a bladder distal portion, the bladder intermediate portion located inside the digit cavity,
 wherein the bladder at least partially defines an inflation chamber inside the digit cavity, and the fluid inlet is fluidly connected to the inflation chamber; and 
   a controller having one or more processors, and a memory storing computer readable instructions that when executed by the one or more processors configure the one or more processors to collectively:
 direct a fluid source to supply fluid through the fluid inlet into the inflation chamber, 
 while directing the fluid source to supply fluid, receive signals indicative of a fluid pressure in the inflation chamber, and 
 direct the fluid source to slow or stop supplying fluid into the inflation chamber in response to determining that the fluid pressure in the inflation chamber has reached a predetermined target pressure. 
   
     
     
         2 . The compression device of  claim 1 , wherein:
 the predetermined target pressure is a value of at least 150 mmHg.   
     
     
         3 . The compression device of  claim 1 , wherein:
 the bladder proximal portion overlies the body proximal end, and the bladder distal portion overlies the body distal end.   
     
     
         4 . The compression device of  claim 1 , further comprising:
 at least one bladder engagement member that is releasably engageable with the outer body,   each bladder engagement member, when engaged, compressing at least one of the bladder proximal portion and the bladder distal portion against the outer body to provide a fluid tight seal between the bladder and the outer body.   
     
     
         5 . The compression device of  claim 4 , wherein:
 each bladder engagement member comprises a removable end cap.   
     
     
         6 . The compression device of  claim 4 , wherein:
 each bladder engagement member, when engaged, overlies a portion of the outer body and the bladder.   
     
     
         7 . The compression device of  claim 1 , further comprising:
 a proximal bladder engagement member and a distal bladder engagement member, each of the proximal and distal bladder engagement members engageable with the outer body,   each bladder engagement member, when engaged, compressing a respective one of the bladder proximal portion and the bladder distal portion against the outer body to provide a fluid tight seal between the bladder and the outer body.   
     
     
         8 . The compression device of  claim 1 , wherein:
 each of the bladder proximal portion and the bladder distal portion is folded over an exterior surface of the outer body.   
     
     
         9 . The compression device of  claim 1 , further comprising:
 a valve located upstream of the inflation chamber, the valve being openable to admit pressurized fluid into the inflation chamber, and sealable to seal pressurized fluid in the inflation chamber.   
     
     
         10 . The compression device of  claim 9 , wherein:
 the valve is part of a fluid conduit connector that provides connectivity for an upstream pressurized fluid supply conduit, and the valve is sealable when the fluid conduit connector is disconnected from the upstream pressurized fluid supply conduit.   
     
     
         11 . The compression device of  claim 10 , wherein:
 the valve automatically seals when the fluid conduit connector is disconnected from the upstream pressurized fluid supply conduit.   
     
     
         12 . The compression device of  claim 1 , further comprising:
 a user feedback device connected to the outer body, the user feedback device providing at least one of visual, auditory, and haptic indicia of progress in a digit compression procedure.   
     
     
         13 . A compression device for freeing a ring trapped on a digit, the compression device comprising:
 an outer body extending from a body proximal portion having a body proximal end to a body distal portion having a body distal end, the outer body comprising:
 a digit cavity extending from a cavity proximal opening at the body proximal end, and 
 a fluid inlet; and 
   a bladder including a bladder intermediate portion joining a bladder proximal portion to a bladder distal portion, the bladder intermediate portion located inside the digit cavity,
 wherein the bladder at least partially defines an inflation chamber inside the digit cavity, and the fluid inlet is fluidly connected to the inflation chamber; and 
   a user feedback device connected to the outer body, the user feedback device providing at least one of visual, auditory, and haptic indicia of progress in a digit compression procedure.