Total volume per HOF session: reference ranges

"How much can you do in one session?" is one of the most common questions from people just starting out and from those planning an extensive case. The short answer is that there is no magic number. There is a planning logic that combines areas, facial type, product, risk and patient tolerance, and produces conversation ranges that help organize the plan. This page explains how to think about those ranges, what makes them go up or down and how to avoid turning them into a target. There is no injection protocol here, and all decisions belong to the licensed professional, according to the rules of their professional council in Brazil.

What does "reference range" mean?

It is a reasoning frame: an interval within which the plan is usually discussed, given a type of case. It does not say what to do; it says what is reasonable to talk about before examining. After the exam, the range is revised or dropped. Treating the range as a rule is the first step toward excess.

A good practice is to record the range in the plan as a hypothesis, and the actual ml as the decision. That way, the clinic learns from the difference between the two. See planned ml vs. ml used and ml by area: ranges in planning.

What makes the range go up or down?

Six variables show up in almost every case:

1. Number of areas. More areas in the session add time, swelling and complexity.
2. Type of area. Areas with more support (cheekbone, jaw) tend to get more; detail areas (lips, under-eye, nasolabial fold), less.
3. Facial type. A lean face with thin skin tends to call for more caution with each ml. See volume by facial type in planning.
4. Product chosen. Different products behave differently; the choice is clinical.
5. Vascular risk of the areas. High-risk areas call for their own planning and often more conservative volumes.
6. Patient tolerance and schedule. An upcoming event, work and tolerance for swelling weigh on the decision.

No row is a rule: it is a list of questions. See also when to split the volume across sessions and conservative volume in the first session.

What do Harmy's shortcuts illustrate?

Harmy's marking shortcuts show three orders of magnitude of plans, only as examples of how to use the tool. "First time" marks lips 1 ml at Moderate and under-eye 1 ml at Subtle (2 ml in total). "Maintenance" marks lips 0.5 ml at Subtle, nasolabial fold 1 ml at Subtle and cheekbone 1 ml at Subtle (2.5 ml in total). "Full harmonization" marks cheekbone 2 ml, jaw 2 ml, chin 1.5 ml, lips 1 ml and nasolabial fold 1 ml at Moderate, plus under-eye 1 ml at Subtle (8.5 ml in total).

These values exist to speed up marking and the conversation, and you adjust them before creating the projection. The ml for each area ranges from 0.5 to 5 ml, in steps of 0.5, and for bilateral areas the value entered is the total, split between the two sides. No shortcut is a clinical dose indication.

Why are smaller sessions usually easier to follow?

Because reading the response is cleaner. With few areas, the professional can attribute changes and reactions to a specific area. With many, the causes get mixed. In case of a complication, knowing exactly where and how much was placed speeds up management. In addition, smaller sessions tend to be better tolerated, with less accumulated swelling and less fatigue for the patient and the team.

There is also the aesthetic argument. Each treated area changes how the neighboring ones read, and you can only know how much is missing after seeing the face respond. That is why many plans split the path into two or three stages. See HOF plan in two sessions, HOF plan in three sessions and how many areas to treat per day.

And the safety limit?

There is no universal number, and anyone who states a fixed limit for any patient is oversimplifying. What exists is the combination of clinical factors the professional assesses: anatomy, history, area, product, health status, tolerance. In a patient with a coagulopathy, anticoagulant use or a condition that raises risk, the plan changes more than with any range. The medical history is part of the calculation. See medical history in HOF and safety and complications, overview.

The team's ability to manage complications also counts. Hyaluronidase on hand, a known emergency protocol and a referral plan are part of what makes a larger session acceptable or not.

How to organize the plan around the ranges?

Recording the ml actually used is the basis of the clinic's learning. See recording plan deviations during the session and planning ml in syringe multiples.

What to tell the patient?

The line redirects the patient who arrives with a number someone told them. If they insist on comparing, go back to the exam and the simulation.

Checklist before closing the session volume

Quick review

Summary

Volume ranges per session are conversation frames, not targets or protocols. They go up or down with areas, facial type, product, risk and tolerance, and are revised after the exam. Prefer sessions with few areas, record the ml used, respect vascular risk and use Harmy as a simulation aid, knowing that it does not define a dose limit.