Objective: Using computer-assisted navigation technology to guide the resection and reconstruction of mandibular ameloblastoma, evaluating its treatment effect. Methods : Twelve patients were selected from the Affiliated Stomatological Hospital of Nanjing University from January 2017 to May 2022. All 12 patients accepted same surgery which included resection of mandibular ameloblastoma and reconstruction by fibula musculocutaneous flap. Among them, 6 cases were included in the navigation group; 6 cases were in the non-navigation group. Advantages and disadvantages of computer-assisted navigation technology in this operation were evaluated with these cases. Results: The 12 operations were performed by the same operator. The average time for fixing the navigation bracket and performing navigation in the navigation group was about 15 minutes. Compared with the non-navigation group, the average operation time in the navigation group was shortened by about 10 minutes. In the navigation group, the mandible resection range matched the fibula musculocutaneous flap well, and the occlusal relationship recovered well. Conclusion Using the mandibular reference frame, under the guidance of computer-assisted navigation technology, the resection and reconstruction of mandibular ameloblastoma can be performed quickly and accurately.

Objective To evaluate the effect of hyperlipidemia on pulmonary uptake in the patients inhaling sevoflurane for anesthesia.Methods A total of 103 patients of both sexes,aged 20-50 yr,with body mass index of 18-25 kg/m2,of American.Society of Anesthesiologists physical status Ⅰ or Ⅱ,undergoing elective operation under general anesthesia,were enrolled in the study.Anesthesia was induced with iv midazolam 0.1 mg/kg,vecuronium 0.1 mg/kg,fentanyl 0.l mg/kg and etomidate 0.3 mg/kg.Patients were mechanically ventilated after endotracheal intubation.Patients inhaled 2％ sevoflurane for 30 min at an oxygen flow rate of 2 L/min.The inspired concentrations (Fi) and expired concentrations (Fe,Fe≈alveolar concentration [Fa]) of sevoflurane were recorded at 1,3,5,7,10,15,20 and 30 min of inhalation (T0-7).Patients were divided into either control group group C) or hyperlipidemia group (group H) according to the results of blood lipid levels after the end of observation.The ratio of Fa/Fi and time spent in reaching the titration value (Fa/Fi =0.8) were calculated in each group.Results There were 67 cases in group C and 36 cases in group H.Compared with group C,the Fa/Fi ratio was significantly decreased at 5,7 and 10 min of inhalation,and the time spent in reaching the titration value was prolonged in group H (P ＜ 0.05).Conclusion The pulmonary uptake of sevoflurane is increased,which may be associated with increased blood/gas partition coefficient.

OBJECTIVE: To investigate the new surgical pathway of endoscopic frontal sinus surgery for frontal sinus lesions through the upper-agger nasi approach. METHOD: The computed tomography (CT) scans from 32 patients were collected and subjected to three-dimensional reconstruction by Mimics. The distance in sagittal planes from anterior ethmoid artery to midpoint of axilla and to skull base attachment at anterior middle turbinate was measured. The distance in coronal planes between the perpendicular plate of middle turbinate and the orbital lamina was also detected as well as the height of agger nasi. Three-dimensional structures of the frontal sinus and its surrounding cells was reconstructed by Sinuses Trachea I software. We integrated the CT scans and the above data for simulating surgical operation on cadaveric heads. RESULT: (1) Skull base attachment at anterior middle turbinate located at the anterior or posterior of aperture of frontal sinus. (2) The mean distance between anterior ethmoid artery and midpoint of axilla was (22.23 ± 2.78) mm on the left side and (22.30 ± 2.80) mm on right. The mean distance between anterior ethmoid artery and skull base attachment at anterior middle turbinate was (15.31 ± 2.82) mm on left and (15.39 ± 3.53) mm on right. The distance between perpendicular plate of middle turbinate and orbital lamina was (7.61 ± 1.34) mm on left and (7.80 ± 1.40) mm on right side. The height of the agger nasi was (8.33 ± 2.14) mm on left and (8.00 ± 2.57) mm on right. There was no statistical difference in the above data between left and right side (P > 0.05). (3) The visible three-dimensional structure showed that skull base attachment at the anterior middle turbinate was closely adjoined the aperture of frontal sinus, the space between sub-outer side of the attachment and orbital lamina, above the agger nasi cell or the upper area of the agger nasi cell was solely cell structures. CONCLUSION Endoscopic frontal sinus surgery for frontal sinus lesions through the upper-agger nasi approach was practicable to solitary frontal sinus lesions and to solve the complex frontal sinus or frontal recess lesions by flexible operation according to the feature of the lesions.
Axilla ; Bone Plates ; Endoscopy ; Frontal Sinus ; surgery ; Humans ; Nasal Cavity ; Nose ; Paranasal Sinus Neoplasms ; surgery ; Paranasal Sinuses ; Skull Base ; Software ; Tomography, X-Ray Computed ; Trachea ; Turbinates

OBJECTIVE: To investigate the possibility and anatomy landmark of the frontal beak approach of endoscopic frontal sinusotomy to the frontal sinus lesions. METHOD: (1)Twenty cases of frozen cadaveric head underwent spiral computed tomography scans. Then data were transferred into the Mimics image workstation to reorganize CT images in the coronal, sagittal, and axial planes. The anatomic parameters related to surgical approach points were measured, such as the distance between vertical plate of the middle turbinate and lamina papyracea and the thickness of the frontal beak. (2) 3D visual model of the frontal cell and the drainage way of the frontal sinus was produced with the application of Sinuses Trachea I software. (3)The endoscopic frontal sinus surgery were performed on 20 cases of subjects (objects)to find out the anatomy landmarks of the frontal beak approach, measure the parameters such as the distance between middle turbinate and lamina papyracea, and evaluate the potential surgical complications during operation. RESULT: (1)The frontal beak is a white bony arcs located at the attachment point of middle turbinate front inserted to the skull base. Its position was relatively constant, before frontal sinus above. (2)The distance between the middle turbinate vertical plate and lamina papyracea was (7. 61 ± 1. 34) mm. The thickness of the frontal beak in surgical approach was (3. 27 ± 0. 91) mm. (3) 3D visual structure of the frontal sinus and its ventilation pathway: the shape of unilateral frontal sinus looked like the cone, which was transited by the drainage pathway of the frontal sinus. The front part of the frontal sinus ostium is surrounded by the frontal beak. The upper part the frontal beak connected to the floor of the frontal sinus. (4) Frontal beak can be used as an landmark of frontal beak approach in the endoscopic frontal sinus surgery. But the lateral view of frontal sinus still was limited in the operation. CONCLUSION The endoscopic frontal sinus surgery with the approach of the frontal beak is easy to operate and learn. In this area between the double "L", the operation is safe.
Anatomic Landmarks ; Endoscopy ; methods ; Frontal Sinus ; surgery ; Humans ; Skull Base ; Software ; Tomography, Spiral Computed ; Tomography, X-Ray Computed ; Turbinates ; anatomy & histology

Objective To establish the reference intervals(RIs) for plasma presepsin in healthy population.Methods The document C28-A3 issued by CLSI was a guideline about how to define,establish,and verify reference intervals in the clinical laboratory.Plasma values were determined with CLEIA for 1 250 healthy adults(aged 20-90 years old),including 624 males and 626 females.The central 95 percentile of RIs were determined using nonparametric statistical methods.Results The presepsin values in elderly population showed a Gaussian distribution and age/sex related changes.The RIs for plasma presepsin in the reference population respective of age(ranged from 20-＜30,30-＜ 60,60-＜ 90 years) were 50-195,47-170,41-142 pg/mL for males and 43-173,44-162,38-137 pg/mL for females respectively.Conclusion The RIs for plasma presepsin were established according to the gender and age groups in the healthy adults,and could provide a reference for the clinical and laboratory.

Objective To investigate the effect of long-term walking exercise on the health status of low-labor-intensity population under long-term walking exercise.Methods A total of 100 volunteer teachers from universities in Beijing were enrolled.After physical examination,they were randomly divided into control group and observation group.The observation group regularly carried out corresponding encouragingactivities and recorded the daily number of steps.The corresponding indexes were measured again after 450 days.Results 45.24％ participants in the observation group got more than 75％ participation rate.The lower the participation rate,the lower the average daily steps (P ＜ 0.05).The fasting blood glucose,systolic blood pressure,LDL and total cholesterol were lower than other groups in the group participation rate ＜25％ (P ＜0,05).The body mass index,systolic blood pressure,fasting blood glucose,total cholesterol,ratio diabetes and hypertension in low activities group (＜ 7 500 steps/day) were lower than those in other groups (P ＜ 0.05).Conclusions Walking exercise can achieve good long-term persistence with constant feedback.For those who are older and whose initial indicators are higher,participation rate and exercise volume are more likely to be better under the guidance of encouragement.Persisting long-term walking exercise can help reduce blood pressure and blood lipids.

Objective: To investigate the possible role of IL17-and IL22-secreting cells combined with patch test for the prediction of formaldehyde-induced occupational allergic contact dermatitis(OACD). Methods: From October 2014 to October 2016, totally 131 formaldehyde-exposed workers(49 cases with inflammatory skin lesions,82 ones without inflammatory skin lesions)and 63 non-exposed health controls were recruited. Patch-test was performed in 49 cases of formaldehyde-exposed workers with inflammatory skin lesions. Circulating IL17+and IL22+Tcell subsets were assessed by flow cytometry(FCM). Results: Among 49 cases of formaldehyde-exposed workers with inflammatory skin lesions,32 cases were with positive patch-test while 17 cases with negative patch-test. The proportions of circulating CD3+CD8-IL17+ and CD3+CD8-IL22+ cells from patch-test(+) formaldehyde-exposed workers were significantly higher than that of patch-test(-)group, formaldehyde-exposed workers without skin lesions and non-exposed controls(P<0.05). The proportions of circulating CD3+CD8-IL17+ and CD3+CD8-IL22+cells from patch-test(-)group and formaldehyde-exposed workers without skin lesions were also higher than that of non-exposed controls(P<0.05). But there was no significant difference between patch-test(-)group and formaldehyde-exposed workers without skin lesions(P>0.05). Peripheral CD3+CD8+IL17+and CD3+CD8+IL22+cells were also detected in spite of small amounts. The percentages of CD3+CD8+IL17+and CD3+CD8+IL22+ cells inperipheral blood from patch-test(+)formaldehyde-exposed workers were enhanced significantly, compared to patch-test(-)group, formaldehyde-exposed workers without skin lesions and non-exposed controls(P<0.05). The proportions of circulating CD3+CD8+IL17+ and CD3+CD8+IL22+ cells from patch-test(-)group and formaldehyde-exposed workers without skin lesions were significantly higher than that of non-exposed controls(P<0.05). But there was no significant difference between patch-test(-) group and formaldehyde-exposed workers without skin lesions(P>0.05). Conclusion The proportions of circulating IL17+ and IL22+T cells(both CD8-and CD8+)are enhanced in formaldehyde-exposed workers at proposed OEL, possibly involved in the development of formaldehyde-induced OACD.The detection of IL17-and IL22-secreting cells combined with formaldehyde patch test help to screen the workers with allergy property and prevent OACD.

Objective:To compare the clinical effects of external-internal four paper splints fixation at a fixed point with the routine paper splint fixation in the treatment of the unstable distal radius fracture.Methods:A total of 66 patients with type C1 or C2 distal radial fractures, from November 2016 to May 2019, were analyzed retrospectively. According to different external fixation methods, patients were divided into 2 groups with 33 patients in each group. Modified group treated with external-internal four paper splint fixation at a fixed point and normal group treated with routine paper splint fixation. The 4th and 6th weeks after the operation, the reduction of the distal radius fracture was evaluated based on anteroposterior and lateral wrist radiographs. After 3 months follow-up, the radial height, radial inclination and palm dip angle were measured and the healing time were recorded. The Gartland-Werley functional scale was used to evaluate the wrist function from four aspects of residual malformation, subjective evaluation, objective evaluation and complications, and to evaluate the clinical efficacy.Results:After 3 months follow-up, all patients got clinical healing. The loss of palm dip angle [(2.9 ± 2.4)° vs. (4.6 ± 3.2)°, t=-2.524], radial inclination [(3.4 ± 2.2)° vs. (5.0 ± 3.0)°, t=-2.506] and radial height [(2.4 ± 1.9) mm vs. (3.6 ± 2.1) mm, t=-2.302] in modified group were significantly less than those in normal group ( P<0.05). There was a lower Gartland-Werley score in modified group compared with normal group [(1.52 ± 2.75) vs. (5.76 ± 8.68); t=-2.677, P<0.05]. The excellent and good rate was 97.0% (32/33) in the modified group and 78.8% (26/33) in the nomal group. There was significant difference between two groups ( Z=-2.315, P=0.021). Conclusions:The external-internal four paper splint fixation at a fixed point can control the redisplacement of unstable distal radius fractures effectively, and maintain the reduction. The effect of modified paper splint fixation at a fixed point is better than routine paper splint fixation.

Objective: To investigate awareness of digestive system injury caused by corona virus disease 2019 (COVID-19) in gastroenterologists. Methods: From February 21 to 23 in 2020, the electronic questionnaire was sent out to explore the condition of the basic knowledge of COVID-19 and knowledge of digestive system injury caused by COVID-19 grasped by gastroenterologists. Chi-square test was used for statistical analysis. Results: A total of 2 216 gastroenterologists from 31 provinces, autonomous regions and municipalities nationwide completed the survey. 99.7% (2 209/2 216) of gastroenterologists stated that they had read the COVID-19 diagnosis and treatment guidelines. The percentage of physicians who well knew the diagnostic criteria of suspected and confirmed cases of COVID-19 was 34.9% (774/2 216) and 39.4% (874/2 216), respectively. The percentage of physician who gave the right answer of COVID-19 detectable methods and lung imaging was 68.4% (1 516/2 216) and 71.6% (1 586/2 216), respectively. The percentage of correct answer of digestive system injury caused by COVID-19 in residents, attending physicians, associate chief physicians and chief physicians was 30.9% (134/433), 33.9% (234/691), 32.4% (213/657) and 34.9% (152/435), respectively, however there were no statistically significant differences among physicians of different level (χ²=6.60, P> 0.05). 95.6% (2 119/2 216) of gastroenterologists believed that probiotics could effectively improve bowel function, and 94.0% (2 082/2 216) of gastroenterologists considered that enteral nutrition support could improve patients’ prognosis. Conclusions The knowledge and dynamic progress of the digestive system injury caused of COVID-19 are still insufficiently grasped by gastroenterologists in China. So it is necessary to carry out systematic and pertinent training for them.

Objective:To investigate the awareness of digestive system injury caused by coronavirus disease 2019 (COVID-19) in gastroenterologists.Methods:From February 21 to 23 in 2020, the electronic questionnaire was used to learn about the condition of the basic knowledge of COVID-19 and awareness of digestive system injury caused by COVID-19 among the gastroenterologists across the country. Chi-square test was used for statistical analysis.Results:A total of 2 216 gastroenterologists from 31 provinces, autonomous regions and municipalities nationwide completed the survey. 99.7% (2 209/2 216) of gastroenterologists stated that they had read the COVID-19 diagnosis and treatment guidelines. The percentages of physicians who knew clearly about the diagnostic criteria of suspected and confirmed cases of COVID-19 was 34.9% (774/2 216) and 39.4% (874/2 216), respectively. The percentages of physician who gave the right answers of COVID-19 detectable methods and pulmonary imaging was 68.4% (1 516/2 216) and 71.6% (1 586/2 216), respectively. The percentages of correct answers of digestive system injury caused by COVID-19 were physicians and chief physicians was 30.9% (134/433) in residents, 33.9% (234/691) attending physicians, 32.4% (213/657) associated chief physicians and 34.9% (152/435) chief physicians, respectively, however there were no statistically significant differences among physicians with different professional titles ( χ2=6.60, P> 0.05). 95.6% (2 119/2 216) of gastroenterologists believed that probiotics could effectively improve bowel function, and 94.0% (2 082/2 216) of gastroenterologists considered that enteral nutrition support could improve patients’ prognosis. Conclusions:The knowledge and dynamic progress of the digestive system injury caused by COVID-19 are still insufficiently grasped by gastroenterologists in China. So it is necessary to carry out systematic and pertinent training programmes for them.