ABSTRACT
Objective To analyze the occurrence of the complications after percutaneous endoscopic lumbar discectomy (PELD) for lumbar disc herniation or stenosis,and to reveal the effective prevention methods.Methods Retrospectively analyzed the clinical data of 568 cases who undertaken PELD,and all the related complications,possible causes,prevention and treatment methods were analyzed.Results There were 24 cases of complications occured in all the 568 cases treated with PELD,and the gross incidence rate was 4.23％,including 4 cases of dural laceration(0.70％),3 cases of hemorrhage of intravertebral vein plexus injury(0.53％),6 cases of postoperative wound pain (1.06％),8 cases of postoperative recurrence (1.41％),1 case with persistent symptoms after surgery (0.18％),2 cases of postoperative paresthesia(0.35％).Conclusion PELD is a minimally invasive surgery with high security and low incidence of complications.The effective preventions including careful decision-making,elaborate operation,and precise identification of the anatomical abnormality.
ABSTRACT
Objective To explore the operative indications and efficacy of intervertebral foramen puncture combined with internal fixa -tion via paraspinal approach in the treatment of lumbosacral tuberculosis .Methods A total of 69 patients who treated with intervertebral fo-ramen puncture combined with internal fixation via paraspinal approach in spinal surgery department of Daping hospital affiliated to army medical university from January 2010 to January 2017 were retrospectively analyzed .All patients had preoperative standardized oral isoniazid , rifampicin,pyrazinamide,ethambutol for 2 to 4 weeks.The surgical methods included intervertebral foramen puncture ,drainage of paraverte-bral abscess and posterior paraspinal muscle gap approach fixation .The surgery time,intraoperative blood loss ,postoperation drainage ,abscess absorption,healing of lesions and Oswestry scores were recorded and observed .Results The operation time was from 130 to 220 minutes, with average of 140 minutes;the blood loss was from 50 to 150 mL,with average of 110 mL;the total volume of drainage was 30 to 180 mL, with average of 70 mL.All patients were followed up for 12 to 21 months.All cases were recovered except 1 patient who suffered from sacral tuberculosis received debridement and suturing caused by cutaneous necrosis .There was no infection , injury of spinal cord and nerve nor looseness or shift of internal fixation .The abscess was completely absorbed after 12 months.The Oswestry scores before surgery was (68.15 ± 18.36),while it was(11.64 ±8.12) at final followed-up,the difference was significant(P<0.05).Conclusion The surgical treatment of intervertebral foramen puncture combined with internal fixation via paraspinal approach is effective for patients who suffered large paraverte -bral abscess, parts of vertebral body collapse with segmental instability and mild kyphosis of spine with spinal cord disfunction ,which is a safe and effective surgical method .
ABSTRACT
<p><b>OBJECTIVE</b>To analyze the clinical features and prognosis of the primary myelodysplastic syndrome with myelofibrosis (MDS-MF) patients and to improve the cognition of MDS-MF.</p><p><b>METHODS</b>Four hundred and sixty-six primary MDS patients with bone marrow (BM) biopsy were divided into two groups according to whether BM associated with fibrosis, the clinical features and prognosis of the two groups were analyzed retrospectively.</p><p><b>RESULTS</b>167 (35.8%) MDS cases revealed myelofibrosis, of which MF-1 123 cases (26.4%), MF-2 40 cases (8.6%), MF-3 4 cases (0.9%). The proportion of hepatosplenomegaly in MDS-MF group was significantly higher than in MDS without MF group, the difference had statistical significance (P = 0.031). The proliferation of BM biopsy in MDS-MF group was significantly more active than in MDS without MF group. The number of blasts, megakaryocytes and abnormal megakaryocytes in MDS-MF group were significantly higher than in MDS without MF group, the differences had statistical significance (P < 0.05). Among the 345 patients who had available results of cytogenetic analysis, 121 cases were MDS-MF patients, the proportion of middle and high-risk prognostic group according to IPSS karyotype prognosis groups in MDS-MF group were significantly higher than in MDS without MF group, the differences had statistical significance (P = 0.047). The median survival was 17 (1 - 60) months in MDS-MF group, and was 32 (1 - 62) months in MDS without MF group. The difference had statistical significance (P = 0.001). Myelofibrosis had independent prognostic significance by multi-variable analysis (P = 0.019).</p><p><b>CONCLUSION</b>The myelofibrosis in MDS is main the proliferation of reticular fiber. The proliferation of reticular fiber is closely related with the number of blast cells, the proliferation and developmental abnormalities of megakaryocytes and the karyotype. The prognosis of MDS-MF patients is poor.</p>
Subject(s)
Adolescent , Adult , Aged , Aged, 80 and over , Child , Female , Humans , Male , Middle Aged , Young Adult , Karyotyping , Myelodysplastic Syndromes , Diagnosis , Pathology , Primary Myelofibrosis , Diagnosis , Pathology , Prognosis , Retrospective StudiesABSTRACT
Nitrobenzene is one of the toxic compounds. Much work had focused on biodegradation of it sofar. Two main pathways for nitrobenzene biodegradation, oxidative and partial reductive pathways, were reviewed in this article. The mechanism of these pathways including involved enzymes and genes was introduce in details. Comparative analysis of the pathways would provide basis for the development and application of biodegradation technology for nitrobenzene and other organic pollutants.