| Common carotid artery is the most important truncus arteriosis of head and neck, the dextral one originate from brachiocephalic trunk, the near one directness originate from artery bow. Both sides common carotid artery equal transit rear of articulatio sternoclavicularis,go up from the tracheae, esophagus and larynx to upper limb of the thyroid cartilage, we called internal carotid artery and external carotid artery.There are vena jugularis interna and vagus out of the common carotid artery which are in the carotid sheath. Arteria meningea media originate from collum mandibulae deep surface by maxillary artery to middle cranial fossa, which are falled into front, aback two denier. The underside of the ramus anterior in favor of,along upper by pterion, branching to parietal forehead,ramus posterior follow squama temporalis underside bent backwards,distribution to parietal tail namely adjacent squama occipitalis region. Both at encephalic,arteria meningea media clung skull underside TRODDEN,given off branch provide skull and cerebral dura mater. The fracture,easy injury and this artery(especially ramus anterior),form putamen besides haematoma of the external force by region hit station engender.Research the common carotid artery and arteria meningea media stretching force learn performance and viscoelasticity behavior stress relaxation and creep viscoelasticity behavior on white rat,Supply the biomechanics rationale for clinical.The method is procing the stretch, stress relaxation and creep experiment with white rat common carotid artery and arteria meningea media. With the result that could arrive at common carotid artery and arteria meningea media stretch ultimate load, maximum stress, maximum strain, elastic modulus, extend grade,return arrive at know clearly stress relaxation, creep experimental data and curve , withal piaster linear regression analysis route to get experimental data, done to, dope out white rat common carotid artery and arteria meningea media normalization stress relaxation function, creep function data and curve and two-sets sample experimental data 'regression coefficient C, D and A, B value.The object develop is from the quantitative change to the qualitative change , the majority cerebral infarction patient are sick of have got atherosclerosis on prophase, for the moment atherosclerotic pathogeny yet without last word,but regulating and tonifying the blood liquid stream change,relate.The author reckon prevent and early diagnosis cerebral arteriosclerosis and cerebral infarction as vital,from biomechanics 'viewpoint prevent cerebral arteriosclerosis and cerebral infarction namely ask actuation vein kept favorable elasticity and rheological property,arterial elasticity and rheological property best with escapable occur atherosclerosis and cerebral infarction for.The viewpoint versus safeguard and early diagnosis atherosclerosis and cerebral infarction 'extend proceed know clearly analyses into against of the text from biomechanics, Supply the biomechanics rationale for clinical by common carotid artery and arteria meningea media 'stretching force learn property AND viscoelastic rheology characteristic indices.Experimental method and courseThere are 20 wisfer white rat of stretch experimental animal, supply for the department of by Jilin university Bethune medicine animal experiment hub. Both equal for male sex,avoirdupois 200 gram±forty gram,animal feeding two cycle aback put to death,take out common carotid artery and arteria meningea media each twenty piece proceed stretch experiment,sample length schedule an appointment with 10mm,bore for 0.8-0.9mm,outside diameter 1.2-1.3mm. Retake 20 pieces sample proceed viscoelasticity experiment,withal reading microscope measure hansel size,hansel size length for 9.8-10.2mm,bore for 0.78-0.88mm,outside diameter for 1.22-1.28mm,each block each twenty piece sample,thereinto adrenic acid piece design to stress relaxation experiment,adrenic acid piece design to CREPT experiment. Experimental apparatus adopt Japan island the thin and clear body fluid electron universal testing machine,load through the medium of load transducer hand,strain past man machine strain transmission by location,experiment end aback figure spontaneous output experimental result up off round. The figure within up of the hansel original size import to controlling machine ware. The elasticity mostly came from entropic transfer,thus nonentity only mode,in this way organize met vary with loading, unloading cycle index,ask time after time repeat talent run up to stable state for of the blood vessel parenchyma. The computor automatism ultimate load, maximum stress, maximum strain and elastic modulus after experiment destroy.We express two-sets sample stretch experimental data with typical value±standard deviation stand for and adopt P put statistical treatment to the proof.We express two-sets sample stretch experimental data with typical value±standard deviation stand for and adopt P put statistical treatment to the proof, and procee statistics COMPare,experimental data withal piaster linear regression analysis,arrive at regression coefficient. 1 Two group sample stretch experimental studyStretch experimental result lay,white rat common carotid artery stretch ultimate load for 3.828±0.26n,maximum stress for 1.779±0.31mpa bare, maximum strain for 8.62±0.16%,elastic modulus for 165.9±18.6mpa. extend for 23.25±3.6% to.White rat arteria meningea media ultimate load for 3.732±0.38n, maximum stress for 1.814±0.42mpa, maximum strain for 9.37±0.22%, elastic modulus for 171.6±26.2mpa, extend for 25.72±2.9% to.2 Two group viscoelasticity experimental studyStress relaxation, creep experimental result proclaim,soever yes common carotid artery group just the same arteria meningea media group,initially 600s change compare,sith stress delayed drop,strain slow rise. common carotid artery 7200s stress relaxation measure for 0.368mpa,arteria meningea media 7200s stress relaxation quantity for 0.455mpa up. common carotid artery 7200s amount of creep for 2.04%,arteria meningea media 7200s amount of creep for 0.455%. arteria meningea media 7200s stress relaxation quantity with amount of creep equal prominence greater than common carotid artery group(P﹤0.05).Conclusion1. Common carotid artery stretch maximum stress and arteria meningea media stretch ultimate load, maximum stress, maximum strain difference inconspicuousness(P﹥0.05).2. Arteria meningea media elastic modulus and extend greater than common carotid artery,significant difference(P﹤0.05).3. Arteria meningea media 7200s stress relaxation measure greater than common carotid artery,significant difference(P﹤0.05) up. 4.Arteria meningea media 7200s amount of creep greater than common carotid artery,(P﹤0.05).5.Common carotid artery and arteria meningea media possess favorable stress relaxation, creep characteristic,for viscoelastic material.In a word,these experimental result supplied the biomechanics rationale for clinical,and possess definite meaning by safeguard and cure cerebral arteriosclerosis and cerebral infarction against. |
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