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Kev kho mob tshiab uas tsis tas phais rau tes thiab taw tshee hnyo? (MR-Guided Focused Ultrasound)

Kev kho mob tshiab uas tsis tas phais rau tes thiab taw tshee hnyo? (MR-Guided Focused Ultrasound)

Koj lossis ib tug neeg koj paub puas muaj mob tshee hnyo? Qee zaum qhov no yuav ua rau koj tsis xis nyob uas koj tsis tuav tau ib khob tshuaj yej lossis kos npe rau daim ntawv. Niaj hnub no, peb tab tom tham txog kev kho mob tshiab uas tuaj yeem ua tau yam tsis tas phais rau cov neeg uas muaj teeb meem tswj tus mob no txawm tias noj tshuaj. Qhov no hu ua MR-Guided Focused Ultrasound.

MR-Guided Focused Ultrasound (MRgFUS) yog dab tsi?

Hais yooj yim xwb, qhov no yog kev sib xyaw ua ke ntawm ob txoj kev. Xav txog nws zoo li txoj haujlwm ntawm ob pab neeg muaj peev xwm heev ua haujlwm ua ke.

  • Kev Siv Duab Xam Xaj Sib Nqus (MR): Qhov no yog qhov uas qhia txoj kev. Peb txhua tus paub tias kev luam theej duab MRI tuaj yeem thaij duab meej thiab ntxaws ntxaws ntawm cov kabmob hauv peb lub cev. Thaum lub sijhawm kho mob no, cov duab MRI no pab cov kws kho mob pom tseeb tias lawv xav tau kev kho mob qhov twg hauv lub hlwb, thiab tseem saib xyuas seb txhua yam puas mus zoo thaum lub sijhawm kho mob.
  • Kev Siv Ultrasound Uas Muaj Lub Suab Nrov: Nov yog tus neeg uas ua kev kho mob. Ultrasound yog lub suab nrov uas peb pob ntseg tsis hnov. Cov suab nrov no tuaj yeem hla dhau cov ntaub so ntswg xws li peb daim tawv nqaij, rog , thiab pob txha. Hauv kev kho mob no, ntau dua 1,000 lub teeb ultrasound raug sib koom ua ke thiab tsom mus rau lub hom phiaj me me hauv lub hlwb uas MRI pom. Tom qab ntawd, tsuas yog thaj chaw ntawd kub hnyiab, ua rau muaj qhov kub hnyiab me me (mob). Qhov no rhuav tshem cov ntaub so ntswg tsis zoo. Tab sis cov ntaub so ntswg noj qab haus huv nyob ib puag ncig tsis raug mob .

Kev kho mob no yuav txo qhov kev co li cas?

Muaj ib feem ntawm peb lub hlwb hu ua thalamus. Nws zoo li lub tsheb ciav hlau sib tshuam. Nws xa cov cim qhia txog peb lub cev txoj kev txav mus los thiab kev xav rov qab los. Hauv cov kab mob zoo li Essential Tremor thiab Parkinson's, kev ua haujlwm ntawm thalamus no dhau los ua qhov tsis zoo. Qhov ntawd yog qhov ua rau muaj kev co .

Hauv kev kho mob no, cov duab ultrasound tsim ib qho mob me me hauv lub hlwb lub thalamus, uas cuam tshuam lub voj voog ua haujlwm tsis zoo. Thaum qhov kev cuam tshuam ntawd tshwm sim, qhov kev co yuav luag ploj mus tam sim ntawd.

Cov xwm txheej tau pom zoo rau kev kho mob Cov ntaub ntawv tseem ceeb
Kev tshee hnyo tseem ceeb Rau cov mob uas tsis tuaj yeem tswj tau nrog tshuaj. Yuav tsum muaj hnub nyoog tshaj 22 xyoos. Tau pom zoo kom kho ob sab ntawm lub cev.
Kab mob Parkinson uas muaj kev tshee hnyo feem ntau Rau cov neeg mob Parkinson uas muaj tsos mob tseem ceeb yog tshee hnyo. Yuav tsum muaj hnub nyoog tshaj 30 xyoo.
Cov xwm txheej uas raug sim siab Cov thev naus laus zis no tseem nyob rau theem kev tshawb fawb los kho cov mob tshee hnyo, qaug dab peg, mob neuropathic, thiab mob qog hauv hlwb uas cuam tshuam nrog ntau yam sclerosis (MS).

Cia peb kawm txog seb kev kho mob ua haujlwm li cas.

Qhov no yuav zoo li ntshai me ntsis, tab sis nws yog ib qho txheej txheem uas tau npaj tseg thiab muaj kev nyab xeeb heev. Koj yuav sawv txhua lub sijhawm, yog li koj tuaj yeem tham nrog pab pawg kho mob.

1. Kev Npaj: Thaum sawv ntxov ntawm kev kho mob, koj lub taub hau yuav raug txiav. Qhov no yog vim tias cov duab ultrasound yuav tsum kov koj daim tawv nqaij. Koj lub plawv dhia thiab ntshav siab yuav raug saib xyuas tas li.

2. Lub Taub Hau: Tom ntej no, koj lub taub hau yuav raug khi rau hauv ib lub thav tshwj xeeb kom tiv thaiv nws kom tsis txhob txav mus los. Koj yuav tau txais tshuaj kom koj so kom txaus thaum lub sijhawm no, yog li tsis muaj dab tsi yuav tsum txhawj txog.

3. Lub tshuab cua txias: Ib daim nyias nyias silicone siv los ncig cov dej txias ntawm koj lub pob txha taub hau thiab lub cuab yeej ultrasound. Qhov no pab tiv thaiv koj lub taub hau kom tsis txhob kub dhau.

4. Hauv lub tshuab MRI: Koj yuav raug yuam kom pw saum txaj MRI. Koj lub taub hau yuav raug ntsia rau ntawm txaj kom koj tsis tuaj yeem txav koj lub taub hau. Tom qab ntawd, yuav muaj kev tshuaj xyuas ntau zaus rau lub hlwb kom paub tseeb tias qhov chaw kho mob yog qhov tseeb.

5. Pib kev kho mob: Ua ntej pib kev kho mob, koj qhov kev co yuav raug soj ntsuam thiab koj yuav tau muab ob peb yam haujlwm me me rau koj ua, xws li kos lub voj voog thiab sau koj lub npe. Cov haujlwm no yuav raug rov ua dua thaum lub sijhawm kho mob kom pom tias koj qhov kev co puas txo qis.

6.Kev Tswj thiab Kev Nyab Xeeb: Ua ntej, lub tshuab ultrasound uas muaj zog tsawg raug xa mus kom paub tseeb tias lub hom phiaj yog qhov tseeb. Tom qab ntawd, lub zog maj mam nce ntxiv. Lub hlwb raug saib xyuas nrog MRI txhua lub sijhawm. Yog tias koj muaj teeb meem lossis xav tias tsis xis nyob, muaj ib lub pob hauv koj txhais tes uas tso cai rau koj kom nres kev kho mob txhua lub sijhawm .

Thaum kho tiav lawm, tag nrho cov khoom siv yuav raug tshem tawm ntawm koj lub taub hau thiab koj yuav raug xa mus rau chav kho mob kom soj ntsuam. Tag nrho cov txheej txheem feem ntau siv sijhawm li 3-4 teev.

Cov txiaj ntsig thiab kev pheej hmoo ntawm kev kho mob no yog dab tsi?

Ib yam li lwm yam kev kho mob, qhov no muaj cov txiaj ntsig thiab qee qhov kev pheej hmoo.

Cov txiaj ntsig Cov Kev Mob Tshwm Sim thiab Kev Pheej Hmoo
  • Tsis tas yuav txiav daim tawv nqaij.
  • Tsis tas yuav tho lub pob txha taub hau.
  • Tsis muaj cov khoom siv twg tau cog rau hauv lub cev.
  • Kev siv hluav taws xob tsis siv.
  • Tsis muaj tshuaj loog tag nrho.
  • Qhov kev pheej hmoo ntawm kev kis kab mob lossis los ntshav yog tsawg.
  • Koj tuaj yeem pom cov txiaj ntsig tam sim ntawd.

Feem ntau ib ntus:

  • Xeev siab thiab mob taub hau (thaum lub sijhawm kho mob).
  • Tsis muaj zog ntawm cov ntiv tes lossis daim di ncauj.
  • Teeb meem nrog kev taug kev thiab kev sib npaug.
  • Nyuaj hais lus los yog nqos.

