JPH01107733A - Ocular hemomanometer - Google Patents
Ocular hemomanometerInfo
- Publication number
- JPH01107733A JPH01107733A JP62264569A JP26456987A JPH01107733A JP H01107733 A JPH01107733 A JP H01107733A JP 62264569 A JP62264569 A JP 62264569A JP 26456987 A JP26456987 A JP 26456987A JP H01107733 A JPH01107733 A JP H01107733A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric crystal
- tonometer
- pressure
- crystal
- intraocular pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 210000004087 cornea Anatomy 0.000 claims abstract description 4
- 229910002113 barium titanate Inorganic materials 0.000 claims abstract description 3
- 230000004410 intraocular pressure Effects 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 claims 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000005611 electricity Effects 0.000 abstract description 3
- 229910003327 LiNbO3 Inorganic materials 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 abstract description 2
- 229910003781 PbTiO3 Inorganic materials 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- -1 Cds Inorganic materials 0.000 abstract 1
- 239000007836 KH2PO4 Substances 0.000 abstract 1
- 229910012463 LiTaO3 Inorganic materials 0.000 abstract 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 abstract 1
- 235000019796 monopotassium phosphate Nutrition 0.000 abstract 1
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 210000005252 bulbus oculi Anatomy 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 210000001508 eye Anatomy 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 208000002177 Cataract Diseases 0.000 description 1
- 208000010412 Glaucoma Diseases 0.000 description 1
- 210000002159 anterior chamber Anatomy 0.000 description 1
- 210000001742 aqueous humor Anatomy 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000313 electron-beam-induced deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000004493 normal intraocular pressure Effects 0.000 description 1
- 238000002559 palpation Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Eye Examination Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は正確でかつ簡易に眼圧を測定する事が出来る眼
圧計に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tonometer that can accurately and easily measure intraocular pressure.
眼圧検査法には器具を用いない触診法と器具を用いる方
法があり、器具を用いる方法として直接法と間接法とに
大別される。直接法とは前房内に針を刺入し、直接に眼
圧を測定する方法で、臨床的に用いることは出来ない。Intraocular pressure testing methods include a palpation method that does not use an instrument and a method that uses an instrument, and the method that uses an instrument is broadly classified into a direct method and an indirect method. The direct method involves inserting a needle into the anterior chamber and directly measuring intraocular pressure, and cannot be used clinically.
間接法には圧入眼圧測定法と圧平眼圧測定法があり、圧
入眼圧測定法は可動杆による角膜の０．０５ｍｍの陥入
が目盛板の１目盛の変化をもたらすよう設計されている
。Indirect methods include intrusion tonometry and applanation tonometry. The intrusion tonometry method is designed so that 0.05 mm of invagination of the cornea by a movable rod causes a change of one scale on the scale plate. There is.
本方式の欠点は眼球壁硬性の個人差も値として検出され
てしまうため、眼球壁硬性が正常の目についてのみ適用
される。圧平眼圧測定法はＧｏ’ｌｃ１ｍａｎｎ圧平眼
圧計で代表されるもので原理は角膜中央の一定面積を扁
平にするのに要する圧力から求められる。加圧は正常眼
圧で１〜２７とわずかで１０倍値で直読できるようにな
っており、この測定法では眼球変形が殆んどなく、眼球
壁硬性の影響は無視できる。しかしながら、正しい値を
知るためには５ＣｈｉＯｔＺの眼圧計の値を組合せて求
めるのが通例となっており、極めて煩わしいという欠点
がある。The drawback of this method is that individual differences in eyeball wall stiffness are also detected as values, so it is applied only to eyes with normal eyeball wall stiffness. The applanation tonometry method is typified by the Go'lcmann applanation tonometer, and its principle is determined from the pressure required to flatten a certain area at the center of the cornea. The pressure is as small as 1 to 27 under normal intraocular pressure, and can be directly read as a 10-fold value.With this measurement method, there is almost no deformation of the eyeball, and the influence of eyeball wall stiffness can be ignored. However, in order to find the correct value, it is customary to combine the values of the 5ChiOtZ tonometers, which has the drawback of being extremely troublesome.
以上のように、従来の技術では操作性や正確さ、読み取
シの熟練度に左右される欠点を有している。As described above, the conventional techniques have drawbacks that depend on the operability, accuracy, and skill level of the reader.
本発明は、以上のような問題点を解決するもので、その
目的とするところは、簡単な操作でかつ正確で精密な眼
圧測定を行なう事にある。The present invention is intended to solve the above-mentioned problems, and its purpose is to perform accurate and precise intraocular pressure measurement with simple operation.
