A single donation can help up to three patients, takes about an hour door to door, and the needle part is roughly ten minutes. Blood cannot be manufactured and red cells last only about 42 days, so supply depends entirely on people turning up this week rather than at some point.
To be clear about our role: FHMC does not collect blood. We use it. In Arizona the regional blood provider is Vitalant, and their website lists donation centres and mobile drives.
Why an emergency room cares
It is not abstract for us. Blood is what we reach for in a major trauma, a severe gastrointestinal bleed, a post-partum haemorrhage, and in patients on chemotherapy or with sickle cell disease. A car crash on the 87 can consume a great deal of it in a short time.
Only a small fraction of eligible Americans donate in any year. That thin margin is why a holiday weekend can turn into a shortage.
Who can donate
General requirements for whole blood in the US: 17 or older (16 with parental consent in many states), at least 110 pounds, and in good general health on the day. You can donate whole blood roughly every 56 days.
You can usually donate with well-controlled conditions that people assume disqualify them:
- Controlled high blood pressure — if your reading on the day is within their limits
- Controlled diabetes, including on insulin
- Most cancers, after a period of being treatment-free — ask them
- Most people on most medications. Blood pressure drugs, statins and thyroid medication are generally fine.
A 2023 FDA change replaced the old blanket deferral for men who have sex with men with an individual risk assessment applied to everyone, which brought US policy in line with the evidence and expanded the eligible pool considerably. If you were turned away years ago under the old rule, you may well be eligible now.
Who should wait, or cannot donate
Wait a while if you: currently have a cold, flu or any infection; are pregnant, or are within six weeks of giving birth; have had a tattoo or piercing at a non-regulated facility recently; have had recent surgery; are on antibiotics for an active infection; or have recently travelled somewhere with malaria risk.
Iron is the common one. If your haemoglobin is below their threshold on the day you will be deferred — this is protective, not a rejection, and it happens most often to menstruating women and to frequent donors. Iron-rich food and, if a clinician advises it, a supplement between donations helps. Repeated deferral for low haemoglobin is itself worth investigating with us, because unexplained anaemia in an adult needs a cause found rather than just topping up.
Longer-term or permanent deferrals can apply with certain infections, some cardiac conditions, and a history of some cancers. Vitalant makes the call, not us, and their eligibility line will answer a specific question quickly.
What the visit is actually like
Registration and ID, then a short private health history and a finger-prick to check haemoglobin, then the donation itself — about 8 to 10 minutes for whole blood — then juice and a biscuit and fifteen minutes sitting down. Around an hour in total.
Beforehand: drink extra water the day before and that morning, eat a proper meal including something iron-rich, and sleep normally. Afterwards: keep drinking, skip heavy lifting and hard exercise for the rest of the day, and leave the bandage on for a few hours.
Feeling lightheaded afterwards is common and settles with fluids and sitting down. If you feel faint, lie down and raise your legs.
The Arizona problem: summer
Blood supply nationally dips in summer and around the holidays — schools and colleges, which host a large share of drives, are out, and regular donors travel. Trauma volumes meanwhile go *up* with more people outdoors.
Here that is compounded: our donor population thins out precisely when the heat is worst, because a large number of seasonal residents leave between May and October. Summer is the moment a donation is worth the most, and it is exactly when it is hardest to collect.
Two practical notes for donating in this climate: hydration matters more here than the standard advice implies, and do not donate on a day you have already been out in the heat or exercised hard — you will likely be deferred, and if you are not, you will feel worse afterwards than you need to.
If you cannot donate
Host or promote a drive. Volunteer at one. Donate platelets or plasma instead, which have different eligibility rules and shorter shelf lives — platelets last only about five to seven days, so they are perpetually short. And register as an organ and tissue donor, which costs nothing and is a separate decision from blood.
Where to go
To donate: contact Vitalant, Arizona’s regional blood provider, for centres and mobile drives. FHMC does not collect blood.
Book our Medical Clinic if you have been deferred repeatedly for low haemoglobin, want your iron checked, or want to know whether a condition or medication affects your eligibility. Call (602) 671-7981 — repeated low haemoglobin is a finding worth chasing rather than shrugging at.
Come to our Emergency Room — open 24 hours — if you feel genuinely unwell after donating, faint repeatedly, or have significant bleeding or swelling at the needle site: (602) 671-7990.
Related reading
- Nutrition at Every Age (and Why “Superfood” Means Nothing)
- Your Annual Health Checklist: What to Book, and When
- Why Living Near an Emergency Room Matters
Sources
- Vitalant — Donation eligibility
- American Red Cross — Eligibility requirements
- FDA — 2023 blood donor eligibility guidance
- AABB — Blood supply and demand