Sometimes the Patient's Voice Is Part of the Safety System: What to Know About Sedation for PRP and Bone Marrow Concentrate Procedures
- cassis101
- 22 hours ago
- 6 min read
By Deborah Westergaard, M.D. Dallas | Regen Experts Dallas & Plano
What to Know About Sedation for PRP and Bone Marrow Concentrate Procedures
You have probably had the experience of describing something about your own body and watching it get filed away as background noise.
Something aches. You mention it. You get told it is arthritis, it is age, it is what happens. Somewhere in there, the thing you actually said stops being information and starts being a complaint.
I think about that a lot, because in my procedure room your voice is not background noise. It is a monitor.
The Problem: Comfort and Safety Get Treated as a Trade-off
Most people considering an orthobiologic procedure arrive with two questions and only ask one of them out loud.
The one they ask: will this hurt?
The one they do not ask: am I going to be awake for it, and is that better or worse?
It is a reasonable thing to wonder about, and the answers you find are not consistent. Some practices do these procedures with nothing but local anesthetic. Some put people all the way under. Ask three physicians and you may get three confident and completely different answers.
That inconsistency is not a sign that nobody knows what they are doing. It is a sign that the question is genuinely more complicated than a yes or no.
But it leaves patients in an uncomfortable position. If you are told you must be fully asleep, you may wonder what you are giving up. If you are told you must be fully awake, you may wonder whether you are simply expected to endure something.
Neither of those is the actual choice.
The Solution: Sedation for PRP and Bone Marrow Concentrate Procedures Is a Question of Depth, Not Whether
I spent fourteen years practicing anesthesiology before I moved into pain medicine spine and joint and then regenerative orthopedics. So I came to this question from the anesthesia side first.
Early in my pain training, Dr. Gabor Racz taught me something I have never forgotten. When you are working near the spine, do not make the patient so deep that they cannot tell you what they are feeling.
That principle has real limits, and I want to be honest about them. A patient reporting a sensation is not a reliable alarm. Nerve injuries have occurred in people who were wide awake. So I would never tell you that staying awake makes a procedure safe.
But removing your ability to speak does not replace that input with something better. It just removes it.
The question was never whether to use sedation. It was how deep, for what, and with what watching.
What I Actually Do
For many procedures, I use carefully titrated light-to-moderate IV sedation when it is appropriate. Not because everyone needs it. Most people do not.
Bone marrow harvest, intraosseous work, and some more extensive PRP procedures can be stimulating. And many of the women and men I treat arrive having already been through years of pain and a series of procedures they remember as unpleasant.
I do not think anyone earns extra credit for gritting their way through another one.
What I am aiming for is three things at the same time. Comfortable enough that the procedure is tolerable. Awake enough that I can talk with you and you can answer. Monitored closely enough that any change is caught the moment it happens.
What Monitoring Actually Means
An ACLS-certified nurse. Continuous monitoring, including end-tidal carbon dioxide. I direct the sedation myself rather than handing it off, and I talk with you throughout.
The carbon dioxide monitor is the part worth understanding, because it is the part most people have never heard of.
A pulse oximeter, the clip on your finger, measures oxygen in your blood. It is useful, but it is slow. Capnography measures the air you breathe out, breath by breath. If your breathing becomes ineffective, the capnography waveform changes roughly thirty to sixty seconds before your oxygen level falls. If you are receiving supplemental oxygen, which most sedated patients are, that gap gets wider still.
Thirty to sixty seconds is the difference between repositioning your chin and having a real problem.
On the Medication I Do Not Use
I do not use propofol. Any sedative given in a sufficient dose becomes a general anesthetic, but propofol travels that continuum quickly and has no reversal agent. In an outpatient setting, that is not my preference.
Other physicians use it safely every day. This is a judgment call, not a rule, and I would rather tell you it is a judgment call than dress it up as settled science.
On Nerve Blocks, and Why I Often Skip Them
Some colleagues combine sedation with nerve blocks. I use them selectively.
For knee intraosseous and bone augmentation procedures, I generally do not block other than local at the injection sites and the interosseous sites. Patients tolerate these well without one. And a dense motor block would sit directly in the middle of the window when I most want clean information. If you have weakness afterward, I want to know what that weakness means, rather than spending a day wondering whether it is a block wearing off or something I should be acting on.
Could I add one? Certainly. But every block carries its own risks, and I would rather not add a procedure to solve a problem my patients do not appear to be having.
Why Any of This Should Matter to You
Because the details are the medicine.
If you are researching regenerative options, you are almost certainly trying to answer one underlying question. Is this real, or am I being sold something?
That is the right question, and I would be suspicious of any physician who seemed annoyed by it.
The answer is not in the marketing. It is in whether the physician can tell you exactly what she is doing, why, where the evidence supports it, and where it does not. It is in whether she will tell you plainly when a procedure is not appropriate for you.
Some joints do need to be replaced. Some patients are not candidates for what I do. Saying so is part of the job, and it is the part that tells you the most about whether the rest can be trusted.
An Invitation
If you are somewhere between being told to live with it and being told to accept an irreversible operation, and no one has explained precisely which structures are generating your pain, that is a conversation worth having.
I would rather be asked than assume. If it would be useful, come and ask.
Deborah Westergaard, MD
Regen Experts
Spine and Joint
Dr. Deborah Westergaard provides physician-led, image-guided orthobiologic evaluations for patients in Dallas, North Dallas, Preston Center, Plano, McKinney, Frisco and surrounding areas
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Individual results vary. Orthobiologic procedures are not proven to regenerate all damaged tissue, prevent surgery in every case, or guarantee improvement in pain or function. Sedation carries risks that should be discussed individually. Recommendations should be based on an individualized medical evaluation.
Frequently Asked Questions
Are you asleep for PRP and bone marrow concentrate procedures?
Usually not fully asleep. Sedation for PRP and bone marrow concentrate procedures is most often light to moderate, meaning you are comfortable and relaxed but still able to respond and speak. Some procedures require no sedation at all. General anesthesia is not typically necessary for outpatient orthobiologic treatment.
Is bone marrow aspiration painful?
Bone marrow aspiration can be uncomfortable, which is why sedation is frequently offered for it. Local anesthetic is used at the site, and light-to-moderate IV sedation can be added when appropriate. Most patients describe pressure rather than sharp pain.
Why does the doctor want me awake ( but calm and comfortable) during a spine procedure?
Being able to describe what you feel provides information the physician cannot obtain any other way. It is not a substitute for imaging guidance or monitoring, and it does not by itself make a procedure safe, but removing your ability to communicate removes a source of information without replacing it.
What is capnography, and why does it matter during sedation?
Capnography continuously measures the carbon dioxide you exhale. It detects ineffective breathing roughly thirty to sixty seconds earlier than a pulse oximeter does, which allows a problem to be corrected before oxygen levels ever drop. It is a standard component of safe moderate sedation monitoring.
How long does recovery from sedation take?
Light-to-moderate IV sedation typically wears off within a few hours, though you will need someone to drive you home and should not make important decisions the same day. Recovery from the procedure itself is separate and depends on which structures were treated.
Do I need a nerve block for a knee orthobiologic procedure?
Often not. Many patients tolerate knee orthobiologic procedures well with local anesthetic and light sedation. Some physicians add nerve blocks; others avoid them so that post-procedure strength and sensation can be assessed accurately. This should be discussed individually.
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