We quantitatively compared the 3D bone density distributions on CT scans performed on scaphoid waist fractures subacutely that went on to union or nonunion, and assessed whether 2D CT evaluations correlate with 3D bone density evaluations. We constructed 3D models from 17 scaphoid waist fracture CTs performed between four to 18 weeks after fracture that did not unite (nonunion group), 17 age-matched scaphoid waist fracture CTs that healed (union group), and 17 age-matched control CTs without injury (control group). We measured the 3D bone density for the distal and proximal fragments relative to the triquetrum bone density and compared findings among the three groups. We then performed bone density measurements using 2D CT and evaluated the correlation with 3D bone densities. We identified the optimal cutoff with diagnostic values of the 2D method to predict nonunion with receiver operating characteristic (ROC) curves.Aims
Methods
Wrist block has been used to provide pain relief
for many procedures on the hand and wrist but its role in arthroscopy
of the wrist remains unexplored. Chondrotoxicity has been a concern
with the intra-articular infiltration of local anaesthetic. We aimed
to evaluate and compare the analgesic effect of portal and wrist
joint infiltration with a wrist block on the pain experienced by
patients after arthroscopy of the wrist. A prospective, randomised, double-blind trial was designed and
patients undergoing arthroscopy of the wrist under general anaesthesia
as a day case were recruited for the study. Levo-bupivacaine was
used for both techniques. The effects were evaluated using a ten-point
visual analogue scale, and the use of analgesic agents was also
compared. The primary outcomes for statistical analyses were the
mean pain scores and the use of analgesia post-operatively. A total of 34 patients (63% females) were recruited to the portal
and joint infiltration group and 32 patients (59% males) to the
wrist block group. Mean age was 40.8 years in the first group and
39.7 years in the second group (p >
0.05). Both techniques provided
effective pain relief in the first hour and 24 hours post-operatively
but wrist block gave better pain scores at bedtime on the day of
surgery (p = 0.007) and at 24 hours post-operatively (p = 0.006). Wrist block provides better and more reliable analgesia in patients
undergoing arthroscopy of the wrist without exposing patients to
the risk of chondrotoxicity. Cite this article:
