OBJECTIVETo measure the changes of plantar pressure of the first tarsometatarsal joint fracture and dislocation by three different implants to provide experimental reference in selecting implants.

METHODSEight fresh foot specimens were made into the models of the first tarsometatarsal joint fracture and dislocation, which were fixed with 3.5 mm cortical screw, 1/4 tubular plate and compressive staple in turn. After the loading of 600 N, the changes of the plantar pressure in forefoot were measured by the method of the F-scan plantar pressure system.

RESULTSAfter first tarsometatarsal joint fracture and dislocation, the peak pressure under the first metatarsal head would decrease, while the pressure under the second metatarsal head would increased,whose differences were statistically significant (P<0.05). When the first tarsometatarsal joint was fixed with screw or plate respectively; the peak pressure under the two metatarsal heads would tend to be normal. However,the staple fixation showed the statistical significant difference compared with normal state, although the peak pressure under the first and second metatarsal heads were recovered in some extent(P<0.05).

CONCLUSIONAfter the first tarsometatarsal joint fracture-dislocation, the plantar pressure might be compensated partly by the adjacent metatarsal heads according to the regulation of the load transfer mechanism. While the first tarsometatarsal joint fracture-dislocation was fixated by screw or plate, the plantar pressure of the forefoot would return to the normal state. However,if the joint was fixated by the staple, it would still be difficult to return the plantar pressure to be normal.

Foot Joints ; injuries ; surgery ; Forefoot, Human ; physiology ; Fracture Fixation, Internal ; methods ; Fractures, Bone ; surgery ; Humans ; Joint Dislocations ; surgery ; Pressure

Microbubble contrast agents for ultrasound (US) have been developed and clinically applied in recent years. Contrast-enhanced ultrasound (CEUS) has been widely used in the imaging of liver and other organs such as kidney, pancreases, spleen, prostate, ovarian, uterus as well as abdominal trauma, showing promising values in the diagnosis and differential diagnosis of various diseases. This article reviews the recent development and future protential clinical applications of CEUS.
Contrast Media ; administration & dosage ; Diagnosis, Differential ; Drug Delivery Systems ; Humans ; Microbubbles ; Ultrasonography ; methods

Abstract?AIM: To determine the relation between each of the optical coherence tomography ( OCT) patterns, etiologies and visual acuity in patients with cystoid macular edema ( CME) .?METHODS:Fifty-seven eyes with CME from 52 patients were included in our study. The data of this cross sectional study was collected rfom p atient s wtih CME assessed by OCT, who also underwent fun dus photography and visual acuity test the same day. The best corrected visual acuity ( BCVA ) was assessed by using E chart a nd converted in logarithm of the minimum angle of resolution( logMAR ) . Thevisual acuity varied from 2.3 logMAR to 0 logMAR w ith a mean of 1.11±0.57. The etiology was determined from medical history and the fundus ph otograph of the patient. Four O CT grades established according to ratio between the vertical size of largest cyst and the maximum macular thickness (<30 %,≥30% <60%,≥60% <90%and≥90%) were considered. The correlation was established by calculating the Pearson's correlatio n coefficient “r” and the statistical significance was considered when P value was inferior to 0.05.?RESULTS: OCT grade I V was the most associated with very severe visual loss with the greatest mean VA of 1.96± 0.23 logMAR and the correlation between OCT grades and visual acuity was strongly statistically significant ( r =0.729, P <0.001 ). The central retinal vein occlusion ( CRVO) was the most underlying disease associated with worsev ision, with the gre atest mean VA of 2 logMAR and the correlation was statistically significant ( r=0.375, P=0.004).Another associated OCT pattern, the disruption of bot h inner segment/outer segment ( IS/OS) and external limiting membrane ( ELM) , was inversely associated with severe visual loss ( high mean VA=1.11 ±0.57 logMAR, with statistically significant correlation, r=-0.346, P=0.008 ) . The presence of both vitreoretinal traction components and outer retinal layers disruption were significantly associated with OCT grade IV ( r=0.390, P=0.003) and CRVO (r=0.362, P=0.006).?CONCLUSION:In this study, the OCT fourth grade and CRVO seem to be more significantly associated with the worse vision in patients with CME.

