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Transplantation
The
cadaveric renal transplantation as well as the living related
renal transplantation have made large strides in the last 10
years. In 1999 a total of 264 renal transplants (188 living)
were performed in the Kingdom. But the commercial renal
transplantations performed abroad were 178, 194, 161
transplants in 1994, 1995, 1996 respectively. These figures
represent 41%, 42% 37% of all the transplants performed for
the patients in the Kingdom. This remains a major problem,
which has an ethical, medical as well as economical impact on
society. The surgical as well as the medical complications are
more common in the commercial transplantation than the
domestic cadaveric or living related kidney transplantations.
The success of cadaveric donation program will inevitably
reduce the need for commercial transplantation with its
associated drawbacks.
The average patient and graft survival rates of the cadaveric
renal transplants were 95% and 82% respectively after three
years, while the average patients and graft survival rates for
living related transplant were 95% and 92% respectively after
the same period of follow-up. There were 184 patients (7%) who
returned to dialysis after failure of the renal transplant
according to the SCOT date for 1995. This has a cumulative
effect over the years because such patients have less chance
of getting another transplantation. They are usually more
prone to depression and may become noncompliant to therapy.
Further study of such patients including survival on dialysis
is needed.
Finally, we conclude that dialysis and renal transplantation
are well-established methods of therapy for end stage renal
failure in the Kingdom of Saudi Arabia. Morbidity and
mortality are close to the international figures. SCOT tries
to reach out to all dialysis units and to recruit all the
efforts to help promoting the practice of dialysis as well as
transplantation as modes of modes of renal replacement
therapy.
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Recommendations
by the Saudi Center for Organ Transplantation for practice of
renal replacement therapy
Chronic
renal failure (CRF)
Predialysis:
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Early
referral of patients with elevated serum creatinine
to nephrology clinic.
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The
frequency of follow-up by the nephrologists is
judged individually.
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In
case of diabetic nephropathy, a joint specialist
diabvetic/renal clinic is of considerable advantage.
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- Antihypertensives:
ACE inhibitors, Calcium channel blockers, Beta
Adrenergic blockers, a-agonists.
- Phosphate
binders: Calcium based and/or Aluminum based.
Calcium acetate is preferred.
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Blood
pressure control is so far the intervention (Other
than treatment of the primary disease) that can slow
the progression of CRF. Optimal blood pressure
control is essential. ACE inhibitors have shown some
advantage over other antihypertensives, especially
in diabetics.
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Target
blood pressure should be:
Age < 60 - BP < 140/90
Age > 60 - BP <160/90
(For certain diabetic patients these may need to
lower).
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Optical
control of calcium, phosphate, iPTH and metabolic
acidosis is important and may well have an impact on
the progression of renal disease.
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Optical
control of anemia after ruling out nutritional
causes (iron deficiency, Erythropoitin
subcutaneously is beneficial).
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Renal
dietitian follow-up of patients at regular intervals
to optimize minerals, protein, fat and total calorie
intakes.
Total ranges for
. Serum calcium - - - 2.2 - 2.6 mmol/L.
. Serum Phosphate- - - 0.8-1.5 mmol/L.
. Serum iPTH - - -< or = Twice upper limit
of normal (intake molecute assay).
. Hemoglobin - - - - > or = 100 g/L.
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The
early diagnosis and prompt treatment of many forms
of renal diseases may prevent progression of renal
failure.
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Hemodialysis:
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Doctors
There should be a specialist in nephrology (with at
least one year training in nephrology) from a known
training center inside or outside the country. The
ratio should be one doctor to every 50 chronic
dialysis patients (maximum).
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Nurses
With a ratio of one nurse to every three patients
(maximum).
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Dietitian
One to every 80 patients (full time).
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Social
Worker
One to every 80 patients (full time).
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Place
should be spacious. Every patient should have at
least 7 square meter of space for him and his
machine. More than 20 machines in one unit should be
discouraged if possible.
