We used near-infrared spectroscopy technology to monitor and assess the treatment effect of dehydrating agent in injured rat brain in real time style. We employed the brain edema model in rats resulting from Feeney's freefall damage, then treated with different doses of mannitol, and collected reduced scattering coefficient (μ's) and intracranial pressure (ICP) values after the injury and during the treatment. The results showed that brain edema happened 1 h after the injury in rats' brain tissue, peaked around 72 h after injury, and then began to decrease gradually. The reduced scattering coefficient and ICP values of the treatment group injected with mannitol all decreased after administration. Compared with the effect of low-dose mannitol treatment, that of high-dose mannitol treatment was much better. The duration of the plateau was longer and most experiments results declined significantly. From this we conclude that the reduced scattering coefficient and ICP are consistent with the trend changes, and the reduced scattering coefficient could be used as an indicator for monitoring cerebral edema.
ObjectiveTo compare the effect of intravenous 20% mannitol or dexamethasone (DM) on low back and leg pain after minimally invasive transforaminal lumbar interbody fusion (MI-TLIF). MethodsBetween October 2012 and September 2013, 100 patients with degenerative lumbar diseases underwent MI-TLIF and percutaneous pedicle screw fixation. All patients were randomly divided into 3 groups:34 patients received intravenous 20% mannitol after operation (mannitol group); 32 patients received intravenous DM after operation (DM group); and 34 patients received neither dehydrating agent nor steroid after operation (control group). There was no significant difference in gender, age, disease duration, clinical symptoms, lesion types, and lesion segments between groups (P>0.05). The serum levels of inflammatory factors[tumor necrosis factor α (TNF-α), interleukin 1β (IL-1β), and IL-6] were measured by ELISA at pre-operation and 3, 24, 48, 72, and 96 hours after operation. Low back and leg pain was determined by using visual analogue scale (VAS) score after operation. ResultsAll procedures were smoothly performed without major complications of nerve root injury, hematoma, or infection. There was no significant difference in operation time and intraoperative blood loss between groups (P>0.05). The VAS score of low back pain showed no significant difference between groups at all time points after operation (P>0.05); the VAS score of leg pain in the DM group was significantly lower than that in the control group at all time points (P<0.05), and than those in the mannitol group at 3, 24, 48, and 96 hours after operation (P<0.05). The serum level of TNF-α in the DM group was significantly lower than that in the control group at all time points (P<0.05), and than that in the mannitol group at 3, 48, 72, and 96 hours after operation (P<0.05). The serum level of IL-1β in the DM group was significantly lower than that in the control group at 3, 24, 48, and 72 hours after operation (P<0.05), and than that in the mannitol group at all time points after operation (P<0.05). The serum level of IL-6 in the DM group was significantly lower than that in the control group at 3 and 24 hours after operation (P<0.05), and than that in the mannitol group at 3, 24, and 48 hours after operation (P<0.05). ConclusionIntravenous 20% mannitol may has no effect on postoperative low back and leg pain, while DM can markedly relieve leg pain after MI-TLIF.
This study aimed to assess the therapeutic effect of mannital administration on acute hemorrhagic necrotizing pancreatitis (AHNP), 28 Wistar rats were randomily divided into therapeutic group and control group after induction of AHNP by retrograde intraductal injection of 5 percent sodium taurocholate. The rats of therapeutic group received intravenous 20% mannital (1g/kg) through tail vein, once in 12 hours, until the end of experiment; control group received saline (5.0 ml/kg) with the same way. Blood of all the rats were collected from heart and the rats were killed after 96 hours. Results: lipid peroxide (LPO) in pancreatic tissue, LPO in serum, lactate dehydrogenase (LDH), alpha-1-antitrypsin (α1-AT), glutamicoxalacetic transaminase (GOT), necrotizing square of pancreatic tissue in the therapeutic group were significantly less than those in control group (Ｐ＜0.05 or Ｐ＜0.01). The damage to pancrease, heart, liver, kidney in the therapeutic group were lighter than those of the control group and the mortality was lower (Ｐ＜0.05).Conclusions: Mannital can scavenge the oxygenderived free radicals and play a therapeutic role in AHNP.