AIM: To observe the changes in proliferation and apoptosis of macrophages in the development of pulmonary fibrosis in rats. METHODS: The number of macrophages, apoptotic cells, the proliferation index (PI) and MTT activity of macrophages were assayed on the day 14 and the day 30 after intratracheal adminstration BLMA_5 in rats.RESULTS: (1) The number of alveolar macrophages was increased in BLMA_5 14 d group and in BLMA_5 30 d group, compared with sham 14 d group and sham 30 d group, respectively. The number of macrophages in BLMA_5 14 d group was higher than that in BLMA_5 30 d group. (2) The PI of macrophages increased in BLMA_5 14 d group, and decreased in BLMA_5 30 d group. (3) The number of apoptotic cells increased both in BLMA_5 14 d group and BLMA_5 30 d group.The number of apoptotic cells in BLMA_5 14 d group was lower than that in BLMA_5 30 d group. (4) The MTT activity of macrophages was higher in BLMA_5 14 d group and in BLMA_5 30 d group than that in sham 14 d group and sham 30 d group, respectively. CONCLUSIONS: The ability of proliferation increased at first, and then decreased, but the apoptosis of macrophages increased all the time, in the development of pulmonary fibrosis. This might be partly contributed to the changes of the number and function of macrophages in lung.

AIM: To explore the role of NO in the induction of brain ischemic tolerance (BIT) by observing changes of NOS activity and NO_2-/NO_3- content following a transient cerebral ischemia. METHODS: The rat 4-vessel occluding brain ischemic model was used. 140 male Wistar rats were divided into sham, cerebral ischemic preconditioning (CIP), ischemic insult and CIP+ischemic insult groups. An occlusion of the 4 vessels for 3 min was normally used as CIP, and a relative long one for 10 min was used as ischemic insult. When CIP was followed by ischemic insult, the interval between them was 3 d. The CA1 region of the hippocampus of rats was dissected out at 0 h, 2 h, 16 h, 24 h, 36 h, 72 h and 7 d after the last time of ischemia to assay its NOS activity and NO_2-/NO_3- content. RESULTS: The NOS activity and NO_2-/NO_3- content began to increase at 16 h, peaked at 24 h and decreased to basal level at 36 h of reperfusion after CIP. The duration of the up-regulation of NOS activity and NO_2-/NO_3- content was much shorter than that of BIT, which usually takes place 1-7 d after CIP. The pattern of upregulation of the NOS activity and NO_2-/NO_3- content was similar to the CIP group, but the maximum (24 h) was much more than that in CIP group (P

AIM: To study the role of high level of endogenous nitric oxide (NO) in apoptosis of alveolar epithelial cells in the development of pulmonary fibrosis in rats. METHODS: The content of nitrite/nitrate (NO 2-/NO 3-) in out-flowing pulmonary blood (OPB) was assayed by nitric acid reduction method. The apoptosis of alveolar epithelial cells was observed by TdT-mediated dUTP nick-end labeling (TUNEL) and electron microscopy, respectively. The above indices were observed on the day 14 and the day 30 after intratracheal administration of BLMA 5 alone or along with blockade of iNOS by aminoguanidine (AG) in rats. RESULTS: (1) Both the content of NO 2-/NO 3- in OPB and the number of apoptotic alveolar epithelial cells in lung were increased in BLMA 5 14 d group, compared with normal control group and BLMA 5 30 d group, respectively (P

BACKGROUND: Metabotropic glutamate receptor(mGluR) is G-protein coupled membrane receptors, which participate in various physiology or pathology process in brain, but how it induce brain ischemic tolerance(BIT)is unclear.OBJECTIVE: To study roles of mGluR2/3 and mGluR1/5 in the BIT induction.DESIGN: Randomized controlled study based on experimental animals.SETTING: Neurological department of provincial hospital and pathophysiological department of basic institute in a university.MATERIALS: The study was conducted at the Pathophysiological Department, Institute of Basic Medicine, Hebei Medical University from May 2002 to May 2003. Totally 64 healthy male SD rats were selected from the Experimental Animal Center of Hebei Medical University. Glial fibrillary acidic protein (GFAP) antibody, MTPG and(s)-4C3HPG were got from Sigma Company.INTERVENTIONS: 4 vessel occlusion(4VO) brain ischemic models in rats stained with thionine staining and GFAP immunohistochemistry staining. were used. Sixty-four rats, of which bilateral vertebral arteries were occluded permanently by electrocautery, were divided into the following 8groups: sham operation group, cerebral ischemic preconditioning(CIP)group, ischemic insult group; BIT group; MTPG + sham operation group;MTPG+BIT group; MTPG+ischemia group and(s) -4C3HPG+BIT coup. All the rats were killed 7 days after the operation or the final ischemic treatment. Cerebral sections were selected and stained with thionine staining and GFAP immunohistochemistry staining.MAIN OUTCOME MEASURE: The changes of the morphologic hippocampal pyramidal cell and GFAP expression of astrocyte.RESULTS: ① The 8 minutes ischemic insult increased the histological grade(HG) in CA1 area, decreased the pyramidal neuronal density(ND)and increased the expression of GFAP significantly( P ＜ 0.05) . ② The above changes were not observed in the BIT group, indicating that the CIP could protect pyramidal neurons against the 8-minute ischemic insult. ③The protective effects of the CIP were blocked by MTPG or(s)-4C3HPG, as manifested by significant increases in HG and decreases in ND in the groups of MTPG + BIT, MTPG + ischemia and(s)-4C3HPG + BIT( P ＜ 0.05).CONCLUSION: MTPG or (s) -4C3HPG could block the induction of BIT induced by CIP, but mGluR2/3 or mGluR1/5 could participate in the induction of BIT by which protect effect of mGluR is further induced.

