CN2852933Y - Detecting instrument for epidural space pressure - Google Patents
Detecting instrument for epidural space pressure Download PDFInfo
- Publication number
- CN2852933Y CN2852933Y CN 200520079315 CN200520079315U CN2852933Y CN 2852933 Y CN2852933 Y CN 2852933Y CN 200520079315 CN200520079315 CN 200520079315 CN 200520079315 U CN200520079315 U CN 200520079315U CN 2852933 Y CN2852933 Y CN 2852933Y
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- China
- Prior art keywords
- pressure
- epidural space
- needle body
- cavity
- detecting device
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a medical detection device, in particular to a detection device of the pressure in the epidural space, which is characterized in that: a needle body (3), an air pressure hole (1) in the pinhead of the needle body (3), and a hollow (2) within the needle body (3). A sealing ware (4) seals the posterior extremity of the needle body (3), and the pressure cavity (5) of the sealing ware (4) is connected with the hollow (2) and the air pressure hole (1). A pressure-sensitive element (6) is arranged within the pressure cavity (5), the pressure-sensitive element (6) is connected with a detection unit (8) through a fuse (7), and the detection unit (8) will display the pressure getting into hollow cavity through the air pressure hole (1). This pressure detection device for the pressure in the epidural space can facilitate the understanding of the pressure in the epidural space in the process of epidural anesthesia for providing scientific evidence for the success of epidural anesthesia.
Description
Technical field
This utility model relates to a kind of medical inspection device, particularly the epidural space pressure-detecting device.
Background technology
Epidural anesthesia is used existing so far nearly 80 years history.Domesticly begin to use from the fifties, because perfect, the loose satisfaction of flesh of its pain relieving, post-operative recovery is fast, and nursing work load is light, and easy and simple to handle, and equipment is simple, and cost is few, becomes one of main anaesthesia technology of China very soon.But the satisfaction rate of anesthetic action (improving rate) is about 80% in epidural anesthesia, still has 3.6% mortality, 16.47% imperfection rate.According to China expert to this problem to studies show that hard rolling spinal meninges is backed down in the puncture of epidural negative pressure and dura mater relevant, this just makes the detection of epidural space pressure become key technology.
Summary of the invention
The purpose of this utility model provides a kind of epidural space pressure-detecting device, and the situation so that epidural space pressure is held in convenient accurately support in epidural anesthesia guarantees for epidural anesthesia successfully provides science.
The purpose of this utility model is achieved in that the epidural space pressure-detecting device, it is characterized in that: it comprises that the syringe needle of a needle body 3, needle body 3 has a pressure hole 1; Needle body 3 centers are cavity body 2; Needle body 3 rear ends are by sealing member 4 sealings; The pressure cavity 5 of sealing member 4 is communicated with cavity body 2 and pressure hole 1; In pressure cavity 5 pressure transducer 6 is arranged, pressure transducer 6 is connected with a detecting unit 8 by lead-in wire 7, and when showing syringe needles from ligamenta flava to appearance mistake resistance sense by detecting unit 8, pressure hole 1 enters the pressure of cavity.
Described detecting unit 8 comprises display 801, processor 802, button 803, measuring amplifier 804; The pressure signal of pressure transducer 6 is delivered to processor 802 after the measuring amplifier that operational amplifier constitutes amplifies; Processor 802 is CPU of band A/D converter; The I/O mouth of processor 802 connects LCD display and button 803 simultaneously.
Described pressure transducer is differential pick off.
Described sealing member 4 adopts with needle body 3 and flexibly connects.
Described measuring amplifier 804 is made of three operational amplifiers.
Described display 801 adopts LCD display.
Described button 803 is made of P64, P65, the P66 of processor 802, but by button 803 setting pressure alarming threshold values.