Anthrax ; Humans ; Occupational Diseases ; microbiology

Brucellosis ; Humans ; Occupational Diseases ; microbiology

During the teaching process,the humanity thought was infiltrated into the professional knowledge so as to cultivate the students'humanity thinking and healthy personality.

Objective To observe the ultrasonographic features of local chest wall tumor recurrence after mastectomy for breast cancer and its clinical and histopathological characteristics. Methods The ultrasonographic features, clinical and histopathological characteristics of 27 patients with local chest wall tumor recurrence after mastectomy confirmed histopathologically were retrospectively reviewed. Results The disease-free intervals of twenty-seven patients ranged from 3 to 129 months [mean (31.9±31.4) months]. Most of the recurrence(18/27, 66.7%) occurred within 3 years after mastectomy. The clinical manifestations were:7 cases (7/27, 25.9%) with regional skin redness and swelling, red rash or ulceration on chest wall associated with or without palpable mass, 20 cases(20/27, 74.1%) with chest wall palpable masses without obvious skin change. On ultrasonography, 2 cases showed diffuse inifltrative type with ill-deifned inhomogeneous hypoechoic lesion and skin thickening. And twenty-ifve cases(43 lesions) showed mass type with a lesion size range of 5.4-114.7 mm [mean (24.4±21.6) mm]. Among them, 32 lesions were located near to the operation incision scar, 36 involved muscle layer, 38 were hypoechoic, 31 had irregular shape, 24 had indistinct margin, and 31 had blood lfow signal. In addition, calciifcation, halo, and taller-than-wide shape were absent in all 43 lesions. Conclusions The tumor recurrence often occurred within 3 years after mastectomy in high-risk patients. Ultrasonographic feature of chest wall recurrent lesion is of great value in the diagnosis.

Objective To comprehand and grasp epidemical distribution characteristics of colorectal cancer cases. WT5”HZMethods Between 1975 and 1999, 1 145 cases of colorectal carcinoma who had undergone a surgery in Nanfang Hospital were retrospectively studied and a survey of clinical epidemical distribution characteristics was made. ResultsWT5”BZ ①Though more elder cases were found in recent years, young patients still made up a high proportion(19%) of the cases.②The occurrence of mucoid and signet-ring cell carcinoma in young cases was higher than that in the elders( P 0 05). KG2Conclusion The study of clinical epidemiology provided dependabal bases for prevention and therapy of colorectal carcinoma.

Objective To study the changes of umbilical blood lactate,pH, blood sugar(BS),bilirubin, electrolyte, osmotic pressure (OP) in the newboms with fetal distress.Methods Thirty-five newborns with fetal distress (distress group) and 40 healthy new-borns (control group) were studied. Distress group were divided into distress group Ⅰ and distress group Ⅱ respectively, based on without or with neonatal asphyxia. Concentration of umbilical blood lactate was determined with enzyme method, pH, BS,serum total bilirubin (BIL), serum electrolyte (Na+ ,K+ ,Ca2+ ) and OP were analyzed respectively. Results 1. The difference of incidence of newborn asphyxia between distress groups (29.03%) and control group (2.50%) was statistically significant. 2. Compared with the controls and distress group Ⅰ, the umbilical blood lactate concentration significantly increased in distress group Ⅱ (P 0.05).The incidence of hyperglycemia was significantly elevated in distress groups than that in the control group. 4. Lactate concentration in distress I and distress fl group showed negative correlation with pH. Conclusion The concentration of umbilical blood lactate can provide the proof for diagnosis and prognosis of fetal distress.

Objective To investigate the relationship between trace elements and rachitis in children.Methods Three hundred and twelve patients with rachitis and 297 healthy children were selected for this study.Blood zinc(Zn),iron(Fe),plasma copper(Cu),calcium(Ca),magnesium(Mg),lead(Pb) and cadmium(Cd) were assayed by atomic absorption spectrophotometer.Results The levels of Zn,Fe,Cu of rachitis in blood were significantly lower than those of healthy children,while the levels of Mg,Pb were higher.There were significant differences between 2 groups(P