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 awm 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 siam 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 kal zel dan 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 vang 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 kawhhmuh a, chu chu barrel handle crack anga hriat sual a awlsam a B. Figure-a dotted line-in a lan dan 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 in free edge-ah 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. Meniscus fragment dislocated (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, horizontal cleft case thenkhatah chuan 10% ah 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 chuan 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 Implants leh Orthopaedic Instruments lei dan tur!

Tan CZMEDITECH , 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, lu (cranial-maxillofacial) a ni, prosthesis hmanga siam a ni, power hmanrua hmanga siam a ni, External Fixators, 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 huap Orthopedic implant-te leh instruments industry-a 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 ah hian a chipchiar zawkin a awm.