Case series of unilateral double-channel endoscope-assisted bone graft fusion and internal fixation in the treatment of recurrent lumbar disc herniation / 西安交通大学学报(医学版)

【Objective】 To explore the clinical effect of unilateral double-channel endoscope-assisted bone graft fusion and internal fixation (ULIF) in the treatment of recurrent lumbar disc herniation. 【Methods】 The clinical data of 22 patients with recurrent lumbar disc herniation treated by ULIF in our hospital from August 2020 to October 2020 were analyzed retrospectively. The study indicators included intraoperative blood loss, operation time, bed rest time, and hospital stay. The follow-up data included visual analogue score (VAS) of low back pain, Japanese Orthopaedic Association score (JOA), OSwestry disability index (ODI) score, as well as 36 concise health status survey (SF-36) scores before operation, and 1 week and 6 months after operation. 【Results】 The average operation time was (179.15±42.06) minutes, the average intraoperative blood loss was (132.67±41.92) mL, the average bed rest time was (1.51±0.42) days, and the average hospital stay was (4.82±1.13) days. The VAS score of low back pain at 1 week after operation was lower than that before operation (all P<0.000 1), and further decreased during the follow-up. The ODI score, JOA score and SF-36 score of postoperative follow-up were significantly different from those before operation (P<0.05). The satisfaction rate was 86.4% at 1 week after operation and 95.4% at 6 months after operation. The proportion of significant clinical efficacy at 1 week after operation and postoperative 6 months was 18.2% and 63.6%, respectively. 【Conclusion】 ULIF has the advantages of short-term recovery, less intraoperative blood loss, short bed rest and hospital stay, and good medium-term clinical effect. It is a safe and reliable minimally invasive technique for spinal surgeons in the treatment of recurrent lumbar disc herniation.

Foundation of acute symptomatic osteoporotic thoracolumbar fracture classification system and its validity examination and clinical application evaluation / 中华创伤杂志

Objective:To establish the acute symptomatic osteoporotic thoracolumbar fracture (ASOTLF) classification system, and to examine the reliability and evaluate the effect of clinical application.Methods:A retrospective case series study was conducted to analyze the clinical data of 1 293 patients with osteoporotic thoracolumbar fracture(OTLF) admitted to Honghui Hospital from January 2016 to December 2018. There were 514 males and 779 females, aged 57-90 years [(71.4±6.3)years]. The T value of bone mass density was -5.0--2.5 SD [(-3.1±-0.4)SD]. According to the clinical symptoms a and fracture morphology, OTLF was divided into 4 types, namely type I(I occult fracture), type II(compressed fracture), type III (burst fracture) and type IV(unstable fracture). The type II was subdivided into three subtypes (type IIA, IIB, IIC), and the Type III into two subtypes (type IIIA, IIIB). of all patients, 75 patients (5.8%) were with type I, 500 (38.7%) with type II A, 134 (10.4%) with type IIB, 97 (7.5%) with type IIC, 442 (34.2%) with type IIIA, 27(2.1%) with type IIIB and 18 (1.4%) with type IV. After testing the validity of the classification, different treatment methods were utilized according to the classification, including percutaneous vertebroplasty (PVP) for Type I, PVP after postural reduction for Type II, percutaneous kyphoplasty (PKP) for Type IIIA, posterior reduction and decompression, bone graft fusion and bone cement-augmented screw fixation for Type IIIB, and posterior reduction, bone graft fusion and bone cement-augmented screw fixation for Type IV. The visual analog score (VAS), Oswestry disability index (ODI), Frankel grade of spinal cord injury, local Cobb Angle, and vertebral body angle (vertebral body angle) were recorded in all patients and in each type of patients before surgery, at 1 month after surgery and at the last follow-up. The neurological function recovery and complications were also recorded.Results:The patients were followed up for 24-43 months [(29.9±5.1)months]. A total of 3 000 assessments in two rounds were conducted by three observers. The overall κ value of inter-observer credibility was 0.83, and the overall κ value of intra-observer credibility was 0.88. The VAS and ODI of all patients were (5.8±0.7)points and 72.5±6.6 before surgery, (1.8±0.6)points and 25.0±6.3 at 1 month after surgery, and (1.5±0.6)points and 19.5±6.2 at the last follow-up, respectively (all P<0.05). The Cobb angle and vertebral body angle of all patients were (13.0±9.1)° and (8.0±4.6)° before surgery, (7.9±5.2)° and (4.6±2.9)° at 1 month after surgery, and (9.1±6.0)° and (5.8±3.0)° at the last follow-up, respectively (all P<0.05). At the last follow-up, VAS, ODI, Cobb Angle and VBA of each type of patients were significantly improved compared with those before surgery (all P<0.05). The spinal cord compression symptoms were found 1 patient with type IV and 5 patients with type IIIB preoperatively. At the last follow-up, neurological function improved from grade C to grade E in 1 patient and from grade D to grade E in 5 patients ( P<0.05). The lower limb radiation pain or numbness in 3 patients with type IV and 22 patients with type III preoperatively were fully recovered after surgical treatment at the last follow-up except for three patients. Conclusions:The ASOTLF classification is established and has high consistency and reliability. The classification-oriented treatment strategy has achieved a relatively satisfactory effect, indicating that the classification has a certain guiding significance for treatment of OTLF.

Paraumbilical flap pedicled with deep inferior epigastric vessel for the repiration of soft tissue defects in pelvic area: 8 cases report / 中华显微外科杂志

Objective:To explore surgical techniques and summarize surgical experience of the paraumbilical flap pedicled with deep inferior epigastric vessels for the repiration of soft tissue defects in pelvic area.Methods:Between August, 2006 and August, 2018, 8 patients with soft tissue defects and bone exposure were treated with paraumbilical flap pedicled with deep inferior epigastric vessels. There were 6 males and 2 females with the average age of 35.3 (range, 12-47) years. The defects were caused by car accident in 5 cases, by high falling injury in 1 case, by soft tissue necrosis after malignant schwannoma resection in 1 case, and by soft tissue necrosis after pelvic operation of open reduction internal fixation in 1 case. The defects located at iliac spine in 5 cases, at tuber ischii in 1 case, and at buttock and perineal region in 1 case. The size of the wounds ranged from 11.0 cm×6.0 cm to 22.0 cm×8.0 cm. The size of the flaps ranged from 13.0 cm×7.0 cm to 29.0 cm×12.0 cm. The followed-up was made by outpatinet service, telephone or WeChat.Results:All flaps survived, and the wound infection was controlled. The followed-up time ranged from 12 to 46 (mean 26) months. All flaps survived uneventfully, and the texture and elasticity of the flaps were good. There were no recurrence of infection, and no ventral hernias occurred in donor sites.Conclusion:The transfer of paraumbilical flap pedicled with deep inferior epigastric vessels is a reliable method to repair large soft tissue defects in iliac spine, perineal region, buttock and tuber ischii.

Causes of residual back pain at early stage after percutaneous vertebroplasty / 中华骨科杂志

Objective:To explore the risk factors of residual back pain (RBP) in patients undergone PVP within 1 month and further analyze the correlation.Methods:Between March 2013 and January 2015, 1 316 patients with OVCF were treated by PVP. RBP after PVP was defined as a visual analogue scale (VAS) score of > 4 both 1 week and 1 month post-operatively. According to the pain relief, the patients were divided into two groups, the satisfied group and the unsatisfied group. All patients were scheduled for follow-up at1 week, 1 month, 3 months, and 1 year post-operatively, during which radiography and magnetic resonance imaging (T1-weighted, T2-weighted, and short time inversion recovery (STIR) sequences) were recommended to detect the existence of secondary OVCF. VAS scores and Oswestry disability index (ODI) were recorded. Demographic data, surgical information, anesthesia method, number of OVCF, injection amount of cement of single vertebral bone, imaging data and other comorbidity informations of patients in the two groups were analyzed by Logistic regression for the factors related to RBP after PVP.Results:Among 1 316 patients, 60 cases complained RBP, and the prevalence was 4.6%. VAS score and ODI of the two groups were significantly different at 1 week, 1 month and 3 months after surgery, suggesting there was a certain degree of residual pain in the lower back of patients in the unsatisfied group, which was more severe than that in the satisfied group. However, the above differences disappeared in the follow-up of 12 months after surgery.Univariate analysesshowed that preoperative bone mineral density (BMD), number of fracture, cement distribution and volume injected per level and lumbodorsal fascia contusion were associated with RBP after PVP ( P< 0.01, retrospectively). Multivariate analysis revealed that the absolute value of pre-operative BMD(odds ratio ( OR)=3.577, P=0.029), combined withlumbodorsal fascia contusion ( OR=3.805, P=0.002), number of fracture ( OR=3.440, P<0.001), satisfactory cement distribution ( OR=3.009, P=0.013) and combined with depression ( OR=3.426, P=0.028) were positively correlated with RBP after PVP, and these were risk factors. The injection amount of cement of single vertebral bone ( OR=0.079, P<0.001) was negatively correlated with RBP after PVP, which was a protective factor. Conclusion:Pre-operative low BMD, lumbodorsal fascial injury, multiple segment OVCF, insufficient cement injected volume, unsatisfactory cement distribution and depression were risk factors associated with RBP after PVP in patients with OVCF.

Pedicle screw internal fixation versus subcutaneous anterior pelvic internal fixation in treatment of pelvic anterior ring fractures / 中华创伤骨科杂志

Objective To compare pedicle screw internal fixation (PSIF) and subcutaneous anterior pelvic internal fixation (APIF) in the treatment of pelvic anterior ring fractures.Methods A retrospective study was conducted of a consecutive series of 46 patients who had undergone surgery for anterior ring pelvic fractures at Department of Orthopaedic Surgery,The People's Hospital of Henan Province from January 2014 to September 2018.Of them,20 were treated by PSIF and 26 by APIF.In the PSIF group,there were 12 males and 8 females with an age of 47.8 ± 2.4 years,and 6 cases of B1,9 cases of type B2,4 cases of type B3 and one case of type C1 by the Tile's classification;in the APIF group,there were 16 males and 10 females with an age of 49.6 ± 1.2 years,and 9 cases of B1,8 cases of type B2,5 cases of type B3,2 cases of type C1 and 2 cases of type C2 by the Tile's classification.The 2 groups were compared in terms of surgical or postoperative complications (including iatrogenic nerve injury,infection,implant failure and fracture nonunion),fracture reduction and therapeutic efficacy at the final follow-up.Results There were no significant differences between the 2 groups of patients in their preoperative general data,indicating they were compatible(P ＞ 0.05).The 46 patients were followed up for 9 to 18 months (mean,13.5 months).In the PSIF and APIF groups,the incidences of injury to the lateral femoral cutaneous nerve were 5.0％ (1/20) and 7.7％ (2/26),those of infection 5.0％ (1/20) and 3.8％ (1/26),and those of skin discomfort 5.0％ (1/20) and 7.7％ (2/26),respectively.According to the Matta criteria,the fracture reduction at the last follow-up was evaluated as excellent in 7,as good in 11 and as fair in 2 in the PSIF group,giving an excellent and good rate of 90.0％,and as excellent in 9,as good in 13 and as fair in 4 in the APIF group,giving an excellent and good rate of 84.6％.According to the Majeed criteria,the pelvic function at the final follow-up was evaluated as excellent in 10,as good in 7,as fair in 2 and as poor in one in the PSIF group,giving an excellent and good rate of 85.0％,and as excellent in 13,as good in 10,and as fair in 3 in the APIF group,giving an excellent and good rate of 88.5％.There were no significant differences between the 2 groups in all the comparisons above (P ＞ 0.05).The incidence of femoral nerve parasthesia was 0(0/20) for the PSIF group,significantly lower than that for the APIF groups (3.8％,1/26) (P ＜ 0.05).Conclusion As both PSIF and APIF lead to similar clinical efficacy in the treatment of pelvic anterior ring fracture,either of them can be selected as an appropriate surgical procedure depending on the patient's situation and surgeon's experience.

Pedicle screw internal fixation versus subcutaneous anterior pelvic internal fixation in treatment of pelvic anterior ring fractures / 中华创伤骨科杂志

Objective@#To compare pedicle screw internal fixation (PSIF) and subcutaneous anterior pelvic internal fixation (APIF) in the treatment of pelvic anterior ring fractures.@*Methods@#A retrospective study was conducted of a consecutive series of 46 patients who had undergone surgery for anterior ring pelvic fractures at Department of Orthopaedic Surgery, The People’s Hospital of Henan Province from January 2014 to September 2018. Of them, 20 were treated by PSIF and 26 by APIF. In the PSIF group, there were 12 males and 8 females with an age of 47.8±2.4 years, and 6 cases of B1, 9 cases of type B2, 4 cases of type B3 and one case of type C1 by the Tile’s classification; in the APIF group, there were 16 males and 10 females with an age of 49.6±1.2 years, and 9 cases of B1, 8 cases of type B2, 5 cases of type B3, 2 cases of type C1 and 2 cases of type C2 by the Tile’s classification. The 2 groups were compared in terms of surgical or postoperative complications (including iatrogenic nerve injury, infection, implant failure and fracture nonunion), fracture reduction and therapeutic efficacy at the final follow-up.@*Results@#There were no significant differences between the 2 groups of patients in their preoperative general data, indicating they were compatible(P>0.05). The 46 patients were followed up for 9 to 18 months (mean, 13.5 months). In the PSIF and APIF groups, the incidences of injury to the lateral femoral cutaneous nerve were 5.0%(1/20) and 7.7%(2/26), those of infection 5.0%(1/20) and 3.8%(1/26), and those of skin discomfort 5.0% (1/20) and 7.7%(2/26), respectively. According to the Matta criteria, the fracture reduction at the last follow-up was evaluated as excellent in 7, as good in 11 and as fair in 2 in the PSIF group, giving an excellent and good rate of 90.0%, and as excellent in 9, as good in 13 and as fair in 4 in the APIF group, giving an excellent and good rate of 84.6%. According to the Majeed criteria, the pelvic function at the final follow-up was evaluated as excellent in 10, as good in 7, as fair in 2 and as poor in one in the PSIF group, giving an excellent and good rate of 85.0%, and as excellent in 13, as good in 10, and as fair in 3 in the APIF group, giving an excellent and good rate of 88.5%. There were no significant differences between the 2 groups in all the comparisons above (P>0.05). The incidence of femoral nerve parasthesia was 0(0/20) for the PSIF group, significantly lower than that for the APIF groups (3.8%, 1/26) (P<0.05).@*Conclusion@#As both PSIF and APIF lead to similar clinical efficacy in the treatment of pelvic anterior ring fracture, either of them can be selected as an appropriate surgical procedure depending on the patient’s situation and surgeon’s experience.

Posterior lumbar interbody fusion and internal fixation for complete thoracolumbar fracture and dislocation / 中华骨科杂志

Objective To investigate the clinical features,safety and clinical efficacy of the posterior decompression and interbody fusion with internal fixation for complete thoracolumbar fracture and dislocation.Methods The clinical data of 23 patients with complete thoracolumbar fracture and dislocation treated by posterior decompression and interbody fusion with pedicle screw fixation from August 2011 to October 2014 were retrospectively analyzed.There were 18 males and 15 females,aging from 20 to 50 years old with an average age of 38.2±0.3 years.There were 8 cases of T10,11 vertebral dislocation,8 of T11,12 vertebral dislocation,3 of T12L1 vertebral dislocation,and 4 of L1.2 vertebral dislocation.All the patients had different degrees of multiple rib fractures and pneumothorax complications.Preoperative spinal cord nerve function was evaluated according to the American Spinal Injury Association of spinal cord function (ASIA).There were 10 cases of ASIA grade A and 13 cases of grade B.Operation time,intraoperative blood loss,clinical outcome,imaging X-ray and CT examination,segmental kyphosis angle and bone graft fusion were recorded.Results All the patients were followed up for 13 to 26 months,average 20.2±4.3 months.The operation time ranged from 150 to 260 min with the average time of 180.3± 14.8 min;intraoperative blood loss was 800-1 500 ml with the average of 950.2±98.1 ml.Preoperative sagittal Cobb angle was-13.5° ±6.3° (range,-20.1° to 2.3°);postoperative sagittal Cobb angle was 1.43°±6.4° (range,-7.6° to 3.5°);at the latest follow-up,sagittal Cobb angle was 1.6°±6.3° (range,-8.1° to 10.3°);the dislocation reduced from preoperative 100％ to postoperative 0-15％ (10％±6％).After operation,the ASIA grade of 2 cases improved from A to B,and 5 cases improved from B to C.All of the patients had bone fusion after operation,no false joint or nonunion occurred,no loosening or breakage of internal fixation occurred.Conclusion There are high risks and difficulty of surgery for those who with thoracolumbar fracture dislocation and severe injuries of spine and spinal cord combined with multiple injuries.Proper treatment of preoperative complications is the premise of good curative effect;reliable fusion and long segment internal fixation is the key of operation.Single posterior decompression and reduction with interbody fusion and internal fixation is less invasive and could achieve satisfactory clinical efficacy.

Is vertebral fixation needed during minimally invasive percutaneous self-dilating pedicle in repair of thoracolumbar vertebral fractures / 中国组织工程研究

BACKGROUND: Most scholars believed that injured vertebral body needs to be fixed in the open surgery of thoracolumbar vertebral fractures; however, it is unclear whether injured vertebra needs to be fixed in the minimaly invasive surgery. OBJECTIVE: To investigate the clinical outcomes of minimaly invasive percutaneous self-dilating pedicle in repair of injured vertebral fixation in thoracolumbar vertebral fractures. METHODS: Totaly 36 patients with thoracolumbar vertebral fractures without nervous system injury who received treatment in Honghui Hospital, Xi’an Jiaotong University Health Science Center from February 2013to February 2014 were enroled and divided into injured vertebral fixation and cross-injured vertebral fixation groups (n=18/group). Patients in these two groups were al subjected to minimaly invasive percutaneous self-dilating pedicle treatment. The injured vertebral body, upper, and lower vertebrae of injured vertebral body were fixed in injured vertebral fixation group, and the upper and lower vertebrae of injured vertebral body was fixed in cross-injured vertebral fixation group. RESULTS AND CONCLUSION: Compared with the injured vertebral fixation group, the cross-injured vertebral fixation group had smaler incisions, less intraoperative blood loss, less operation tine and intraoperative X-ray fluoroscopy time (P 0.05). These results demonstrate that anterior vertebral height cross-injured vertebral fixation has the similar clinical effect with injured vertebral fixation, but cross-injured vertebral fixation had more advantage in the operation. Therefore, there is little significance of conducting injured vertebral fixation in the surgery of minimaly invasive percutaneous self-dilating pedicle in repair of thoracolumbar vertebral fractures.

Effective dose and safety of adenosine triphosphate in inducing dual atrioventricular nodal pathways phenomenon / 中国医师进修杂志

Objective To investigate the effective dose and safety of adenosine triphosphate(ATP) in inducing dual atrioventricular nodal pathways(DAVNP)phenomenon.Methods The ATP(the initial dose was 0.15 mg/kg,incremented 0.10 mg/kg each time)was injected to 40 patients who had slow-fast atrioventricular nodal reentrant tachycardia(AVNRT)through a femoral vein until signs of DAVNP,second-or third-degrec atrioventricular block(AVB)appared.The surface and intracardiac electrocardiogram was recorded consecutively.Results Forty patients of the slow-fast AVNRT had AVB after injecting ATP (16.1±5.8)mg(9-22 mg),29 patients(72.5%,29/40)occurred DAVNP phenomenon,of which 11 (37.9%,11/29)revealed DAVNP phenomenon after injecting ATP 0.15 mg/kg.Seventeen patients had side-effects of dyspnea,dizziness,cough,cardiopalmus and so on,but these side-effects were generally minor,short duration.Forty patients had transient cardiac arrhythmia.Conclusions The incremental low-dose method in inducing DAVNP has higher positive rate.The side-effects of ATP are mostly light and short duration,and can not cause serious consequence.

The third Chinese visible human dataset produced / 第三军医大学学报

Objective To establish more detailed dataset of Chinese visible human male. Methods After undergoing macroscopical, CT and MRI examinations to exclude organic lesion, a young aged, middle sized male cadaver was selected as the subject. First, morphological measurement and vascular perfusion were performed. Second, after embedding with 5% gelatin, the cadaver was put in ice house and frozen to -30 ℃ for 1 week. Third, TK 6350 numerical control milling machine (milling accuracy of 0.001 mm) was used to shave off slices of the body layer by layer from head to foot at -25 ℃ in low temperature laboratory. Fourth, the successive cross sections were photographed with high resolution digital camera and scanned into an animation computer. Thus, data acquisition from cadaver model was completed to obtain structural dataset of the human body. Results The selected sample was a 21 year old, 1 820 mm in height, 66 kg in weight male died due to non organic disease. CT with 1.0 mm slice thickness for the head and neck and 2.0 mm for the rest of the body was performed. MRI with 1.5 mm slice thickness for the head and neck and 3.0 mm for the rest of the body was also performed. A total of 18 398 serial cross sections with the thickness of 0.1 mm of each section were obtained. The digital photographs were sampled at a resolution of 10 989 056 (4 064?2 704) pixels. The data file of each section occupies 62.9 MB. The complete data files occupy 1 157.23 GB. The research results are issued simultaneously on the Internet (http://www.chinese visiblehuman.Conclusion ① Review of the related literatures reveals that the thinnest thickness of the reported cross section of the visible human dataset is 0.2 mm(the thickness of the sections of the skull base of the first case of Chinese visible human reported by our research group is 0.1 mm.), and the slices consist of several thousands of serial cross sections with several millions of pixels. The data files occupy several tens of GB or more than 100 GB. However, the thickness of the cross sections of the whole body of the dataset achieved in our research is 0.1 mm. The total slices consist of 18 398 serial cross sections with the photographic resolution of 11 million pixels and the total data file reaches 1 157.23 GB. The three indexes mentioned above are elevated by 1 log unit. ② We have solved the key technical problems in data acquisition of visible human such as super thin serial cross sectioning, enormous quantity of data storing and display of tiny blood vessels.

Visualization of the first Chinese visible human male and female / 第三军医大学学报

Objective To achieve computer visualization of the first Chinese visible male and female Methods After acquisition of the dataset of the first Chinese visible male and female (2 518 cross sections were obtained from the visible male, the complete data files take up 90 468 GBs; while 3 640 cross sections from the female, the complete data files take up 131 04 GBs ), we processed 2 D images in an SGI Workstation and on P4 computer respectively Then, image registration was performed through reserved scaling point Reconstruction was achieved by two approaches: volume rendering reconstruction and surface rendering reconstruction Results We visualized the whole body and special parts of Chinese visible male and female on an SGI Workstation and a personal computer respectively Furthermore, by optimizing 3 D reconstruction and data processing technique, interactive 3 D visualization of the dataset was achieved Conclusions ①The dataset of the first Chinese visible male and female proves to be eligible for 3 D visualization research ②The platform setup of interactive 3 D visualization of Chinese visible male and female dataset provides foundation for digital human anatomy and virtual surgery ③The models of human organs and parts built through data segmentation, classification, registration and drawing lay basis for rendering complex structures of the whole human body delicately

Dataset collection and visualization for first visible human female in China / 第三军医大学学报

Objective To build the dataset of Chinese visible human female. Methods After undergoing macroscopical, CT and MRI examinations to exclude organic lesions, a young female cadaver of medium height was selected as the subject. After morphological measurement and vascular perfusion, the cadaver was embedded with 5% gelatin and cryopreserved in a -30 ℃ icehouse for 1 week. A digital milling machine TK 6350 (milling accuracy of 0.001 mm) was used to shave off slices of the body layer by layer from head to foot in a laboratory at -25 ℃. The successive cross sections were photographed with a high definition digital camera, and the pictures were put into a computer to establish a dataset of human body. By utilizing the image dataset derived from the successive cross sections, 3D reconstruction and stereodisplay of human structure were finished with a SGI Workstation which was equipped with an independently self developed software package for 3D reconstruction. Results The selected specimen, a 22 year old female native of Chongqing, was 1 620 mm in height, 54 kg in weight and died of non organic disease. CT scans were made in every 1.0 mm for head and neck and every 2.0 mm for rest parts, and the thickness for MRI scans was 1.5 mm for head and 3.0 mm for rest parts. For serial cross sections, the thickness was 0.25 mm for head and 0.5 mm for rest parts. Thus, a total of 3640 slices were obtained, and the photo for every slice was saved as a 36 MB file in a resolution of 6 291 456 pixels (3 072?2 048). Finally, the complete data files reached to 131.04 GB. Conclusion ① This is the first formally reported case of Chinese visible human female, suggesting that China becomes the second country owning visible human female dataset of her population. We set up a website for the purpose of exchanging ideas and information on this subject. So, the results are issued simultaneously on the Internet (http://www.chinesevisiblehuman.com).② According to US Visible Human Project(VHP), the data of the 3 junctional parts of their female cadaver were absent because the body was cut into 4 segments. Taking the age of 59 year old into account, the visible human female's body was not exactly perfect. The sections of 0.33 mm in thickness were saved to pictures at a resolution of 2 490 368 pixels (2 048?1 216). While, the first Chinese visible human female reported here is a young female without organic disease or lesion. No sectional datum is lost for being acquired from successive sections of the whole body. The resolution of cross sectional image reaches to 6 291 456 pixels (3 072?2 048).

Thin sectional anatomy of the cardiac septum and surrounding structure / 第三军医大学学报

Objective To study the sectional anatomy of the cardiac septum to provide the reference for clinical imageology and surgery. Methods Sixteen normal adult hearts without organic lesions were verified macroscopically. After vascular perfusion, the specimens were embedded with gel, fixed with 5% formalin, and cryopreserved for a week, and then were sectioned with the Digital Sectioner. Results A total of 1 608 slices (thickness: 0.2 mm) of the heart were obtained. Cardiac septum and the surrounding structures were shown clearly. The demarcation of connective and muscular tissues was clear. The diameters of the cardiac apex, fossa ovalis, brawny intraventricular septum, left ventricle, right ventricle, left and right fibrous trigone were measured with Photoshop6.0. Conclusion The clear images can display tiny structures that could be measured, which could provide anatomical references clinical imageology and surgery.