This utility model characteristics are: adopt device described in the utility model once to compare 87, male 48 examples, women 39 examples, age 10-75 year.All hard outer anesthesia successfully.Neck breast section (C7-T4) 6 examples wherein, it is consistent with the negative pressure warning to lose resistance sense, negative pressure value 1.5-6.5cmH
2O; Breast section (T8-12) 35 examples, negative pressure value 0.5-4.0cmH
2O, wherein do not have lose resistance sense or lose resistance sense imprecise but negative pressure is reported to the police 6 examples (17.14%), 3 examples (8.57%) of losing resistance sense but negative pressure is not reported to the police; Waist section (L1-4) 45 examples, negative pressure value 1.1-10.9cmH
2O do not have to lose resistance sense negative pressure 3 examples (6.66%) of reporting to the police, and loses resistance sense and does not have negative pressure 4 examples (8.88%).Full group non-false positive, promptly negative pressure is reported to the police and is punctured not hard exocoel person.
Still to back down hard rolling spinal meninges relevant with dura mater puncture for the epidural negative pressure, generally very strong negative pressure (2-74mmHg) occurs in the time of 0.01s-0.03s.This detection liquid 15ms in the time continuous three negative pressure value surpass 10mmH
2O begins to report to the police, and follows the trail of gained peak suction value at 5-109mmH
2(man 42.13 ± 37.51mmH between the O
2O, woman 53.54 ± 42.28mmH
2O, P＞0.05), the result conforms to, and highly sensitive.
In the actual measurement, the negative pressure occurrence rate is that height is about 98% with cervical region and chest epidural space; Waist takes second place, and is the 88.3%. vacuum magnitude, and cervical region is-2 ~-6cmH
2O, chest-2 ~-9cmH
2O, waist+2 ~-6cmH
2O. we record, cervical part of esophagus 1.5 ~ 6.5cmH
2O, breast section 0.5 ~ 4.0cmH
2O, waist section 1.1 ~ 10.9cmH
2O. cervical part of esophagus occur to lose resistance sense and negative pressure warning 100% (6/6) occurs and conform to; The breast section does not conform to (resistance sense occurs losing and the negative pressure warning do not occur) 3/35 (8.57%); Waist section 4/45 (8.88%). but puncture does not have the resistance sense of mistake and the negative pressure alarmer occurs, breast section 6/35 (17.11%), waist section 3/45 (6.66%), it shows this instrumental sensitivity height, has improved puncture success rate, organizes non-false positive entirely.
Description of drawings
The utility model is described in further detail below in conjunction with the embodiment accompanying drawing:
Fig. 1 is the example structure sketch map;
Fig. 2 is the schematic diagram of embodiment testing circuit.
Among the figure, 1, pressure hole; 2, cavity body; 3, needle body; 4, sealing member; 5, pressure cavity; 6, pressure transducer; 7, lead-in wire; 8, detecting unit; 801, display; 802, processor; 803, button; 804, measuring amplifier.
The specific embodiment
As shown in Figure 1, the syringe needle of needle body 3 has a pressure hole 1; Needle body 3 centers are cavity body 2; During use, at first put into nook closing member in the cavity body 2 of needle body 3,, sealing member 4 is connected together with fixed pressure pick off 6 when pin reaches certain depth and during near ligamenta flava, extracts nook closing member out.In order to connect pressure transducer 6, there are sealing member 4 sealings needle body 3 rear ends; The pressure cavity 5 of sealing member 4 is communicated with cavity body 2 and pressure hole 1; At pressure cavity 5 fixation pressure pick offs 6, pressure transducer 6 is connected with a detecting unit 8 by lead-in wire 7, is entered the pressure of cavity by detecting unit 8 demonstration pressure holes 1.When continuing inserting needle, will occur losing resistance sense like this, checkout gear provides information, and the maximum of force value and measurement is simultaneously displayed on the lcd display.
As shown in Figure 2, for accurately, force value when showing inserting needle reliably, the output pressure signal of pressure transducer 6 at first amplifies signal by measuring amplifier 804, deliver to then band A the D transducer strap machine one A a D conversion mouthful P67, band A the processor 802 of D transducer, processor 802 adopts EMC78P458.Above-mentioned measuring amplifier 804 constitutes (can be finished by a slice LM324, TL064, TL084 four high guaily unit) by three operational amplifiers.Display 801 adopts the 1cd display, selects 122*32 for use, and the P50-P57 of processor 802 is as lcd display data bus, and P60-P63 is a lcd display control line.Button 803 is made of P64, P65, the P66 of processor 802.But by button 803 setting pressure alarming threshold values.
