
1
L9 Orthopedic D. Wahby Ghalib
Hand Infections
Paronychia
Infection of nail fold
Predisposition : DM
Exposure to water or
irritants
S. aureus
Rx
ABC
Abscess
drainage by incision at the angle
of the nail
Subungual abcess
remove the nail
Cx
Abscess
Chronic paronychia : inadequate Rx or fungal infection
Osteomyelitis
Felon (pulp space infection)
Pulp space is closed space filled with fat
and subdivided by fibrous septa
It contains terminal branch of the digital
artery that supplies distal phalanx
Follows prick injury
S. Aureus
Rx : ABC
drainage
Cx
Spread of infection : bone, joint or flexor
tendon
Thrombosis of digital a.
necrosis of distal
phalanx

2
Suppurative tenosynovitis
Anatomy
FPL synovial sheath (radial bursa): from wrist to its insertion
Common flexor synovial sheath ( ulnar bursa)
Distally ends blindly at level of proximal crease
Except at little finger
Separate synovial sheaths for the middle 3 digits
In 50 % of people ulnar & radial bursae communicate
Space of Parona : fascial space between FDP anteriorly & PQ & interosseous
membrane posteriorly
Cardinal signs of Kanavel
Sausage - like swelling
Finger held in flexion
Painful passive extension
Tenderness along the course of tendon
o Infection follows penetrating injury
o S. aureus
o Rx : ABC
o IF no response after 24 hrs
drainage

3
Cx
Tendon necrosis
Spread of infection : ulnar and radial bursae
o space of Parona
Median nerve compression
Deep space infection
2 deep spaces in the hand by an oblique
septum between palmar aponeurosis & 3
rd
MCB
Midpalmar & thenar
Contain flexor tendons & lumbricals
Penetrating injury
Spread from web space or tendon sheath
S. aureus
Pain & swelling in the dorsal aspect
Rx : ABC drainage
Septic arthritis
S. aureus
If no response to ABC after 24 hr
drainage
Animal bite
May be infected : Staphylococci or Streptococci
Dogs & cats : consider Pasturella multocida (G-ve rods)
Human bite
Staphylococci or Streptococci
Eikenella corrodens
Rx : ABC
o debridement
Mubark A. Wilkins