RRT - Transplant Flashcards Preview

Yr 2 - Renal System > RRT - Transplant > Flashcards

Flashcards in RRT - Transplant Deck (20)
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1
Q

Where is a kidney transplant placed?

A

Right iliac fossa and anastomosed to the iliac vessels

2
Q

What happens to the native kidney?

A

Usually left in.
Removed if:
- Oversized e.g. polycystic kidney disease
- Infected e.g. Chronic Pyelonephritis

3
Q

List the medications used for immunosuppression in transplantees?

A

1) CCS
2) Calcineurin inhibitors (Tacrolimus or Cyclosporin)
3) Anti-proliferative (Azathioprine or Mycophenolate)
4) mTOR inhibitors (Sirolimus)
5) Costimulatory signal blockers (Belatacept)
6) Depleting agenets (Rituximab or basiliximab)

4
Q

Explain how we go about immunosuppressing patients?

A

Induction with basiliximab (depleting agent)

Maintenance with Tacrolimus (CNI), mycophenolate (Anti-proliferative) and steroids

Steroid free treatments can be used
CNI-free treatments replace tacrolimus with Belatacept

5
Q

what are the types of kidney donor?

A

Living:

  • Related
  • Spouse
  • Altruistic
  • Pooled/paired

Dead:

  • DBD (post brain death)
  • DCD (post cardiac death)
6
Q

What are the criteria for brain death?

A
Coma
Apnoea despite CO2 build up
Absent cephalic reflexes e.g. pupillary
Body temp >34
No drug intoxication
7
Q

What are the risks to the kidney donator?

A

Having one kidney puts you at higher risk of renal disease.
But the one compensates by increasing GFR up to 70%

Being older or having a high BMI is associated with ending up with a low GFR

8
Q

List the complications of transplant?

A
  • Anastomotic bleed
  • Perirenal Haematoma
  • Arterial/venous thrombosis
  • Lymphocele
  • Urine leak
  • Infection
  • Malignancy
  • Rejection
  • CV problems
9
Q

What kind of CV problems can arise post=transplant?

A

Hypertension
Hyperlipidaemia
Post transplant Diabetes!

10
Q

What kind of cancers does a renal transplant predispose to?

A
Desc. order:
1) Non-melanoma skin cancer
2) Melanoma
Leukaemia
Cervical
3) Testicular/bladder
11
Q

What are the major post-transplant infections?

A

CMV

Polyomaviridae (specifically BK or JC virus)

12
Q

How do you get a CMV infection?

A

Either reactivation of latent virus or transmission from donor tissue.
It affects 8% of transplants despite prophylaxis

13
Q

What can CMV infection cause?

A

CMV viraemia –> Tissue invasive disease

Affects many tissues e.g. hepatitis, nephritis, pneumonitis, colitis etc.

14
Q

What can BK associated nephropathy cause?

A

Ureteral Stenosis
Interstitial Nephritis
ESRF

15
Q

What are the risk factors for a BK associated nephropathy post-transplant?

A

Intense immunosuppression
Patient factors - Old, male, white, DM
Organ factors - HLA mismatch, graft injury or ureteral stent
Viral factors - Changes in viral capsid protein (VP-1)

16
Q

How do you treat BK infection?

A

Reduce the immunosuppression
Anti-virals:
- Cidofovir +/- IVIG
- OR Leflunomide

17
Q

What is hyperacute rejection?

A

When theres a pre-existing alloreactivity to the donor

18
Q

What are the modes of Acute Rejection?

A
T cell mediated (TCMR)
Antibody Mediated (ABMR)
19
Q

Explain the banff categorisation of TCMR?

A

Banff 1 - Tubulointerstitial
Banff 2 - Arteritis/Endothelialitis
Banff 3 - Arterial Fibrinoid Necrosis

20
Q

Explain the Banff Categorisation of ABMR?

A

Banff 1 - ATN-like
Banff 2 - Capillary and/or glomerular inflammation
Banff 3 - Arteritis