本願発明は、＋３０ｈｉｏｔ＋！＋眼圧計やＧｏｌｄｍ
ａｎｎ圧平眼圧計と測定原理と異にするものであり、そ
の基本原理は圧力−電気変換可能な圧電結晶をセンサー
として用いた特徴を有する。圧電結晶が外部から加えら
れる力に応じた起電力を生じる事は周知の事実である。The present invention is +30hiot+! + Tonometer and Goldm
The measurement principle is different from that of an ann applanation tonometer, and its basic principle is that a piezoelectric crystal capable of converting pressure to electricity is used as a sensor. It is a well-known fact that a piezoelectric crystal generates an electromotive force in response to an externally applied force.
我々はこの起電力と眼圧の関係につき調査研究を進めた
所、被検者に応じた、極めて再現性の高いデータが得ら
れる事が確認された。We have conducted research into the relationship between electromotive force and intraocular pressure, and have confirmed that data with extremely high reproducibility can be obtained depending on the subject.
眼圧値は一般化されている血圧値と同様に、身体全体の
健康状態をも知る事ができる重要な値である。又人口の
高年齢化に伴ない、緑内障や白内障の疾患が増加して来
ている。これらの事からも眼圧値の精密な測定値や、＄
ｃｈｉｏｔｚ眼圧計を用い眼圧下降してゆく割合を算出
し、眼房水の流れの状態を推測するｔｏｎｏｇｒａｐｈ
７などの経時に亘るデータも重要視されて来ている。The intraocular pressure value, like the generalized blood pressure value, is an important value that allows us to know the health status of the entire body. Furthermore, as the population ages, diseases such as glaucoma and cataracts are increasing. From these things, accurate measurements of intraocular pressure and $
Tonograph that uses a Chiotz tonometer to calculate the rate of decline in intraocular pressure and estimate the state of the flow of aqueous humor.
7 and other data over time are also gaining importance.
この様な時代の要請より、圧力を直接電気変換して眼圧
挙動を調査可能な信頼性の高い眼圧計が眼科医から強く
望まれている。本発明で用いられる圧電結晶とは、Ｚｎ
ａ、ＢａＴｉＯ３、ＫＥＥＰ０４ 、ＮＨ，Ｈ，ＰＯ
，、ＫＮｈＣ４Ｈ４０６−４Ｈ，Ｏ，ＳｉＯ，（水晶）
、ＬｉＮｂＯ３゜ＬｉＴａＯ３、ａａｓ、ｐｂ’ｒ１ｏ
８．ＰｂＺｒＯ３−ＰｂＴｉ Ｏ８，ＺｎＯの結晶又は
セラミック圧電体を用いる圧力センサーが利用できる。In response to the demands of the times, ophthalmologists have strongly desired a highly reliable tonometer that can directly convert pressure into electricity to investigate intraocular pressure behavior. The piezoelectric crystal used in the present invention is Zn
a, BaTiO3, KEEP04, NH,H,PO
,,KNhC4H406-4H,O,SiO, (crystal)
, LiNbO3゜LiTaO3, aas, pb'r1o
8. Pressure sensors using PbZrO3-PbTiO8, ZnO crystals or ceramic piezoelectric bodies are available.
実施例−１
ＢａＴｉＯ８の結晶板を用い、表裏面にＡｕをスパッタ
リング法で全面に施した。結晶板は５＋＋ｍφ、厚み（
ＬＯ５＋ｍを用いた。保護膜としてアクリルシートフィ
ルム（ＬＯ２ｍ厚をｔｒｖ接着剤で接着し誘電体の保護
を兼ねた。この誘電体の変位量を電気信号に変換し眼圧
を測定した。この時の電圧は増幅回路により拡大し信号
源とした。これらの起電力と現在用いられている眼圧計
による眼圧とをすべて個体について照合した。本実施例
によると、コンビエータシ瓢ミレーシ１ンにより角膜圧
平面の面積も少なく正確で、かつ再現性の極めて優れた
眼圧測定が可能となりた。又眼球壁硬性も、時々刻々と
変更する電気信号を圧力換算（眼内容積変動量）する事
により従来良く用いられて居る５ｃｈｉｏｔｚ眼圧計や
ＧＯ１ｄｍａｎｎ圧平眼圧計を併用する事なく測定が可
能と成った。Example 1 A BaTiO8 crystal plate was used, and Au was applied to the entire surface by sputtering on the front and back surfaces. The crystal plate is 5++mφ, thickness (
LO5+m was used. As a protective film, an acrylic sheet film (LO2m thick) was adhered with TRV adhesive to also protect the dielectric.The amount of displacement of this dielectric was converted into an electrical signal and the intraocular pressure was measured.The voltage at this time was measured by an amplifier circuit. It was enlarged and used as a signal source.These electromotive forces were compared with the intraocular pressure measured by a currently used tonometer for all individuals.According to this example, the area of the corneal pressure plane is small and accurate due to the combinator system. It has become possible to measure intraocular pressure with extremely high reproducibility.In addition, the eyeball wall stiffness can be measured using the conventionally commonly used 5chiotz method, which converts electrical signals that change from moment to moment into pressure (intraocular volume variation). Measurement is now possible without using a tonometer or a GO1dmann applanation tonometer.
