RESUMO
Treatment of tris(3-cyano-2,4-pentanedionato)manganese(III) with KTp*, followed by [NEt(4)]CN affords [NEt(4)][(Tp*)Mn(III)(CN)(3)] (1); subsequent treatment of 1 with divalent triflates (OTf) and 2,2'-bipyridine (bpy) affords {Mn(III)(2)M(II)(2)} complexes (M(II) = Mn, 2; Ni, 3). Magnetic measurements show that 1-3 exhibit S(T) = 1, 3, and 4 spin ground states, respectively.
RESUMO
OBJECTIVE: To evaluate the impact of spleen weight on operative and clinical outcome in a series of 108 consecutive laparoscopic splenectomies. BACKGROUND: Laparoscopic splenectomy as an alternative to open splenectomy for splenomegaly is regarded as controversial. METHODS: Patients underwent laparoscopic splenectomy for a range of hematological disorders between November 1992 and February 2000. Multiple linear and logistic regression analysis were used to assess the effect of massive splenomegaly (>1000 g) on perioperative mortality and morbidity, after adjusting for the joint effects of patient age, weight, pre- and postoperative full blood counts, operating time, estimated blood loss, conversion rate, reoperation rate, and duration of hospital stay. RESULTS: Massive splenomegaly was recorded in 27 of 108 (25%) cases. In this group, splenic weight ranged from 1000 to 4750 g (median, 2500 g). Patients with splenic weight >1000 g had a significantly longer median operating time (170 vs. 102 minutes, P < 0.01), conversion rate (5/27 vs. 4/81, P < 0.05), postoperative morbidity (15/27 vs. 4/81, P < 0.01), and median postoperative stay (5 vs. 3 days, P < 0.01). Multivariate analysis found splenic weight to be the most powerful predictor of morbidity (P < 0.01). Patients with splenomegaly (>1000 g) were 14 times likely to have post operative complications. One patient died 3 days after surgery, following a pulmonary embolus (spleen weight 500 g, mortality 1/108, 0.9%). CONCLUSIONS: Laparoscopic splenectomy is feasible in patients with giant spleens. However, it is associated with greater morbidity, and the advantages of minimal access surgery in this subgroup of patients are not so clear.