Flexor digitorum profundus tendons

So if we were to design barbed sutures for use with tissue anchors, the surface contact between the suture and the anchor eyelet should have minimum friction, which is possible by having no barbs in that region of the suture. The suture can go into the eyelet only once when anastomosing a distal flexor digitorum profundus tendon to the distal phalanx. 

All these tendons insert in the volar surface of the 2nd phalanx. Before inserting in the phalanx, the tendon split in two bands to allow the flexor digitorum profundus tendon to go through and to reach the proximal end of the distal phalanx. 

At the volar aspect of the wrist, nine flexor tendons enter the carpal tunnel to reach the fingers. There are four tendons from the flexor digitorum superficialis for the second through fifth fingers, four from the flexor digitorum profundus for the same fingers and the flexor pollicis longus tendon. 

Fig. 10.27a,b. Bifid median nerve, a Schematic drawing and b corresponding transverse 12-5 MHz US image over the ventral wrist in an asymptomatic subject reveal the radial and ulnar trunks (arrows) of a bifid median nerve. Sea, scaphoid Pis, pisiform Jpl, flexor pollicis longus tendon p and s, the tendons of the flexor digitorum profundus and superficialis... 

Fig. 11.35. Flexor synovial sheaths in the hand and fingers. Schematic drawing of a palmar view of the hand demonstrates the continuity of the carpal synovial sheath of flexor tendons (red) with the sheath of the little finger. The flexor tendons for the index, middle and ring fingers have isolated sheaths (yellow) extending from the metacarpal neck down to a level just proximal to the insertion of the flexor digitorum profundus on the distal phalanx. The carpal sheath of the flexor pol-licis longus tendon (blue) is separated from the carpal synovial sheath and usually continues down to the tendon insertion...

Tears of the flexor tendons are varied and complex, involving the flexor digitorum superficialis, the flexor digitorum profundus or both tendons in one single finger or more tendons in adjacent fingers when extensive sharp injuries across the palm or the ventral aspect of the fingers occur. As a rule, in distal... 

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