Hemodynamic Changes Associated With Transcervical Laryngeal Injection of Botulinum Toxin.
Brian O Hernandez, Moeko Nagatsuka, Stephen Carter Wright and 4 others
PMID 33541763WHAT IT FOUND
Heart rate and blood pressure rise significantly during office-based botulinum toxin injections for spasmodic dysphonia.
Oxygen levels remain stable and no major cardiovascular events occurred. Monitor vitals, especially in patients with baseline hypertension.
Key findings
01Statistically significant increases in mean heart rate, systolic blood pressure, and diastolic blood pressure were noted during the injection procedure.
02There was no statistically significant difference in oxygen saturation during the procedure.
03No patients faced major adverse outcomes including cardiovascular events, though one experienced self-resolving laryngospasm and another reported lightheadedness.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
Only two manual vital sign measures were collected (pre-procedure and during injection), resulting in a limited data set. There was no defined control group of individuals not undergoing the procedure. Patients had a wide range of prior injections, which may affect tolerance and hemodynamic response. The clinical significance of the observed vital sign changes is unknown. A small number of patients developed tachycardia or severe hypertension, but the study was not powered to determine long-term risk.
Declared interests
The funding and conflicts of interest section is present but contains no text in the provided source.
The easy way to misread this
Do not interpret the statistically significant increases in heart rate and blood pressure as evidence of clinical danger. The paper reports no major adverse cardiovascular events, and the authors note that the clinical significance of these small changes remains unknown.