Tej yam txaus ntshai uas yuav tshwm sim:

  • Kev tshee hnyo tuaj yeem rov tshwm sim dua lub hlis lossis xyoo tom qab.
  • Tej zaum qhov kev tshee hnyo yuav tsis zoo dua li.
  • Tsis tshua muaj (kwv yees li 10-15%), cov mob xws li cov leeg tsis muaj zog thiab loog yuav nyob mus ib txhis.

Qhov no puas yuav kho tau kuv tus kab mob tag nrho?

Qhov no yog ib qho teeb meem uas ntau tus neeg muaj. Tsis yog, hmoov tsis zoo qhov no yuav tsis kho koj tus kab mob kom zoo tag nrho. Qhov no tsuas yog kev kho mob rau tus kab mob xwb. Qhov ntawd yog, nws tswj tau qhov tshee hnyo, uas yog ib qho tsos mob ntawm tus kab mob, tab sis kev kho mob no tsis tuaj yeem kho qhov ua rau tus kab mob lossis tiv thaiv tus kab mob kom tsis txhob loj hlob ntxiv.

Leej twg tsis haum rau kev kho mob no?

Txoj kev kho mob no tsis haum rau qee tus neeg.

  • Yog koj muaj cov khoom siv hlau uas tsis sib haum nrog MRI (piv txwv li, cov tshuab pacemakers, qee qhov kev hloov pob qij txha).
  • Yog tias muaj cov qhov txhab zoo li cov kua qaub ncaug ntawm lub taub hau.
  • Yog tias muaj cov qog hauv lub taub hau.
  • Yog tias koj yog ib tus neeg mob uas tab tom ntxuav dialysis.
  • Yog koj muaj cov kab mob hnyav uas tsis tuaj yeem tswj tau lossis lwm yam kab mob.
  • Yog tias koj tsis tuaj yeem nyob twj ywm hauv tib qho chaw li 4 teev.
  • Yog tias koj tsis tuaj yeem tsum tsis txhob noj cov tshuaj ua kom cov ntshav nyias.

Qhov kev txiav txim siab zaum kawg seb qhov kev kho mob no puas yog rau koj yuav yog koj tus kws kho mob thiab nws pab neeg kho mob ua. Lawv yuav tshuaj xyuas koj tus mob kom zoo thiab tham nrog koj seb kev kho mob twg zoo tshaj plaws rau koj.

Cov Lus Qhia Txog Kev Coj Mus Tsev

  • MR-Guided Focused Ultrasound yog kev kho mob tsis tas phais rau kev co thiab tus kab mob Parkinson uas tsis tuaj yeem tswj tau nrog tshuaj.
  • Qhov no tso cai rau kev kho mob ntawm qhov tseem ceeb ntawm lub hlwb siv cov duab ultrasound, coj los ntawm MRI thev naus laus zis, yam tsis tau qhib lub pob txha taub hau.
  • Qhov no tsis yog kev kho rau tus kab mob, tab sis tsuas yog kev kho mob uas tswj cov tsos mob ntawm kev tshee hnyo.
  • Txawm hais tias kev kho mob no muaj ntau yam txiaj ntsig los xij, nws tuaj yeem ua rau muaj kev phiv ib ntus, thiab, tsis tshua muaj, muaj kev pheej hmoo mus tas li.
  • Yuav kom paub tseeb tias qhov kev kho mob no puas yog rau koj, koj yuav tsum nrog koj tus kws kho mob tham thiab txiav txim siab tom qab kuaj mob tag nrho.

Kev tshee hnyo, kev co, Parkinson's, Kev tshee hnyo tseem ceeb, MR-guided focused ultrasound, phais hlwb, cov kab mob neurological

Frequently Asked Questions (FAQ)

Leej twg tsis haum rau kev kho mob no?

Txoj kev kho mob no tsis haum rau qee tus neeg.

⚠️ Important: The medical articles and information on Nirogi Lanka are for general awareness only, and are by no means a substitute for professional medical advice, diagnosis, or treatment. For any medical problem you have, consult a qualified physician immediately.

💬 Comments (0)

Tsis muaj lus teb tau muab tso tawm. Ntxiv koj cov lus tawm ntawm no thawj zaug.

Ntxiv koj cov lus

Thov xam: 5 + 8 =
Kev kho mob tshiab uas tsis tas phais rau tes thiab taw tshee hnyo? (MR-Guided Focused Ultrasound)
Kev phais mobSeptember 9, 2025

Kev kho mob tshiab uas tsis tas phais rau tes thiab taw tshee hnyo? (MR-Guided Focused Ultrasound)

Koj lossis ib tug neeg koj paub puas muaj mob tshee hnyo? Qee zaum qhov no yuav ua rau koj tsis xis nyob uas koj tsis tuav tau ib khob tshuaj yej lossis kos npe rau daim ntawv. Niaj hnub no, peb tab tom tham txog kev kho mob tshiab uas tuaj yeem ua tau yam tsis tas phais rau cov neeg uas muaj teeb meem tswj tus mob no txawm tias noj tshuaj. Qhov no hu ua MR-Guided Focused Ultrasound.

MR-Guided Focused Ultrasound (MRgFUS) yog dab tsi?

Hais yooj yim xwb, qhov no yog kev sib xyaw ua ke ntawm ob txoj kev. Xav txog nws zoo li txoj haujlwm ntawm ob pab neeg muaj peev xwm heev ua haujlwm ua ke.

  • Kev Siv Duab Xam Xaj Sib Nqus (MR): Qhov no yog qhov uas qhia txoj kev. Peb txhua tus paub tias kev luam theej duab MRI tuaj yeem thaij duab meej thiab ntxaws ntxaws ntawm cov kabmob hauv peb lub cev. Thaum lub sijhawm kho mob no, cov duab MRI no pab cov kws kho mob pom tseeb tias lawv xav tau kev kho mob qhov twg hauv lub hlwb, thiab tseem saib xyuas seb txhua yam puas mus zoo thaum lub sijhawm kho mob.
  • Kev Siv Ultrasound Uas Muaj Lub Suab Nrov: Nov yog tus neeg uas ua kev kho mob. Ultrasound yog lub suab nrov uas peb pob ntseg tsis hnov. Cov suab nrov no tuaj yeem hla dhau cov ntaub so ntswg xws li peb daim tawv nqaij, rog , thiab pob txha. Hauv kev kho mob no, ntau dua 1,000 lub teeb ultrasound raug sib koom ua ke thiab tsom mus rau lub hom phiaj me me hauv lub hlwb uas MRI pom. Tom qab ntawd, tsuas yog thaj chaw ntawd kub hnyiab, ua rau muaj qhov kub hnyiab me me (mob). Qhov no rhuav tshem cov ntaub so ntswg tsis zoo. Tab sis cov ntaub so ntswg noj qab haus huv nyob ib puag ncig tsis raug mob .

Kev kho mob no yuav txo qhov kev co li cas?

Muaj ib feem ntawm peb lub hlwb hu ua thalamus. Nws zoo li lub tsheb ciav hlau sib tshuam. Nws xa cov cim qhia txog peb lub cev txoj kev txav mus los thiab kev xav rov qab los. Hauv cov kab mob zoo li Essential Tremor thiab Parkinson's, kev ua haujlwm ntawm thalamus no dhau los ua qhov tsis zoo. Qhov ntawd yog qhov ua rau muaj kev co .

Hauv kev kho mob no, cov duab ultrasound tsim ib qho mob me me hauv lub hlwb lub thalamus, uas cuam tshuam lub voj voog ua haujlwm tsis zoo. Thaum qhov kev cuam tshuam ntawd tshwm sim, qhov kev co yuav luag ploj mus tam sim ntawd.

Cov xwm txheej tau pom zoo rau kev kho mob Cov ntaub ntawv tseem ceeb
Kev tshee hnyo tseem ceeb Rau cov mob uas tsis tuaj yeem tswj tau nrog tshuaj. Yuav tsum muaj hnub nyoog tshaj 22 xyoos. Tau pom zoo kom kho ob sab ntawm lub cev.
Kab mob Parkinson uas muaj kev tshee hnyo feem ntau Rau cov neeg mob Parkinson uas muaj tsos mob tseem ceeb yog tshee hnyo. Yuav tsum muaj hnub nyoog tshaj 30 xyoo.
Cov xwm txheej uas raug sim siab Cov thev naus laus zis no tseem nyob rau theem kev tshawb fawb los kho cov mob tshee hnyo, qaug dab peg, mob neuropathic, thiab mob qog hauv hlwb uas cuam tshuam nrog ntau yam sclerosis (MS).

Cia peb kawm txog seb kev kho mob ua haujlwm li cas.

Qhov no yuav zoo li ntshai me ntsis, tab sis nws yog ib qho txheej txheem uas tau npaj tseg thiab muaj kev nyab xeeb heev. Koj yuav sawv txhua lub sijhawm, yog li koj tuaj yeem tham nrog pab pawg kho mob.

1. Kev Npaj: Thaum sawv ntxov ntawm kev kho mob, koj lub taub hau yuav raug txiav. Qhov no yog vim tias cov duab ultrasound yuav tsum kov koj daim tawv nqaij. Koj lub plawv dhia thiab ntshav siab yuav raug saib xyuas tas li.

2. Lub Taub Hau: Tom ntej no, koj lub taub hau yuav raug khi rau hauv ib lub thav tshwj xeeb kom tiv thaiv nws kom tsis txhob txav mus los. Koj yuav tau txais tshuaj kom koj so kom txaus thaum lub sijhawm no, yog li tsis muaj dab tsi yuav tsum txhawj txog.

3. Lub tshuab cua txias: Ib daim nyias nyias silicone siv los ncig cov dej txias ntawm koj lub pob txha taub hau thiab lub cuab yeej ultrasound. Qhov no pab tiv thaiv koj lub taub hau kom tsis txhob kub dhau.

4. Hauv lub tshuab MRI: Koj yuav raug yuam kom pw saum txaj MRI. Koj lub taub hau yuav raug ntsia rau ntawm txaj kom koj tsis tuaj yeem txav koj lub taub hau. Tom qab ntawd, yuav muaj kev tshuaj xyuas ntau zaus rau lub hlwb kom paub tseeb tias qhov chaw kho mob yog qhov tseeb.

5. Pib kev kho mob: Ua ntej pib kev kho mob, koj qhov kev co yuav raug soj ntsuam thiab koj yuav tau muab ob peb yam haujlwm me me rau koj ua, xws li kos lub voj voog thiab sau koj lub npe. Cov haujlwm no yuav raug rov ua dua thaum lub sijhawm kho mob kom pom tias koj qhov kev co puas txo qis.

6.Kev Tswj thiab Kev Nyab Xeeb: Ua ntej, lub tshuab ultrasound uas muaj zog tsawg raug xa mus kom paub tseeb tias lub hom phiaj yog qhov tseeb. Tom qab ntawd, lub zog maj mam nce ntxiv. Lub hlwb raug saib xyuas nrog MRI txhua lub sijhawm. Yog tias koj muaj teeb meem lossis xav tias tsis xis nyob, muaj ib lub pob hauv koj txhais tes uas tso cai rau koj kom nres kev kho mob txhua lub sijhawm .

Thaum kho tiav lawm, tag nrho cov khoom siv yuav raug tshem tawm ntawm koj lub taub hau thiab koj yuav raug xa mus rau chav kho mob kom soj ntsuam. Tag nrho cov txheej txheem feem ntau siv sijhawm li 3-4 teev.

Cov txiaj ntsig thiab kev pheej hmoo ntawm kev kho mob no yog dab tsi?

Ib yam li lwm yam kev kho mob, qhov no muaj cov txiaj ntsig thiab qee qhov kev pheej hmoo.

Cov txiaj ntsig Cov Kev Mob Tshwm Sim thiab Kev Pheej Hmoo
  • Tsis tas yuav txiav daim tawv nqaij.
  • Tsis tas yuav tho lub pob txha taub hau.
  • Tsis muaj cov khoom siv twg tau cog rau hauv lub cev.
  • Kev siv hluav taws xob tsis siv.
  • Tsis muaj tshuaj loog tag nrho.
  • Qhov kev pheej hmoo ntawm kev kis kab mob lossis los ntshav yog tsawg.
  • Koj tuaj yeem pom cov txiaj ntsig tam sim ntawd.

Feem ntau ib ntus:

  • Xeev siab thiab mob taub hau (thaum lub sijhawm kho mob).
  • Tsis muaj zog ntawm cov ntiv tes lossis daim di ncauj.
  • Teeb meem nrog kev taug kev thiab kev sib npaug.
  • Nyuaj hais lus los yog nqos.

