The clinicians each used a pressure algometer along with patient feedback to document the sensitivity of each suspected TrP site, however unlike routine clinical practice, the algometry was performed with a double-blinded approach hence the results were only examined post-hoc.
PPTs were measured using a pressure algometer.
Pressure allodynia (PA) was tested by using a pressure algometer in five bilateral skin areas on the head and neck (forehead V1, temple, parietal area, posterior neck/C2, shoulder/trapezius) (Fig. 1).
Blunt pressure stimuli were applied using a pressure algometer with a circular and flat probe of 1 cm diameter (Commander Algometer, JTECH Medical, Midvale, Utah, USA; maximum pressure 111.6 N/cm2).
Blunt pressure was exerted perpendicularly onto the dorsal side of mid-phalanx of the right middle finger using a pressure algometer with a circular and flat probe of 1 cm diameter (JTECH Medical, Midvale, USA).
Pressure pain thresholds (PPTs) were measured using a pressure algometer (Somedic AB, Farsta, Sweden).
Electronic testing using a pressure algometer checks for a patient's ability to endure pain if PPtt is determined.
Pressure pain thresholds (PPT) were measured using a pressure algometer (FDK20, Wagner Instruments, Greenwich, CT, USA) with a range between 2 and 20 kg.
PPT values were obtained every 5 10 s over the tender spot using a pressure algometer and PPT was measured 6 times.
Pressure pain thresholds, which are a measure of pain sensitivity, are measured on the volar forearm before surgery, on discharge from hospital, and 12-month post-operative using a pressure algometer (Somedic, Sweden).
