Summary: In a prospective randomised trial in secondary hyperparathyroidism, an improved ultrasound-guided radiofrequency ablation protocol using hydrodissection, a short electrode, low power, and intra-nodular ablation achieved higher clinical success and markedly less recurrent laryngeal nerve injury than the conventional technique.
PICO Summary
| Element | Detail |
|---|---|
| Population | 103 patients with secondary hyperparathyroidism (mean age 50.8; 49 male), mostly from chronic kidney disease; prospective randomised trial, China. |
| Intervention | Improved RFA protocol: parathyroidal circumferential hydrodissection, short electrode, low-power settings, and intra-nodular ablation (n=53). |
| Comparison | Conventional ultrasound-guided RFA without these modifications (n=50). |
| Outcome | The improved protocol had a higher clinical success rate (94.97% vs 89.07%; p<0.05), lower recurrent-laryngeal-nerve hoarseness (5.7% vs 18%; p<0.05), and faster hoarseness recovery (1.63 vs 2.75 months; p<0.05). Hydrodissection was performed successfully in all participants. |
Improved vs conventional RFA in SHPT
RCT · secondary hyperparathyroidism
The refined RFA protocol raised clinical success and cut recurrent laryngeal nerve hoarseness roughly three-fold versus conventional ablation, with faster voice recovery.
Expert Commentary
This is a practical, technically focused trial addressing the central tension of parathyroid ablation, namely achieving complete gland destruction while sparing the recurrent laryngeal nerve that runs perilously close in the tracheoesophageal groove. The modifications are mechanistically sensible and borrowed intelligently from thyroid ablation experience: hydrodissection creates a protective fluid buffer and improves visualisation, while a short electrode, lower power, and intra-nodular ablation limit thermal spread. The results are coherent and clinically meaningful, with both higher success and a roughly three-fold reduction in voice complications, and the faster recovery when hoarseness did occur suggests milder thermal stunning rather than substantial nerve damage. The honest caveats, which the post itself notes, are important: this is a single-centre study, the conventional comparator may reflect an earlier learning-curve period introducing temporal bias, operator experience was not controlled, and long-term PTH control and recurrence were not detailed here. Can I use this with my patients? As procedural best-practice guidance rather than a change in indication. For centres offering RFA in refractory secondary hyperparathyroidism, particularly for patients at high surgical risk, these refinements look like sound technique to adopt, while parathyroidectomy remains the established standard and confirmation in multicentre studies is still needed.
References
Qiu Y, Zhang D, Chen S, Yang J, Hong Z, Wu SS. A novel strategy for optimizing safety and efficacy in ultrasound-guided radiofrequency ablation for secondary hyperparathyroidism: a prospective study. Int J Hyperthermia. 2025;42(1):2591705. doi:10.1080/02656736.2025.2591705