実施例−２
ＫＨ，ＰＯ４結晶を実施例１と同様にＡｕをスパッタで
形成し、電極を取シ出した後に、保護膜としてＳ１０．
を電子ビーム、蒸着で５０ＯＡフーテイングした。その
後実施例−１と同様アクリルシートフィルムなσＶ接着
剤で貼付は圧力センサーとした。８１０．１４をコーテ
ィングした事により耐湿性が格段に向上し、実用上でも
問題はない物であった。Example 2 KH,PO4 crystals were formed by sputtering Au in the same manner as in Example 1, and after the electrodes were taken out, S10.
A 50OA footing was performed using electron beam and vapor deposition. Thereafter, as in Example 1, a pressure sensor was attached using an acrylic sheet film σV adhesive. By coating with 810.14, the moisture resistance was significantly improved, and there was no problem in practical use.
第１図は実施例−１で述べた眼圧計センサ一部の断面図
を示す。
１・・・・・・・・・圧電結晶
２・・・・・・・・・Ａｕ電極
３・・・・・・・・・プラスチックフィルム４・・・・
・・・・・増幅回路のブロック部５・・・・・・・・・
電圧計
６・・・・・・・・・リード線
第２図は実施例−１で使用した眼圧計の発生起電力とＧ
ｏｌｄｍａｎｎ眼王計の読み値眼圧人間の眼を用いて測
定した相関図を示す。FIG. 1 shows a cross-sectional view of a part of the tonometer sensor described in Example-1. 1...Piezoelectric crystal 2...Au electrode 3...Plastic film 4...
...Block section 5 of the amplifier circuit...
Voltmeter 6...Lead wire Figure 2 shows the electromotive force and G generated by the tonometer used in Example-1.
A correlation diagram of readings of an Oldmann ophthalmometer and intraocular pressure measured using human eyes is shown.
Claims (3)
晶で押圧し、生じた電気信号により、眼圧測定する事を
特徴とする眼圧計。(1) A tonometer characterized by pressing the center of the subject's cornea with a piezoelectric crystal provided with electrodes and measuring intraocular pressure using the generated electrical signals.
とを特徴とする特許請求の範囲第１項記載の眼圧計。(2) The tonometer according to claim 1, wherein the piezoelectric crystal is Rochelle salt having a protective film.
を特徴とする特許請求の範囲第１項記載の眼圧計。(3) The tonometer according to claim 1, wherein the piezoelectric crystal is made of barium titanate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62264569A JPH01107733A (en) | 1987-10-20 | 1987-10-20 | Ocular hemomanometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62264569A JPH01107733A (en) | 1987-10-20 | 1987-10-20 | Ocular hemomanometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01107733A true JPH01107733A (en) | 1989-04-25 |
Family
ID=17405112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62264569A Pending JPH01107733A (en) | 1987-10-20 | 1987-10-20 | Ocular hemomanometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01107733A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITUA20164269A1 (en) * | 2016-06-10 | 2017-12-10 | Iromed Group S R L | HEAD OF APPLANATION FOR A GOLDMANN APPLIATION TONOMETER AND ITS TONOMETER, METHOD OF MEASURING INTRAOCULAR PRESSURE AND METHOD OF MEASURING THE CORNIS ELASTICITY MODULE |
-
1987
- 1987-10-20 JP JP62264569A patent/JPH01107733A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITUA20164269A1 (en) * | 2016-06-10 | 2017-12-10 | Iromed Group S R L | HEAD OF APPLANATION FOR A GOLDMANN APPLIATION TONOMETER AND ITS TONOMETER, METHOD OF MEASURING INTRAOCULAR PRESSURE AND METHOD OF MEASURING THE CORNIS ELASTICITY MODULE |
| EP3260041A3 (en) * | 2016-06-10 | 2018-04-25 | Iromed Group S.r.l. | Applanation head for a goldmann applanation tonometer and related tonometer, method for measuring an intraocular pressure |
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