To compare the conventional anterior nasal packing (CANP) with Hydroxylated polyvinyl acetate pack (Merocele) after septoplasty, in terms of pain, bleeding, and postoperative complications like synechia formation. Material and MethodsThis study was a prospective, randomized, interventional study conducted among 48 patients. Patients underwent septoplasty under general anesthesia for symptomatic deviated nasal septum. In all the 48 patients, post-surgery, one nasal cavity was packed with a conventional nasal pack and the other cavity was packed with Merocele nasal pack. Pain and bleeding were evaluated during pack removal on the third post-operative day. Synechia was assessed at the 8th postoperative week (2 months) follow-up. The results were compared between the two groups. ResultOut of 48 patients who underwent surgery, 3 patients were lost to follow-up. So, results were compared between 45 patients. Pain and bleeding during removal of conventional and merocele packs were not seen to be statistically significant. Post-operative synechia was not seen in any of the nasal cavities, irrespective of the packing material used. ConclusionHence, in terms of pain, bleeding during pack removal, and post-operative synechia; conventional and merocele nasal packs were comparable and there was no significant difference in using either of the materials post-septoplasty..
The geographical condition of Nepal has always challenged the hydropower plants in Nepal. The huge potential run-off rivers flowing through this terrain carry an immense amount of sediment. This sediment constitutes quartz particles with enough hardness, which corrodes the material of the hydraulic turbines and other components of the hydropower plant. The sediment erosion hindered the growth of hydropower plants as it significantly increased the maintenance cost and decreased the efficiency and life span of the plant itself. This paper takes this problem into account to investigate the structural integrity of one of the reference cases of eroded low head Francis turbine of Nepal by performing one-way FSI. CFD analysis was conducted on the single passage of the runner and structural analysis of the runner was conducted as well. For the structural integrity, the thickness of the blade at the trailing edge was decreased to 80 percent of its span. From the results of the structural integrity, the stresses imposed on the reference runner due to the erosion were observed to be within the allowable stress even in the extreme case condition.
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