OBJECTIVE: To investigate the clinical characteristics, therapeutic efficacy and misdiagnosis status of sphenoid sinus malignant tumor in order to improve the diagnosis rate. METHOD: Analysing and summarizing 18 patients with sphenoid sinus malignant tumor in our department from 1996 to 2005. RESULT: The metastatic nasopharyngeal carcinoma is the most of sphenoid sinus malignant tumor,the second is chordocarcinoma and non-Hodgkin lymphoma, its clinical manifestation was headache (78%), sight alteration (50%), cranial nerve palsy (39%), nose bleed (11%); the clinical diagnosis rate was 56%. CONCLUSION The nasal endoscopy is the convention examination for these patients with sphenoid sinus malignant tumor whose imageology diagnosis is of limitation.
Adult ; Diagnostic Errors ; Endoscopy ; Female ; Humans ; Male ; Middle Aged ; Nasopharyngeal Neoplasms ; diagnosis ; pathology ; Paranasal Sinus Neoplasms ; diagnosis ; Retrospective Studies ; Sphenoid Sinus ; pathology

Objective To explore the perioperative outcomes and safety of enhanced recovery after surgery (ERAS) in laparoscopic radical cystectomy (LRC).Methods We retrospectively evaluated outcome of 10 LRC patients on ERAS protocol from May 2017 to October 2017,and 39 LRC patients on conventional recovery after surgery(CRAS) protocol from July 2015 to November 2016.There were (60.9 ±11.4) years and (63.7 ± 12.1) years in ERAS group and CRAS group respectively(P =0.514);(25.5 ±2.7) kg/m2 and (24.4 ± 3.6) kg/m2 with body mass index (P =0.375).Both of the median of charlson comorbidity index (P =0.931) and American Society of Anesthesiologists score (P =0.254) were 2 There was no statistical significance between the two groups for type of urinary diversion and preoperative laboratory studies (P ＞ 0.05).Patients' perioperative outcomes,early (30-day) complications and postoperative readmission rate were compared.Results The ERAS group had less intraoperative crystalloid infusion [(950.0 ± 474.3) ml vs.(1 797.4 ± 448.1) ml,P ＜ 0.001],faster removed gastric tube (0 d vs.4 d,P ＜0.001),and shorter passing flatus time [(1.6 ± 0.8) d vs.(2.9 ± 1.4) d,P =0.006] than the CRAS group;however,no difference was found in terms of intraoperative colliod infusion [(1 110.0 ± 331.5)ml vs.(1 117.9 ± 397.9) ml,P =0.954].No patients from either group required conversion to open surgery.There was no significant difference between the two groups for operative time (P =0.311),estimated blood loss (P =0.073),drain days (P =0.681),postoperative hospital stay (P =0.509),overall blood transfusion (P =1.000),intensive care unit stay (P =1.000) and tumor characteristics (pathological stage,histology,nodes removed,positive nodes,lymph node-positive patients,positive surgical margins).The 30-day postoperative complications were documented in 5 (50％)and 23 (59％)patients in groups ERAS and CRAS (P =0.878),respectively.And the most common complication were minor complications (Clavien-Dindo grade 1 and 2) in both groups (100.0％ vs.86.9％,P =0.729).The 30-day readmission rate was 20.0％ (2 patients) in ERAS group and 10.3％ (4 patients) in CRAS group with no statistical significance(P =0.588).Conclusions Our ERAS protocol expedited bowel function recovery after RC and urinary diversion without increasing in 30-day complications compared with CRAS.The key of implement ERAS pathway is to explore and develop their own protocol conformed to their medical treatment enviroment.

Background: Cardiopulmonary resuscitation (CPR) strategies in COVID-19 patients differ from those in patients suffering from cardiogenic cardiac arrest. During CPR, both healthcare and non-healthcare workers who provide resuscitation are at risk of infection. The Working Group for Expert Consensus on Prevention and Cardiopulmonary Resuscitation for Cardiac Arrest in COVID-19 has developed this Chinese Expert Consensus to guide clinical practice of CPR in COVID-19 patients. Main recommendations: 1) A medical team should be assigned to evaluate severe and critical COVID-19 for early monitoring of cardiac-arrest warning signs. 2) Psychological counseling and treatment are highly recommended, since sympathetic and vagal abnormalities induced by psychological stress from the COVID-19 pandemic can induce cardiac arrest. 3) Healthcare workers should wear personal protective equipment (PPE). 4) Mouth-to-mouth ventilation should be avoided on patients suspected of having or diagnosed with COVID-19. 5) Hands-only chest compression and mechanical chest compression are recommended. 6) Tracheal-intubation procedures should be optimized and tracheal-intubation strategies should be implemented early. 7) CPR should be provided for 20-30 min. 8) Various factors should be taken into consideration such as the interests of patients and family members, ethics, transmission risks, and laws and regulations governing infectious disease control. Changes in management: The following changes or modifications to CPR strategy in COVID-19 patients are proposed: 1) Healthcare workers should wear PPE. 2) Hands-only chest compression and mechanical chest compression can be implemented to reduce or avoid the spread of viruses by aerosols. 3) Both the benefits to patients and the risk of infection should be considered. 4) Hhealthcare workers should be fully aware of and trained in CPR strategies and procedures specifically for patients with COVID-19.