When medical resources are strained and staff shortages become the norm, does this justify crossing legal boundaries by allowing unqualified personnel to conduct electrocardiogram (ECG) tests under physician supervision? The answer is unequivocally negative. This matter transcends legal technicalities—it's fundamentally about patient safety. This article examines the legal risks of unqualified personnel performing ECG tests and how medical institutions should balance patient rights with regulatory compliance.

ECG testing constitutes a formal medical practice strictly regulated by law. Japan's Medical Practitioners' Act Article 17 explicitly states that "non-physicians shall not practice medicine." This means only licensed physicians may perform medical procedures including ECG tests, unless specifically exempted by law.

The law does provide limited exceptions. Under physician supervision, certain certified professionals—including nurses, radiologists, and clinical laboratory technicians—may perform medical procedures within their defined scope of practice. Nurses in particular have seen their authorized responsibilities gradually expand, but even then must operate within strict legal parameters.

While Japan's Clinical Laboratory Technicians Act permits qualified technicians to perform ECG tests under physician guidance, this authorization doesn't extend to untrained personnel. Misinterpreting these regulations as blanket permission for any staff member to conduct medical procedures constitutes both legal negligence and a threat to patient safety.

Historical cases demonstrate the judiciary's firm stance on this issue. In previous incidents involving unqualified personnel performing optometric examinations, courts convicted defendants under Articles 17 and 31 of the Medical Practitioners' Act. Judicial rulings have consistently defined medical practice as "any activity which, if performed by non-physicians, could endanger public health"—establishing an absolute legal barrier against unauthorized medical procedures.

Supreme Court decisions have reinforced this principle. In one notable case, two defendants received suspended prison sentences, demonstrating zero tolerance for unauthorized medical practice.

The Fujisawa Maternity Hospital incident serves as a sobering example. The hospital director (a physician) instructed three unqualified individuals—including the hospital chairman (his spouse)—to perform 212 ultrasound examinations on 134 patients. Additionally, unqualified secretaries were directed to suture during laparotomies and conduct 16 ECG tests on 13 patients. The court convicted the director for violating multiple laws including the Nurses Act, Penal Code, and Clinical Laboratory Technicians Act, while the unqualified chairman faced prosecution under the Medical Practitioners' Act.

These cases establish that physicians cannot arbitrarily delegate medical procedures to unqualified staff—doing so risks legal consequences for both the supervising physician and the unauthorized practitioner.

While healthcare institutions face genuine staffing challenges, allowing untrained personnel to perform ECG tests—even as a stopgap measure—cannot override legal obligations. Patient safety must remain paramount, and legal boundaries cannot be compromised.

Legal frameworks may evolve with healthcare demands. Future regulations might permit limited exceptions for non-certified personnel to perform medical procedures, but would undoubtedly impose rigorous conditions—including comprehensive training programs and strict competency assessments.

Only through standardized training can institutions ensure personnel possess sufficient expertise to minimize medical risks. Any special permissions would require robust oversight mechanisms to guarantee procedures are performed correctly under physician supervision.

Unauthorized ECG testing remains unequivocally illegal. Healthcare institutions must strengthen compliance measures while society addresses systemic staffing challenges—only through this dual approach can we ensure patient safety and advance public health objectives.