The stapes is known in several non-mammaliaform cynodonts, although it has only been cursorily studied. Here we thoroughly analyze the stapedial anatomy of several basal cynodonts in a phylogenetic framework. Our study shows that the stapedial anatomy is more variable than previously thought. The morphological variation of the stapes led to the recognition of 11 phylogenetic characters that wer...

OBJECTIVE To determine the long-term effects of ventilation tube insertion on hearing thresholds and tympanic membrane pathologic abnormalities in children with otitis media with effusion. DESIGN Prospective cohort study. SETTING Tertiary care children's hospital, otorhinolaryngology and audiology service. PARTICIPANTS Patients aged 8 to 16 years who participated in a randomized controlle...

Background. Tympanic membrane perforation may occur when ear pressures are excessive, including valsalva maneuver associated with active labor and vaginal delivery. A pressure differential across the eardrum of about 5 psi can cause rupture; the increased intraabdominal pressure spikes repeatedly manifested by "pushing" during second-stage labor easily approach (and may exceed) this level. Mate...

PURPOSE To determine the rate of persistent tympanic membrane perforation after intratympanic steroid injection. To determine which comorbid conditions and risk factors are associated with prolonged time to perforation closure following intratympanic steroid injection. MATERIALS AND METHODS Clinical data were gathered for patients who had undergone intratympanic steroid injection to treat sud...

Tympanic membrane is the partition between external ear and middle layer which a vital component of human ear. Neglected or maltreated earache, discharge trauma lead to perforation tympanic membrane. Tympanoplasty surgical procedure performed repair perforated membrane, with/without reconstruction ossicles, with aim preventing reinfection restoring hearing ability. Type 1 tympanoplasty simple c...

INTRODUCTION In the last decade, there has been an increasing use of cartilage grafts in the primary repair of tympanic membrane perforations. The major advantages of cartilage are its stiffness and its very low metabolic requirements, which make it particularly suitable for difficult conditions, such as subtotal perforations, adhesive otitis and reoperation. OBJECTIVE To analyze the impact o...

INTRODUCTION Tympanoplasty is the standard and well established procedure for closure of tympanic membrane perforations .This paper compares the results of tympanoplasty in terms of hearing improvement and graft incorporation in patients with chronic perforation of the tympanic membrane between two groups with and without active drainage at the time of surgery. MATERIALS AND METHODS Sixty ref...

Ear is the most pressure sensitive organ of the body and is susceptible for rupture with altered pressure. Tympanic membrane (TM) perforation reduces the total ratio of surface area, allowing the sound waves to directly pass through the middle ear. However, implications of the tympanic membrane perforation on sound transmission in the middle ear is not well characterised. The study was undertak...

BACKGROUND Tympanic membrane perforation is the most common primary blast injury in the current conflicts and occurs in approximately one tenth of service members wounded by combat explosions. We wanted to determine the severity of perforation and its effect on hearing and combat readiness. METHODS This analysis is a retrospective study of US service members injured in combat explosions in Af...