Reiki in the ICU: Reading a Sham-Controlled Trial

Reiki being studied in an intensive care unit — on patients who cannot speak, attached to breathing machines — sounds like an unlikely research setting. Yet that is exactly what a 2026 trial did, with a sham-controlled design more careful than most Reiki studies manage. This is a plain reading of what the trial found, where its limits sit, and what an ICU study can and cannot tell us about the practice.

The study, by Yasemin Karacan and colleagues, was published in 2026 in the Journal of Integrative and Complementary Medicine under the title "Effect of Reiki on Pain, Anxiety, and Hemodynamic Parameters in Mechanically Ventilated Patients." Sixty adult ICU patients on invasive mechanical ventilation were randomly assigned to receive either a 30-minute Reiki session from a practitioner or a 30-minute sham session from a non-certified person imitating the hand positions with no healing intent. Pain was measured with an observational tool designed for patients who cannot self-report, alongside anxiety scores and vital signs such as blood pressure and heart rate. Below, I go through the findings, the cautions, and my own take as someone who teaches in the traditional Usui stream.

Part 1: What the Source Says

Key Points

Sixty mechanically ventilated ICU patients were randomized into two equal groups: real Reiki (30 minutes, by a practitioner) or sham Reiki (30 minutes, by a non-certified person with no energy-transmission intent).
The design was single-blind and placebo-controlled — only one side of the study was blinded, and the practitioners obviously knew which session they were giving.
The primary outcome was pain, measured with the Critical-Care Pain Observation Tool (CPOT), an observational scale for patients who cannot speak; secondary outcomes included anxiety, blood pressure, heart rate, and respiratory rate.
The authors conclude that Reiki "may reduce" pain, anxiety, and physiological stress responses in these patients — with the clearest signals in diastolic blood pressure and heart rate, and weaker effects on systolic pressure and respiratory rate.
The cautious wording is the authors' own: this is presented as a suggestive result in a small sample, not a demonstration of treatment effect.

Part 2: What It Does — and Doesn't — Show

The design deserves credit before the caveats. A sham arm — someone imitating the hand positions without training or intent — is exactly the control Reiki studies are most often criticized for lacking, and an observational pain tool sidesteps the usual problem of self-reported outcomes flattering the therapy. Within its design, the study found measurable differences favoring the Reiki group on some physiological measures.

Now the honest limits. Sixty patients is small, and split across two groups, smaller still. Single-blind means the person delivering the session knew which arm it was, and subtle differences in touch or presence cannot be ruled out as the active ingredient. The effects were mixed — clearer on some vital signs than others — which is what chance variation also tends to look like in small samples. And "may reduce" is doing real work in that conclusion: this is one trial, in one unit, awaiting replication. What the study does show, unambiguously, is that Reiki can be studied rigorously in even the most demanding clinical settings — and that when it is, the results are interesting enough to publish, not dramatic enough to settle anything.

Related: Yawning and Shivers: The Body Signs You're Receiving Reiki explains this in detail.

Part 3: A Grounded Practitioner's Take

What moves me about this study is not the blood-pressure numbers. It is the setting. An ICU patient on a ventilator cannot chat with a practitioner, cannot expect anything, cannot perform politeness. Whatever happened in those thirty minutes happened to people stripped of nearly every channel through which placebo stories usually travel. I hold that thought loosely — sedated patients still register presence, and small trials mislead — but it is a setting worth noticing.

As a teacher, I also notice the shape of the intervention: thirty quiet minutes, hands, attention, no claims. That is Reiki at its most honest — offered as comfort alongside full medical care, never instead of it, measured by people who were free to find nothing. My conviction about this practice never came from trials; it came from my own life slowly reorganizing itself over twenty years. But I welcome every carefully controlled study, whatever it finds, because a practice that only survives in the absence of scrutiny would not be worth teaching.

FAQ

Q: Does this trial prove Reiki works? A: No. It is a small, single-blind trial whose authors themselves say "may reduce." It adds a carefully designed data point — with a sham control and observational measures — to a research picture that remains genuinely unsettled.

Q: Why does a sham control matter so much? A: Because most Reiki studies compare Reiki to nothing, which cannot separate the practice from attention, touch, and expectation. A sham arm holds those constant. Trials with this design carry far more weight, in either direction, than wait-list comparisons.

Q: Should families request Reiki for ICU patients? A: Only within the hospital's own integrative-care framework, where it exists, and always alongside — never instead of — the medical team's care. Reiki in a hospital is a comfort measure, offered with consent and no medical claims. That is the only form of it I would ever endorse.

The Bottom Line

A sham-controlled ICU trial found modest, mixed signals favoring Reiki on pain and some vital signs in ventilated patients — reported cautiously by its own authors, and deserving the same caution from us. Read plainly, it neither vindicates nor embarrasses the practice. It shows Reiki holding its own under serious scrutiny in a serious place, on the modest terms — quiet minutes, no promises — that the practice has always done its best work.