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Isolation
areas can be assigned according to the adopted
policy of the units. Hepatitis B carriers should
have special isolation area. Hepatitis C antibody
positive patients may have an isolation are if
possible. The same is for HIV patients. Assigning
machines for hepatitis C and HIV patients is
mandatory.
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- Dialysis
machines
Specifications are available at SCOT.
- Water
treatment plants
Specifications are available at SCOT.
- Treated
water quality
Specifications are available at SCOT.
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- Dialyzers
Specifications are available at SCOT.
- Hemodialysis
solutions
Specifications are available at SCOT.
- Tubing
Specifications are available at SCOT.
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Prevention
of infection in the dialysis units
instructions are available at SCOT.
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Reuse
of dialyzers
is still not practical in Saudi Arabia and should be
discouraged if not forbidden.
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Renal
units should move towards universal availability of bicarbonate
dialysis.
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There
is still no consensus on using
synthetic high or low flux than cellulosic dialyzers,
despite some evidence of blood biocompatibility. No
standards for membrane type can be set at present.
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Hemoglobin
concentration of 100-120g/L in at least 80%
of the dialysis population should be achieved by
using Erythropoitin.
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If
the patient is on thrice weekly dialysis: EITHER a
stable urea reduction ratio (URR) > 55% at the
end of the longest inter-dialytic period. OR a
stable KT/V > 1.0
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If
the patient is no twice a weekly dialysis: EITHER a
stable URR > 80% OR a stable KT/V >1.8.
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Slipping
from thrice to twice weekly dialysis to accommodate
more patients in congested facilities or to reduce
costs should be discouraged.
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The
total capacity ratio of patients to the hemodialysis
machines should be 6 patients /one machine (equals
three shifts in the dialysis unit daily and six
working days per week). The total number of chronic
hemodialysis patients accepted to any dialysis
program should respect this ratio.
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The
following parameters are compatible with poor
outcome: Pre-dialysis.
. Serum bicarbonate < 17.0 mmol/L
(continuously).
. Serum Albumin < 30 g/L.
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Pre-dialysis
blood pressures to be achieved in at least 80% of
the dialysis population:
. Age < 65 - - - - -140/90
. Age > 65 - - - - -160/90
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Dietary
indiscretions should be discouraged. A dietitian
should follow the patients. A prescription of diet
should be given clearly to the patients. The
following pre-dialysis biochemical values are makers
of care given to patients.
. Potassium ---------- 3.0 - 6.5 mmol/L.
. Phosphate ---------- 1.1 - 2.0 mmol/L.
. Calcium ------------- 2.0 - 2.8 mmol/L.
. iPTH ---------------- 2 - 3 times
normal.
(intact hormone assay).
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There
are precautions against viral transmission, designed
both for protection of staff and to prevent cross
infection between patients should be instituted.
Patients should be managed as if they were chronic
virus carriers. See Appendix H (HBV) before
admission to a dialysis program and subsequently
every two months as minimum intervals.
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All
patients should be screened for hepatitis B (HBV)
before admission to a dialysis program and
subsequently every two months as inimum intervals.
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All
patients should be screened for HCV antibodies
before admission to a dialysis program. If positive
then there is no need to recheck the status, since
positivity may last for years,. if negative then to
recheck at a minimum of two months intervals.
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In
case of traveling (transient patients) rechecking
HBV antigen and HCV antibodies should be upon
arrival to the new unit and return to the original
unit.
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Patients
should be discouraged from unnecessary traveling to
other areas in orders to prevent cross infections.
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HIV
antibodies should be checked in case of traveling
abroad and at entry to a dialysis program.
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In
case of incidental usage of any dialysis machine for
a HBV, HCV or HIV carrier, the machine should be
sterilized with formaldehyde for 24 hours before
using it again on viral infection free patients.
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Annual
survival data should be prepared and ready for
review at any time. Sending the data annually to the
Saudi Center for Organ Transplantation is advisable.
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