Inner Ear Fluid Space Dimensions

Entire Inner Ear

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 204.5 ul Human Igarashi, M., Ohashi, K., Oshii, M. (1986) Acta Otolaryngol 101, 161-164 Average of 5 specimens
Volume 227.8 ul
SD 24.4, n=46		 Human Melhem, ER, et al., (1998) Am. J. Neuroradiol. 19, 1819 MR imaging of 23 volunteers, volume is of entire ear and may include soft tissues
Volume 192.5 ul Human Buckingham, R.A. and Valvassori, G.E. (2001) Ann Otol Rhinol Laryngol 110, 113-117
Volume 20.9 ul Guinea pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98

Entire Endolymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 38.1 ul Human Igarashi, M., Ohashi, K., Oshii, M. (1986) Acta Otolaryngol 101, 161-164 Average of 5 specimens
Volume 34 ul Human Buckingham, R.A. and Valvassori, G.E. (2001) Ann Otol Rhinol Laryngol 110, 113-117
Volume 4.69 ul Guinea Pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98

Entire Perilymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 166.4 ul Human Igarashi, M., Ohashi, K., Oshii, M. (1986) Acta Otolaryngol 101, 161-164 Average of 5 specimens
Volume 158.5 ul Human Buckingham, R.A. and Valvassori, G.E. (2001) Ann Otol Rhinol Laryngol 110, 113-117
Volume 15.94 ul Guinea Pig Shinomori, Y., Spack, D.S., Jones, D.D., Kimura, R.S. (2001) Ann Otol Rhinol Laryngol 110, 91-98

Cochlear Perilymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 8.65 ul Guinea Pig Thorne et al., (1999) Laryngoscope, 109, 1661-1668
Volume 8.87 ul Guinea Pig Shinomori, Y., Spack, D.S., Jones, D.D., Kimura, R.S. (2001) Ann Otol Rhinol Laryngol 110, 91-98

Vestibular Perilymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 7.01 ul Guinea Pig Shinomori, Y., Spack, D.S., Jones, D.D., Kimura, R.S. (2001) Ann Otol Rhinol Laryngol 110, 91-98
Volume 5.1 ul Chinchilla Plontke et al., (2002) Otology & Neurotology 23,967-974

Scala Tympani

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 44.3 ul Human Igarashi, M., Ohashi, K., Oshii, M. (1986) Acta Otolaryngol 101, 161-164 Average of 5 specimens
Volume 29.2 ul
Length 28.46 mm		 Human Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 4.66 ul Guinea pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98
Volume 4.76 ul
Length 16.24 mm		 Guinea pig Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 7.42 ul
Length 12.8 mm		 Chinchilla Plontke et al., (2002) Otology & Neurotology 23,967-974
Volume 1.76 ul
Length 13.49 mm		 Bat (Rhinolophus rouxi) Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 1.04 ul
Length 7.24 mm		 Rat Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 1.10 ul
Length 9.20 mm		 Gerbil Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 0.32 ul
Length 4.55 mm		 Mouse Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website

Round Window

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Area 2.29 mm2 Human Okuno H. and Sando, I (1988)
Acta Otolaryngol. 106: 55
Area 2.14 mm2 Human Su et al.(1982)
Laryngoscope 92: 483
Area 1.02 mm2 Guinea Pig Fernandez, C.(1952)
J. Acoust. Soc. Amer. 24: 519
Area 1.18 mm2 Guinea Pig Ghiz, et al., (2001) Hear. Res. 162, 105-112
Area 2.33 mm2 Chinchilla Plontke et al., (2002) Otology & Neurotology 23,967-974

Cochlear Aqueduct

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Length 6 - 12 mm Human References cited in
Gopen Q. et al.
Hearing Res 107: 9
Diameter at narrowest
region 138 um		 Human Gopen Q. et al.
Hearing Res 107: 9
Length 2 mm
Volume 0.08 to 0.14		 Guinea Pig Ghiz, et al., (2001) Hear. Res. 162, 105-112

Scala Vestibuli

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 31.5 ul Human Igarashi, M., Ohashi, K., Oshii, M. (1986) Acta Otolaryngol 101, 161-164 Average of 5 specimens
Volume 7.543 ul Guinea pig Shinomori et al., 1999,
ARO Abstracts 22:76		 Includes perilymphatic cistern in vestibule anterior to the membrana limitans
Volume 3.89 ul
Length 15.55 mm		 Guinea pig Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 7.67 ul
Length 14.3 mm		 Chinchilla Plontke et al., (2002) Otology & Neurotology 23,967-974
Volume 1.30 ul
Length 13.30 mm		 Bat (Rhinolophus rouxi) Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 1.59 ul
Length 6.32 mm		 Rat Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 1.68 ul
Length 8.08 mm		 Gerbil Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 0.30 ul
Length 3.98 mm		 Mouse Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website

Cochlear Endolymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 7.7 ul Human Igarashi, M., Ohashi, K., Oshii, M. (1986) Acta Otolaryngol 101, 161-164 Average of 5 specimens
Volume 1.50 ul Guinea pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98
Volume 1.20 ul
Length 21.79 mm		 Guinea pig Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 3.59 ul
Length 22.7 mm		 Chinchilla Plontke et al., (2002) Otology & Neurotology 23,967-974
Volume 1.16 ul
Length 17.88 mm		 Bat (Rhinolophus rouxi) Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 0.39 ul
Length 10.42 mm		 Rat Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 0.38 ul
Length 12.04 mm		 Gerbil Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website
Volume 0.19 ul
Length 6.72 mm		 Mouse Thorne et al., (1999) Laryngoscope, 109, 1661-1668 More detail available on this website

Vestibular Endolymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 3.09 ul Guinea pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98

Ductus Reuniens

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Length 0.33 mm
Diameter 0.2 mm		 Guinea pig Misrahy, G.A et al.,(1958)
Amercan J. Physiol 194(2):396

Saccular Endolymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 0.38 ul Guinea pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98 Includes volume of ductus reuniens

Utricular Endolymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 0.86 ul Guinea pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98

Semi-Circular Canal Endolymph

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 0.67 ul Guinea pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98

Endolymphatic Sac

Value

Species

Source

Comment
------------------------ ---------------------- ------------------------------------ ---------------------
Volume 0.10 ul Guinea pig Shinomori, Y., et al.(2001) Ann Otol Rhinol Laryngol 110, 91-98 volume of lumen, including endolymphatic duct
Volume 0.17 ul Guinea pig Pettit et al., (2002) Hear. Res. 174, 1-8 volume of lumen
Volume 0.0059 ul
SD 0.0037, n=3		 Mouse Jansson, et al., 1992,
ORL 54:201