Measuring Lingual Range of Motion

For so long, we have focused on lingual strength and range-of-motion.

The Iowa Oral Performance Instrument (IOPI),  the SwallowStrong and the Tongue Press have all been developed to give us visual and numeric strength measurements of the tongue.

We finally have a measurement scale for lingual range of motion.

C.L. Lazarus, H. Husaini, A.S. Jacobson, J.K. Mojica, D. Buchbinder, K. Okay, M.L. Urken.  Development of a New Lingual Range-of-Motion Assessment Scale, Normative Data in Surgically Treated Oral Cancer Patients.  Dysphagia (2014) 29:489-499.

This study compared results in treated surgical patients vs. healthy patients.   36 patients s/p oral tongue surgery with significantly decreased tongue range-of-motion and 31 healthy individuals.

The scale was validated by correlating range-of-motion with performance status, oral outcomes and patient-related Quality of Life.

The scale was made to define lingual deficits.  This is a tool that can be used for baseline and post surgery tongue range-of-motion and to track changes over time with recovery and therapy.

Lingual protrusion was measured using the Therabite jaw range-of-motion measurement discs.

Protrusion Scores:  (100) Normal:  > or = 15 mm past the upper lip margin

(50)   Mild-mod:  >1mm but <15mm pasat the upper lip margin

(25)   Severe:  Some movement but unable to reach upper lip margin

(0)     Total:  No movement

Lateralization Scores:  based on ability of the tongue to touch the commissures of the mouth.  Measure both right and left side.
(100)  Normal:                      able to fully touch the corner of the mouth.
(50)    Mild-Moderate:  50% reduction of movement to corner of the mouth                                                in either direction.
(25)    Severe:  >50%           reduction in movement.
(0)      Total:                          No movement.

Elevation Scores:    

(100)  Normal:  complete tongue tip contact with the upper alvoelar                                       ridge.
(50)    Moderate:  tongue tip elevation but no contact with the upper                                       alvoelar ridge.
(0)      Severe:  No visible tongue tip elevation

Total Scores were assigned by adding the protrusion score+ right lateralization score + left lateralization score + elevation score divided by 4.

Scores were 0-100:      

0=severely impaired/totally impaired
25=Severly impaired
50=mild-moderate impairment

During this study, tongue strength was measured using the Iowa Oral Performance Instrument.

Jaw range-of-motion was measure using the Therabite jaw range-of-motion measurement discs.

Saliva flow was measured using the Saxon test where the patient was asked to chew a sterile 4×4 piece of gauze for 2 minutes then spit the gauze in a cup.  The gauze was weighed before and after mastication.

The Performance Status Scale was used to determine diet type, speech uderstandability, impact of surgery on ability to eat socially.

Quality of Life was measured using the Eating Assessment Tool-10 (EAT-10), MD Anderson Dysphagia Inventory (MDADI) and Speech Handicap Index (SHI).

The study found that lingual range-of-motion can negatively affect all aspects of a patient’s life and correlates with performance and quality of life.

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