🦴 TKR - Total Knee Replacement (Ghutne ka Operation)

TKR Kya Hota Hai?

• Femur (thigh bone) ka nichla hissa - dhatu (metal) se cover karte hain
• Tibia (shin bone) ka upar ka hissa - ek metal baseplate + plastic (polyethylene) insert lagaate hain
• Patella (ghutni ki taraf wali haddi) - bhi plastic se resurface karte hain

Kab Karna Padta Hai? (Indications)

1. Ghutne ka arthritis bilkul end-stage ho - matlab dono haddiyan ek doosre se directly ghis rahi hon
2. Conservative treatment fail ho gaya ho - dawai, physiotherapy, injections sab try ho chuke hon
3. Teeno compartment (medial, lateral, patellofemoral) mein problem ho

Note: Agar sirf ek compartment mein bimari ho to UKR (Unicompartmental Knee Replacement) hota hai, pura TKR nahi.

Ghutne ki Anatomy - Jaldi Samjhe

       FEMUR (thigh)
          |
   [Medial | Lateral]  ← 2 tibiofemoral compartments
          |
       TIBIA (leg)
          
  Aage: PATELLOFEMORAL compartment (ghutni ke saamne)

Operation Kaisa Hota Hai?

Incision (Chira)

• Medial parapatellar approach - patella ke medial side se, upar 5 cm aur neeche tibial tubercle tak
• Patella ko side mein dislocate (hatate) hain taaki andar dekh sakein

Bone Cuts (Haddi Kaatna)

• Preoperative templating (naap-jaokh) ke basis par cuts lagate hain
• Cutting guides use hoti hain
• Mechanical axis ke saath align karte hain

Components (Kitne Parts Lagte Hain)

Cement

• Zyaadatar PMMA cement (bone cement) se fix hota hai
• Kuch uncemented designs bhi hain jo bone ingrowth par depend karte hain

CR vs PS - Do Types

• PCL (Posterior Cruciate Ligament) ko bacha ke rakhte hain
• Normal knee structure preserve hoti hai
• Bone loss kam hoti hai

• PCL sacrifice kar dete hain
• Components mein ek box-cam mechanism hoti hai jo PCL ka kaam karti hai
• Results dono mein equal hain

Alignment Kyun Zaruri Hai?

• ✅ Deformity correct karo
• ✅ Leg ko mechanical axis ke saath align karo
• ✅ Joint line ground ke parallel rakho
• ✅ Collateral ligaments balanced rakho
• ✅ Patellofemoral tracking normal rakho

Complications (Dikkatein)

Operation ke Dauraan (Intraoperative)

• Implant ki galat positioning
• Nerve ya blood vessel injury
• Haddi toot jaana (fracture)
• Patellar tendon avulsion
• Fat embolism

Operation ke Baad (Postoperative)

• 🦠 Infection (sabse badi takleef)
• 🩸 DVT / PE (khoon ka thakka)
• 😣 Dard aur stiffness
• ⚡ Instability
• 🔩 Component loosening
• Osteolysis (haddi pighal jaana)

Results Kitne Achhe Hain?

• 95%+ implants 10-15 saal tak theek rehte hain
• 82% implants 20 saal tak survive karte hain
• Revision (dobara operation) rate: sirf 2-6% in 10 years
• Pehle kuch saalon mein revision most commonly infection ya instability se
• 10 saal baad revision most commonly aseptic loosening se

💡 Hip replacement ke mukable TKR mein patient satisfaction thoda kam hota hai - ghutna ek complex joint hai!

UKR vs TKR - Quick Comparison

Robot aur Computer Navigation

• Intraoperatively real-time feedback dete hain
• Component placement aur bone cuts zyaada accurate hoti hain
• Disadvantage: costly, time zyaada lagta hai

🦴 Total Knee Replacement (TKR) - Poori Kahani

📖 Pehle Samjho - Problem Kya Hoti Hai?

• Upar se Femur (jaangh ki haddi)
• Neeche se Tibia (paon ki haddi)
• Aage Patella (ghutni/kneecap)

🤔 TKR Kab Karte Hain?

"Jab sab kuch fail ho jaaye, tab TKR"

🔧 TKR Aslam Mein Kya Hai?

       FEMUR
    ___________
   | METAL CAP |  ← Femoral Component (metal)
   |___________|
         |
   [Plastic pad] ← Polyethylene Insert (cushion)
   ___________
   | METAL    |  ← Tibial Baseplate (metal)
   |  TRAY    |
       |||
     TIBIA

   + Patella (ghutni) = Plastic button

• Femur par ek metal ki topi (cap) lagti hai
• Tibia par ek metal ki thaali (baseplate) lagti hai
• Beech mein plastic ka cushion (polyethylene) hota hai jo real cartilage ki jagah kaam karta hai
• Patella par bhi plastic button lagta hai

🏥 Operation Kaise Hota Hai? (Step by Step)

Step 1 - Anesthesia

Step 2 - Chira lagana (Incision)

• Medial parapatellar approach - ghutne ke aage, patella ke thoda andar ki side se
• Upar 5 cm patella se aur neeche tibial tubercle tak ek seedi line mein chira

Step 3 - Ghutne ke andar jaana

• Patella ko side mein dislocate karte hain (hataate hain)
• Ab teeno compartments clearly dikh jaate hain

Step 4 - Kharab surface kaatna

• Jitni kharab cartilage + thodi si haddi hai - usse cutting guides se precisely kaata jaata hai
• Preoperative planning se exact naap-jaokh pehle se tayaar hoti hai

Step 5 - Implant lagana

• Femur par metal cap
• Tibia par metal tray
• Beech mein plastic insert
• Patella par plastic button
• Sab kuch PMMA cement (bone cement) se chipkaya jaata hai - jaise tiles lagaane mein grout use hota hai

Step 6 - Balance check karna

• Flexion aur extension mein gaps check karte hain
• Ligaments balanced hain ya nahi dekhte hain
• Patella track kar rahi hai ya nahi check karte hain

Step 7 - Band karna

• Wounds close karte hain
• Drain lagaate hain
• Bandage

⚖️ CR vs PS - Do Types of TKR

😰 Complications - Kya Kya Ho Sakta Hai?

Operation ke dauraan:

• Implant galat position mein lag gaya
• Nerve ya blood vessel cut ho gaya
• Haddi toot gayi
• Patellar tendon ukhad gaya
• Fat embolism

Operation ke baad:

• 🦠 Infection - sabse dreaded complication
• 🩸 DVT/PE - khoon ka thakka (isliye baad mein jaldi chalna karvate hain!)
• 😣 Dard aur stiffness - physiotherapy zaroori
• 🔩 Loosening - implant hilne lagta hai
• Osteolysis - plastic ke ghiste particles se haddi pighal jaati hai

📊 Results Kitne Achhe Hain?

✅ 95%+ implants → 10-15 saal tak theek
✅ 82% implants  → 20 saal tak survive
✅ Revision rate → sirf 2-6% in 10 years
✅ Dard mein → significant relief
✅ Chal phir sakein → improvement in mobility

Ek interesting baat - hip replacement ke patients zyaada satisfied hote hain TKR ke mukable. Kyunki ghutna ek complex joint hai, 100% natural feel nahi aata artificial ghutne mein.

🆚 TKR vs UKR - Kab Kya?

🏃 Recovery Kaisi Hoti Hai?

• Same day / next day - physiotherapist chalna sikhata hai
• 2-4 din - hospital mein rehna
• 6 hafton mein - normal ghar ka kaam
• 3 mahine mein - zyaadatar normal
• 1 saal mein - poora result pata chalta hai