MRI hmanga Knee Meniscus leh Ligament Injuries te hriat theih dan!

Meniscus hi meniscus ang chi fibrocartilage a ni a, tibial condyle leh plateau inkarah triangular cross-section a awm a, hei hian femoro-tibial joint consistency nasa takin a ti tha a, knee joint dynamics-ah pawh hmun pawimawh tak a chang a ni.

Normal Leh Abnormal Mr Findings te chu a rawn lang leh ta

Sagittal leh frontal image-ah chuan meniscus pangngai chu hypointense-ah triangular a ni. Lateral ber sagittal image-ah chuan meniscus hi 'bow-tie' structure a ni a, mid-sagittal section chu anterior leh posterior horn nena inzawm a ni (Figure 1).

Figure 1 MRI hmanga medial meniscus a lan dan pangngai. Proton density-weighted sagittal view: Hma lam leh hnunglam meniscal angle te hi homogeneous hypointense triangle an ni. Meniscus hi bow ang maia lian a ni a, a hma lam ki leh a hnung lama a hnung lam ki inzawmkhawmtu middle section section hrang hrang atanga siam a ni.

Anatomical abnormalities thenkhat chu meniscal split simulate theih a nih avangin hriatthiam a tangkai hle:

• Sagittal section-ah chuan transverse leh anterior ligament inkara inthlak danglamna;

• popliteal tendon khuhna (popliteal tendon) a awm a;

• Humphrey leh Wrisberg-a ​​te meniscus-femoral ligament hian lateral meniscus hnunglam horn chu medial femoral condyle nen a thlunzawm a;

• Oblique meniscus ligament, a chang chuan meniscus hmalam horn leh a hmalam meniscus hnunglam horn inzawmkhawmtu hian migrating meniscus emaw barrel handle emaw a entawn thei a ni

• Discoid meniscus hi pianpui meniscus deformity awm lo tak a ni. He meniscal dysplasia hian lateral meniscus chauh a nghawng deuh ber. MRI-a a 'academic' diagnosis chu sagittal image-a 5 mm thick slices 3 tal a zawnin a hmalam leh hnunglam horn awm chhunzawm zel hmuh atanga siam a ni (Fig. 2). Heng thil hmuhchhuah te hi partial settings hman dan atanga siamrem a ni.

Figure 2 Discoid lam hawi meniscus. Sagittal T1-a rit zawnga thlalak. 5mm fixed section 3 a zawna hma leh hnung corner chhunzawm zel. He discoid meniscus hmalam horn-a myxoid degeneration hi chhinchhiah ang che.

Meniscus Pathology hmanga thil hmuhchhuah a ni

Traumatic meniscus leh degenerative meniscus hi a bul berah chuan thliar hran hi thil tih dan tlangpui a ni. Traumatic injuries hi meniscus hrisel takah mechanical force tam lutuk hman avanga lo awm a ni. Tleirawl puitlingah chuan fissure hi indirect valgus injury avanga lo awm a ni tlangpui a, chu chu pawn lam atanga inher emaw, khup 20° of flexion-a hyperflexion emaw hnua tibia a sang nghal vang a ni. Chu ai chuan, degeneration hi interstitial myxoid degeneration avanga meniscus chhiat avanga normal mechanical forces hnathawh avanga lo awm a ni. Horizontal meniscal fissures hi a takin a lo awm thei a, hliam tenau vang pawh a ni thei bawk.

Classification hrang hrang

Cleavage plane kalna lam a zirin fissures hi horizontal fissures, vertical fissures emaw complex fissures emaw ah then theih a ni

A rilru a buai em em a. Horizontal Fissure

Tibial plateau nena inmil split plane a awm a, chu chuan meniscus chu superior leh inferior segment-ah a then a ni. Heng horizontal lesions te hi a darh zau hle a, medial emaw lateral meniscus emaw nasa takin a nghawng thei a, stable anga ngaih a ni a, mahse medial meniscus chhiat hnua groove chhunga debris migrate thin chu sawi a ni tawh bawk.

Vertical Fissure a awm

Tibial plane-ah perpendicular a ni a, meniscus circumference-ah a awm bawk. Hengte hian medial meniscus a nghawng tam zawk. Hliam tluantling chu unstable anga ngaih a ni a, meniscus chu medial leh lateral segment-ah a then a ni. Scanning level-ah hian lateral meniscus body leh posterior horn of the meniscus te pawh a tel a, hei hi barrel handle tear anga hriat sual a awlsam a, hei hi khup ruh chu pawn lam atanga inher a nih chuan a thleng tam zawk a ni. Sagittal images nena khaikhin chuan barrel handle tear a awm lo thei (Figure 3).

A. Coronal MRI, arrow hian lateral meniscus hnunglam horn a kawk a, chu chu barrel handle crack anga hriat sual a awlsam a B. Figure-a dotted line-in a tarlanna hmun angin MRI scanning kan tih hian pseudo barrel handle tear a lo lang ang.

Radial fissures hi meniscus perimeter-ah perpendicular a ni a, a tlangpuiin meniscus free edge a nghawng thin.

Parrot hmui mittui

Mixed vertical damage a ni a, longitudinal component leh radial component cyclically-a free edge-a inzar pharh a ni.

A tawp berah chuan meniscal hliam buaithlak tak tak, sawifiahna chiang tak awm lo, horizontal leh vertical fissures tam tak awmna a awm.

Mri Meniscus Hliam A Nih Dan

Meniscus Tear tih a ni

Stoller leh a thawhpuiten an sawi. meniscus grade 3 a rawt a (Figure 4) .

Grade 1: Hyperintensity nodular meniscus chu meniscus chung lamah a awm reng a;

Grade 2: Signal sang tak linear meniscus chu meniscus chung lamah a awm reng a;

Grade 3: Hyperintensity hi meniscus articular surface pakhatah a inzar pharh a.

Figure 4 Stoller scale a ni. a: Grade 1: Meniscus articular surface nena inzawm intermediate nodular hyperintensity site pakhat emaw a aia tam emaw; b: Grade 2: Meniscus-a articular surface-a linear intermediate hyperintensity a awm a; c: Grade 3: Linear intermediate hyperintensity chu Meniscus-a articular surface-ah a inzar pharh a.

Grade 2 leh 3 inkara inthliarna hi a tlem hle nachungin, degenerative intrameniscal hyperintensity (Figure 5) leh fissures dik tak chu a thliar hrang a ni. Hetianga meniscus degenerated leh torn inthliarna hi a dik lo fo va, extra emaw missing emaw a lan avang hian tihsualna tam tak a awm bawk.

Figure 5. Meniscus-a degenerative appearance awm dan. Sagittal proton density thlir dan leh thau saturation. Signal sang tak takte chu fracture linear image dik tak awm lovin hmuh theih a ni.

Fimkhur tur: 1.1.

MRI hian performance tha tak a nei a, sensitivity leh specificity chu 90% leh 95% inkar a ni. MRI-ah chuan meniscal cleft chu meniscus articular surface pakhat (Stoller grade 3)-a intermediate linear hypointense extension angin a lang a, a nih loh leh pure morphological abnormality angin a lang bawk.

Mittui chu slice pakhat chauh a hmuh theih chuan harsatna engemaw zat a awm a, a bik takin false positive result a awm theihna a sang hle. Linear meniscus chhunga hyperintensity hian meniscal surface nasa takin a nghawng a nih chuan, chu chu section inhnaih pahnih tal a nih chuan pathological anga ngaih a tha. He concept hi image acquisition technique hman dan (3 atanga 4 mm section emaw isotropic mm section hmanga 3D volume hmuh emaw) a zirin siam danglam tur a ni.

Radial meniscal clefts hi a chang chuan an orientation ngaihtuah chuan hriat a harsa zawk thin. Chungte chuan morphological abnormalities a thlen ber a ni:

• Frontal image-ah free edge interruption emaw amputation emaw a awm a;

• Sagittal image-a meniscus bowtie chu a inzawm lo emaw, a inzawm lo emaw a lang (Figure 6);

Figure 6. Sagittal proton density-weighted view-a medial meniscus hmalam segment-a radial fissure awm. Medial meniscus truncated bow tie (arrow) a lan dan pangngai.

• Meniscus bo emaw 'ghost' emaw, radial gap awm lo emaw.

Bucket handle hmanga meniscus rupture hian longitudinally extending spondylolisthesis 10% vel a tibuaitu a ni. Hetiang a nih chuan MRI sensitivity hi 70% vel a ni a, hei hi diagnostic criteria hman dan azirin a ni.

MRI atanga thil hmuhchhuah ngaihven ngai:

A hmuh chhuah tam ber chu intercondylar region-a migrating fragment-te direct visualization a ni: 'double posterior cruciate ligament (PCL)' landmark hi medial meniscus a chhiat a, anterior cruciate ligament a awm loh chuan a langsar hle. Dislocated segment chu normal posterior cruciate ligament nena inmil arcuate hypointense band angin a lang a, 'double PCL' angin a lang (Fig. 7). Rake horn tam lutuk (6 mm aia lian) hian barrel handle awmna a lantir thei bawk (Figure 8). Chutiang a nih chuan meniscus fragment dislocated chu anterior horn hrisel takah a inzawm a ni.

Figure 7 Medial meniscus handle lan dan hian 'double PCL' chhinchhiahna a nei a. Sagittal PD-weighted view with fat suppression: Meniscus fragment dislocated (arrow) chu PCL pangngai (arrow) hnuaiah a awm a, a characteristic 'double PCL' appearance a siam a ni.

Figure 8 Hma lam ki lian tak lan dan. Sagittal proton density rit zawng atanga thlir chuan. Dislocated fragment (arrow) hmalam chu anterior meniscus angle (arrow)-ah a inzawm a. Hnung lam kil (*) a lang lo tih hre reng ang che.

MRI atanga thil hmuhchhuah dangte:

MRI chhinchhiahna dang, bow tie bo, inverted meniscus sign, emaw, millimeter frontal image (Fig. 9) emaw axial image emaw-a intercondylar region-a direct-a meniscal fragment displaced te hi a dik tih finfiah a ni tawh bawk.

Figure 9 Slot chhunga bucket handle inthlak danglam. Fat tihtlem hnua hmalam PD-weighted view. Dislocated meniscus fragment (arrow) chu ACL (arrow) nen a inzawm a ni.

Meniscal instability formal sign dang chu meniscal fragment te chu femoral meniscal recess emaw femoral-tibial recess emaw-a peripheral displacement hriatchhuah hi a ni. Heng displacement te hi medical meniscus chauh a ni deuh ber a, 10% ah chuan horizontal cleft case thenkhatah chuan complication a ni. Coronal leh transverse section te hi heng fragment te hi hriat theihna tha ber a ni.

Meniscus Detachment atanga lo chhuak a ni

Meniscal detachment hi valgus hliam na tak avanga lo awm a ni a, meniscus’ capsular appendage rupture vang a ni. Hengte hian joint capsule (the posterior oblique ligament) thickening hmangin joint capsule-a inzawm medial meniscus hnunglam horn chu a nghawng duh hle.

Anni hian sagittal image-ah tibial plate hnunglam ramri atanga superior meniscus-ah 5 mm offset a thlen a (Fig. 11), a nih loh leh meniscus base leh joint capsule plane inkarah fluid insertion a thlen bawk.

Figure 11 Meniscus hnunglam ki atanga inthlak danglamna. Sagittal proton density atanga thlir chuan. Meniscus inthen chu hmalam hawiin a inthlak a. Meniscus base leh posterior capsule (arrow) inkarah hian hyperintensity (*) hmun zau tak a awm a.

Meniscus tui chunga awm

Hei hi hliam na tak avanga lo awm a ni a, meniscal-tibial ligament rupture leh meniscus medial portion detachment vang a ni. MRI-ah chuan meniscus inthen chu tuiin a hual vek a, tibial plateau-ah 'float' angin a lang (Figure 12).

Figure 12 Meniscus tui chunga awm. Proton density hmalam atanga thlir chuan thau saturation a awm. Meniscus inthen chu tuiin a hual vel a, a bik takin a hnuai lam leh tibial plateau (arrow) inkarah a awm a ni.

Operation hnua Meniscus tih a ni

Meniscectomy hnua natna lo lang leh hian diagnostic harsatna tam tak a thlen a: fissures lo awm leh thin, postmeniscectomy, chondrolysis, subchondral necrosis, emaw arthralgia. MRI hian recurrent fissures a hmu thei lo fo thin a, a chhan chu meniscectomy hian intermediate hyperintensities a hnutchhiah a, chu chu meniscus surface nen 'dik lo takin' inbiak a ni. Pathological anga ngaih leh recurrent fissure anga hrilhfiah awm chhun chu T2-weighted images-a fluid intrameniscal hyperintensity a ni. Heng simple MRI chauh a tihkhawtlai te hian ziaktu thenkhat chu MRI arthroscopy hman dan tur rawtna siam turin a fuih a, mahse hetah pawh hian hetah hian result hi a inmil lo hle.

Orthopaedic Implant leh Orthopaedic Instruments lei dan tur!

Tan CZMEDITECH , kan nei a, orthopaedic surgery implant leh a kaihhnawih instruments product line kimchang tak kan nei a, a product te pawh a tel spine implant te pawh a awm, intramedullary nail a awm bawk, trauma plate a ni, locking plate a ni, lu (cranial-maxillofacial) a ni, prosthesis hmanga siam a ni, power hmanrua hmanga siam a ni, pawn lam atanga fixator te, arthroscopy hmanga enfiah a ni, ran enkawlna leh an puitu instrument set te.

Chu bakah, doctor leh damlo tam zawkte surgical mamawh phuhrukna tur leh, khawvel pum huapa orthopedic implants leh instruments industry pumpuiah kan company hi inelna nei zawka siam theih nan, product thar siam chhunzawm zel leh product line tihpun zel kan tum a ni.

Khawvel pumah kan export a, chuvang chuan i ti thei ang email address song@orthopedic-china.com ah min rawn biak theih a, free quote i dawng thei a, WhatsApp ah message thawn la, chhanna rang tak +86- 18112515727 .

Thu belhchian dawl zawk hriat duh chuan,click rawh CZMEDITECH hian a chipchiar zawkin a zawt thei ang.