Tej yam txaus ntshai uas yuav tshwm sim:

  • Kev tshee hnyo tuaj yeem rov tshwm sim dua lub hlis lossis xyoo tom qab.
  • Tej zaum qhov kev tshee hnyo yuav tsis zoo dua li.
  • Tsis tshua muaj (kwv yees li 10-15%), cov mob xws li cov leeg tsis muaj zog thiab loog yuav nyob mus ib txhis.

Qhov no puas yuav kho tau kuv tus kab mob tag nrho?

Qhov no yog ib qho teeb meem uas ntau tus neeg muaj. Tsis yog, hmoov tsis zoo qhov no yuav tsis kho koj tus kab mob kom zoo tag nrho. Qhov no tsuas yog kev kho mob rau tus kab mob xwb. Qhov ntawd yog, nws tswj tau qhov tshee hnyo, uas yog ib qho tsos mob ntawm tus kab mob, tab sis kev kho mob no tsis tuaj yeem kho qhov ua rau tus kab mob lossis tiv thaiv tus kab mob kom tsis txhob loj hlob ntxiv.

Leej twg tsis haum rau kev kho mob no?

Txoj kev kho mob no tsis haum rau qee tus neeg.

  • Yog koj muaj cov khoom siv hlau uas tsis sib haum nrog MRI (piv txwv li, cov tshuab pacemakers, qee qhov kev hloov pob qij txha).
  • Yog tias muaj cov qhov txhab zoo li cov kua qaub ncaug ntawm lub taub hau.
  • Yog tias muaj cov qog hauv lub taub hau.
  • Yog tias koj yog ib tus neeg mob uas tab tom ntxuav dialysis.
  • Yog koj muaj cov kab mob hnyav uas tsis tuaj yeem tswj tau lossis lwm yam kab mob.
  • Yog tias koj tsis tuaj yeem nyob twj ywm hauv tib qho chaw li 4 teev.
  • Yog tias koj tsis tuaj yeem tsum tsis txhob noj cov tshuaj ua kom cov ntshav nyias.

Qhov kev txiav txim siab zaum kawg seb qhov kev kho mob no puas yog rau koj yuav yog koj tus kws kho mob thiab nws pab neeg kho mob ua. Lawv yuav tshuaj xyuas koj tus mob kom zoo thiab tham nrog koj seb kev kho mob twg zoo tshaj plaws rau koj.

Cov Lus Qhia Txog Kev Coj Mus Tsev

  • MR-Guided Focused Ultrasound yog kev kho mob tsis tas phais rau kev co thiab tus kab mob Parkinson uas tsis tuaj yeem tswj tau nrog tshuaj.
  • Qhov no tso cai rau kev kho mob ntawm qhov tseem ceeb ntawm lub hlwb siv cov duab ultrasound, coj los ntawm MRI thev naus laus zis, yam tsis tau qhib lub pob txha taub hau.
  • Qhov no tsis yog kev kho rau tus kab mob, tab sis tsuas yog kev kho mob uas tswj cov tsos mob ntawm kev tshee hnyo.
  • Txawm hais tias kev kho mob no muaj ntau yam txiaj ntsig los xij, nws tuaj yeem ua rau muaj kev phiv ib ntus, thiab, tsis tshua muaj, muaj kev pheej hmoo mus tas li.
  • Yuav kom paub tseeb tias qhov kev kho mob no puas yog rau koj, koj yuav tsum nrog koj tus kws kho mob tham thiab txiav txim siab tom qab kuaj mob tag nrho.

Kev tshee hnyo, kev co, Parkinson's, Kev tshee hnyo tseem ceeb, MR-guided focused ultrasound, phais hlwb, cov kab mob neurological

Frequently Asked Questions (FAQ)

Leej twg tsis haum rau kev kho mob no?

Txoj kev kho mob no tsis haum rau qee tus neeg.

⚠️ Important: The medical articles and information on Nirogi Lanka are for general awareness only, and are by no means a substitute for professional medical advice, diagnosis, or treatment. For any medical problem you have, consult a qualified physician immediately.

💬 Comments (0)

Tsis muaj lus teb tau muab tso tawm. Ntxiv koj cov lus tawm ntawm no thawj zaug.

Ntxiv koj cov lus

Thov xam: 5 + 8 =