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Date of Last Formal Post-Dialysis Weight

Published: August 9, 2026Updated: August 17, 2026

Records the date of the most recent formally documented post-dialysis weight, used to help track fluid balance and dialysis care.

Quick summary

["This is a date in your dialysis record, not a blood test result."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
72074-8
Short code
DATELASTFORMALPOSTDIALYSISWEIGHT
Synonyms
—
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
esrd
CPT
84484
SNOMED
302774002
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

This item records when your weight was last measured after a formal dialysis session. It helps your dialysis team follow changes in post-dialysis weight over time.

Why might I need this test?

Your care team may use this date to confirm that post-dialysis weights are being monitored regularly. Tracking these weights can help assess fluid removal and determine whether your dry weight may need adjustment.

How is the test performed?

After dialysis, your weight is measured using a calibrated scale and documented in your dialysis record. This entry identifies the date of the most recent formal post-dialysis measurement.

How do I prepare for the test?

No special preparation is usually needed. Follow your dialysis center's instructions about timing, clothing, and removing items that could affect the weight measurement.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

The date itself is not abnormal and does not indicate a specific condition. It supports follow-up by showing when your post-dialysis weight was last formally assessed. A change in measured weight may reflect fluid changes, shifts in body mass, or differences in post-dialysis status and should be interpreted by your dialysis team.

Short name

Post-Dialysis Weight Date

Frequently asked questions

Is this a blood test?
No. This entry records the date of a weight measurement taken after dialysis.
Why is post-dialysis weight important?
Post-dialysis weight helps your care team evaluate fluid removal and monitor your dry weight. The date confirms when the measurement was recorded.
What if my most recent weight measurement is old?
Ask your dialysis team to confirm or update your record. Regular measurements help your team identify changes that may require review.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy