Lub plab aorta (los ntawm Greek aortê, txhais tau tias cov hlab ntsha loj) sib raug rau ib feem ntawm lub aorta, cov hlab ntsha loj tshaj plaws hauv lub cev.

Txoj hauj lwm. Nyob nruab nrab ntawm lub thoracic vertebra T12 thiab lub lumbar vertebra L4, lub plab aorta yog qhov kawg ntawm lub aorta. (1) Nws ua raws li qhov nqis aorta, qhov kawg ntawm lub thoracic aorta. Lub plab aorta xaus los ntawm kev faib ua ob sab ceg uas ua rau sab laug thiab sab xis cov hlab ntsha iliac, nrog rau ib ceg thib peb nruab nrab, cov hlab ntsha nruab nrab sacral.

Cov ceg ntoo nyob ib ncig. Lub plab aorta ua rau muaj ntau ceg, tshwj xeeb tshaj yog parietal thiab visceral (2):

• Lower phrenic hlab ntsha uas yog npaj rau underside ntawm lub diaphragm
• Celiac trunk uas faib ua peb ceg, cov hlab ntsha hauv siab, cov hlab ntsha splenic, thiab cov hlab ntsha sab laug. Cov ceg no yog npaj rau vascularize lub siab, plab, spleen, thiab ib feem ntawm lub txiav
• Superior mesenteric hlab ntsha uas yog siv rau cov ntshav muab rau cov hnyuv me thiab loj
• Adrenal hlab ntsha uas ua haujlwm rau cov qog adrenal
• Lub raum cov hlab ntsha uas yog npaj los muab lub raum
• Cov hlab ntsha ntawm zes qe menyuam thiab qe menyuam uas ua haujlwm rau zes qe menyuam nrog rau ib feem ntawm cov hlab ntsha hauv tsev menyuam, thiab cov noob qes.
• Inferior mesenteric hlab ntsha uas ua haujlwm ib feem ntawm txoj hnyuv loj
• Cov hlab ntsha lumbar uas yog npaj rau qhov posterior ntawm phab ntsa plab
• Medium sacral hlab ntsha uas muab cov coccyx thiab lub sacrum
• Cov hlab ntsha iliac uas yog npaj los muab cov khoom nruab nrog cev ntawm lub plab mog, sab qis ntawm phab ntsa plab, nrog rau cov ceg qis.

Irrigation. Lub plab aorta plays lub luag haujlwm tseem ceeb hauv vascularization ntawm lub cev ua tsaug rau nws cov ceg sib txawv uas muab cov phab ntsa hauv plab thiab cov kab mob visceral.

Phab ntsa elasticity. Lub aorta muaj phab ntsa ywj pheej uas tso cai rau nws hloov kho rau qhov sib txawv ntawm qhov sib txawv uas tshwm sim thaum lub sijhawm mob plawv thiab so.

Lub plab aortic aneurysm yog nws qhov dilation, tshwm sim thaum cov phab ntsa ntawm lub aorta tsis sib npaug. Cov aneurysms no feem ntau yog spindle-puab, piv txwv li cuam tshuam rau ib feem tseem ceeb ntawm lub aorta, tab sis kuj tuaj yeem ua rau sacciform, nyob hauv thaj tsam tsuas yog ib feem ntawm lub aorta (3). Qhov ua rau ntawm cov kab mob no tuaj yeem txuas nrog kev hloov pauv ntawm phab ntsa, rau atherosclerosis thiab qee zaum tuaj yeem kis tau los ntawm keeb kwm. Qee zaum, plab aortic aneurysm tuaj yeem nyuaj rau kev kuaj mob nrog qhov tsis muaj cov tsos mob tshwj xeeb. Qhov no yog tshwj xeeb tshaj yog cov ntaub ntawv nrog ib tug me me aneurysm, yam ntxwv ntawm ib txoj kab uas hla ntawm lub plab aorta tsawg tshaj li 4 cm. Txawm li cas los xij, qee qhov mob plab lossis sab nraub qaum tuaj yeem hnov. Raws li nws loj tuaj, lub plab aortic aneurysm tuaj yeem ua rau:

• Compression ntawm cov khoom nyob sib ze xws li ib feem ntawm cov hnyuv me, lub ureter, inferior vena cava, los yog tej hlab ntsha;
• Thrombosis, uas yog hais tias tsim ntawm ib tug clot, nyob rau theem ntawm aneurysm;
• Mob ntshav qab zib obliteration ntawm cov ceg qis sib xws rau qhov muaj qhov cuam tshuam tiv thaiv cov ntshav los ntawm kev ncig ib txwm;
• tus kab mob;
• ib qho ruptured aneurysm sib haum mus rau rupture ntawm phab ntsa ntawm lub aorta. Qhov kev pheej hmoo ntawm qhov kev puas tsuaj no yog qhov tseem ceeb thaum txoj kab uas hla ntawm lub plab aorta tshaj 5 cm.
• teeb meem tawg uas cuam tshuam nrog "ua ntej tawg" thiab ua rau mob;

Kev kho mob phais. Nyob ntawm theem ntawm qhov aneurysm thiab tus neeg mob tus mob, kev phais yuav ua rau ntawm lub plab aorta.

Kev saib xyuas kho mob. Nyob rau hauv cov ntaub ntawv ntawm me me aneurysms, tus neeg mob tau muab tso rau hauv kev saib xyuas kev kho mob tab sis tsis tas yuav tsum tau phais.

Kev kuaj lub cev. Ua ntej, kev kuaj mob yog ua los ntsuas qhov mob plab thiab / lossis mob lumbar.

Kev kuaj xyuas kev kuaj mob txhawm rau paub meej tias qhov kev kuaj mob, kev kuaj mob plab yuav ua tau. Nws tuaj yeem muab ntxiv los ntawm CT scan, MRI, angiography, lossis txawm tias aortography.

Txij li xyoo 2010, ntau qhov kev tshuaj ntsuam xyuas tau ua los tiv thaiv aneurysms ntawm lub plab aorta.