During use, at first put into nook closing member in the cavity body 2 of needle body 3, when pin reaches certain depth and during near ligamenta flava, extract nook closing member out, sealing member 4 is connected together with fixed sensing, continue inserting needle then, when occurring losing resistance sense, checkout gear provides information, and the maximum of force value and measurement is simultaneously displayed on the LCD display.
What need last explanation is, the detecting unit 8 in this utility model is not limited only to above-mentioned scheme, as by A independently the AD8080,4 half 7135,3 half 1444 digital translation that all can finish pressure signal of 8 of D transducers.And adopt band A the microprocessor of D transducer can reduce volume, reduce cost, improve reliability.Here also need to prove band A the microprocessor of D transducer also can adopt the product of other company, as other device of the MSP430 series of TI.
Claims (7)
1, epidural space pressure-detecting device is characterized in that: it comprises that the syringe needle of a needle body (3), needle body (3) has a pressure hole (1); Needle body (3) center is cavity body (2); Needle body (3) rear end is sealed by sealing member (4); The pressure cavity (5) of sealing member (4) is communicated with cavity body (2) and pressure hole (1); In pressure cavity (5) pressure transducer (6) is arranged, pressure transducer (6) is connected with a detecting unit (8) by lead-in wire (7), and when showing syringe needle from ligamenta flava to appearance mistake resistance sense by detecting unit (8), pressure hole (1) enters the pressure of cavity.
2, epidural space pressure-detecting device according to claim 1 is characterized in that: described detecting unit (8) comprises display (801), processor (802), button (803), measuring amplifier (804); The pressure signal of pressure transducer (6) is delivered to processor (802) after the measuring amplifier that operational amplifier constitutes amplifies; Processor (802) is the CPU of band A/D converter; The I/O mouth of processor (802) connects LCD display and button (803) simultaneously.
3, epidural space pressure-detecting device according to claim 1 is characterized in that: described pressure transducer is differential pick off.
4, epidural space pressure-detecting device according to claim 1 is characterized in that: described sealing member (4) adopts with needle body (3) and flexibly connects.
5, epidural space pressure-detecting device according to claim 1 is characterized in that: described measuring amplifier (804) is made of three operational amplifiers.
6, epidural space pressure-detecting device according to claim 2 is characterized in that: display (801) adopts LCD display.
7, epidural space pressure-detecting device according to claim 2 is characterized in that: button (803) is made of P64, the P65 of processor (802), P66, by button (803) but the setting pressure alarming threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079315 CN2852933Y (en) | 2005-08-26 | 2005-08-26 | Detecting instrument for epidural space pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079315 CN2852933Y (en) | 2005-08-26 | 2005-08-26 | Detecting instrument for epidural space pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2852933Y true CN2852933Y (en) | 2007-01-03 |
Family
ID=37579557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520079315 Expired - Fee Related CN2852933Y (en) | 2005-08-26 | 2005-08-26 | Detecting instrument for epidural space pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2852933Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100506144C (en) * | 2005-08-26 | 2009-07-01 | 中国人民解放军第四军医大学 | Hard membrane outer pressure detecting mechanism method and device |
| WO2010029428A1 (en) * | 2008-09-12 | 2010-03-18 | Velez Rivera Hector De Jesus | Epidural space locating device |
-
2005
- 2005-08-26 CN CN 200520079315 patent/CN2852933Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100506144C (en) * | 2005-08-26 | 2009-07-01 | 中国人民解放军第四军医大学 | Hard membrane outer pressure detecting mechanism method and device |
| WO2010029428A1 (en) * | 2008-09-12 | 2010-03-18 | Velez Rivera Hector De Jesus | Epidural space locating device |
| CN102215761A (en) * | 2008-09-12 | 2011-10-12 | 海克托·D·J·维利兹里维拉 | Epidural space locating device |
| CN102215761B (en) * | 2008-09-12 | 2014-09-03 | 海克托.D.J.维利兹里维拉 | Epidural space locating device |
| US9186172B2 (en) | 2008-09-12 | 2015-11-17 | Héctor de Jesús Velez Rivera | Epidural space locating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |