Clinical trial NCT02226016: Levator Muscle Strength Evaluation
Official title: Quantitative Evaluation of Levator Palpebra Muscle Strength
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Ptosis
Keywords: ptosis
blepharochalasis
dermatochalasis
Lead sponsor: Meir Medical Center
Sponsor class: OTHER
First posted: 2014-08-26
Enrollment: 50
Sex: ALL
Minimum age (years): 21
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: DIAGNOSTIC

Brief summary: The purpose of this study is to assess a new technique of measurement for the levator muscle.

this measurement may be applied during a clinical evaluation of eyelid malposition.

our purpose is to quantify the levator muscle strength and to corelate it to standard levator muscle strength assessment techniques routinley used in the oculoplastic clinic.

Detailed description: This study will include patients refered to our oculoplastic department for evaluation of eyelid disorders (ptosis or eyelid malpositions due to various mechanical, muscular, neurogenic factors).

all patients will be over 21 years old, with eligibility for signing an informed concent form.

all patients will undergo a full clinical standard evaluation of eyelid malposition made as part of the routine evaluation of eyelid malpositions. as part of this evaluation- the levator muscles strength will be measured by monitoring the amount of millimeters of difference between the uper lid closed and open position (a regular technique for levator muscles assessment).

a second levator muscle strength evaluation will include the study device. this device is used for weight evaluation of objects. an object is measured by attaching it to the device with a metal hook and a string. the device is hand held.

for measurements of the upper lid force the device will be temporarily attached to the upper eyelid using a specially designed base made in the shape of the eyelid. the attachment will be using a sterile medical tape (plaster). this sterile base is attached to the outer eyelid and does not involve in any point any harm to the continuity of the skin, injections , harm or contact to the eyeball or any other parts of the eye. this base is attached from its back to a string witch attaches to the measuring device. the investigator holds the measuring device and asks the patient to open and close his eyes. the force that is generated while opening the upper lid is measured (in grams) by the device.

this evaluation will allow a unique first proper estimation of the true levator palpebra strength. it will be compared to the levators' strength as estimated using the routine techniques for assessing their efficacy.

the assessment will be made one time for each patient. after the measurement- the sterile tape will be removed and will be disposed. no further interventions will be made for each patient.

Eligibility criteria: Inclusion Criteria:

eligible for signing an informed concent form refered for eyelid evaluation in the oculoplastic department, Meir Mc

Exclusion Criteria:

previous eyelid surgery

Primary outcomes:
measure: levator muscle strength quantified in grams using a unique measuring device.
timeFrame: each patient will undergo two measurments of the levator muscle strength using the study device during a single clinical evaluation. no further evaluations will be made for the same patient throughout the study.
Secondary outcomes:
measure: repeatability of the measurements
timeFrame: each patient will undergo two measurments of the levator muscle strength using the study device during a single clinical evaluation. no further evaluations will be made for the same patient throughout the study.
Other outcomes:
Locations:
city: Kfar Saba
country: Israel
facility: Meir Medical center
Study officials:
affiliation: Meir Medical Center
name: Arik Nemet, Dr
role: PRINCIPAL_INVESTIGATOR
References: