PAEDIATRIC ELECTRONIC DEVICE FOR MEASURING LENGTH

Abstract: A paediatric electronic device includes a housing, a length measuring means formeasuring the length of a young child, a memory means for storing data in regardto various weight dependent parameters, a processing means for determining thevalue of at least one of the parameters in accordance with the length of the youngchild as measured by the length measuring means, and a display means for displaying the values of the parameters.

Description: PAEDIATRIC ELECTRONIC DEVICE FOR MEASURING LENGTH This invention relates to a paediatric electronic device. More particularly, this invention relates to a paediatric electronic device whereby a person is provided with information relating to a young child. The person may be a doctor or parent and the information may relate to physical measurements, suitable drugs, dosages, medical procedures, equipment, milestones and clothing. In this specification the term "young child" includes a baby. According to the invention there is provided a paediatric electronic device which includes a housing; a length measuring means for measuring the length of a young child; a memory means for storing data in regard to various weight dependent parameters; a processing means for determining the value of at least one of the parameters in accordance with the length of the young child as measured by the length measuring means; and a display means for displaying the values of the parameters. Conveniently, the parameters may be grouped in various groups and the device may include a group selecting means for selecting which group of parameters is displayed . The parameters may relate to physical measurements, suitable drugs, dosages, medical procedures, equipment, milestones or clothing. The particular values of the various parameters for each length range may be stored in a data base or may be computed in accordance with a formula, stored in the memory means. The memory means may store a length of a young child that has been measured, until reset. The measuring means may include a length of tape housed in the housing and extractable therefrom, with an electronically operable monitoring means for monitoring the extent to which the tape has been extracted from the housing . A retraction means may also be provided to automatically retract the tape into the housing . Preferably a locking means is provided to lock the measuring tape when it has been extracted to a desired extent. The memory means may be reset when the measuring tape is extracted from the housing after having been retracted into the housing . The monitoring means may include an optical sensor responsive to formations on the tape, the number of formations passing past the sensor being counted . The formations may be openings at spaced intervals in the tape. The group selecting means may include a plurality of buttons which are selectively depressed by the person using the device to select which group of parameters is to be displayed . The device may include a power supply and a back-up power supply. The device may further have a "sleep" function whereby power consumption is reduced if the device is not operated for a specified time period . Further, a low voltage monitor may be included together with a low voltage warning annunciator. The display means may include a back-lit LCD display matrix with suitable drivers. The invention is now described, by way of an example, with reference to the accompanying drawings, in which:- Figure 1 shows a schematic front perspective view of a paediatric electronic device in accordance with the invention; Figure 2 shows a bottom view of the device; Figure 3 shows a perspective view of a holder for the device; Figure 4 shows a circuit diagram of a monitoring circuit for monitoring the extent to which a tape of the device is extracted; and 5 Figure 5 shows a schematic block diagram of electronic componentry of the device. Referring now to Figure 1 of the drawings, a paediatric electronic device in accordance with the invention is designated generally by reference 0 numeral 1 0. The device 1 0 has a housing 1 2 in which are housed a flexible metal measuring tape 1 4 and electronic componentry 1 6. The electronic componentry will be described hereinbelow with reference to Figure 5. The housing 1 2 is rectangular and is of a similar size to pagers, such that it can be held in the hand of a user and control buttons operated, and can be carried in a holder, such as the 5 holder 1 8 shown in Figure 3, on the belt of a user or in a coat pocket. The housing 1 2 has mounted therein a back-lit LCD display 20 on which the values of various parameters are displayed, depending on the extent to which the tape 14 is extracted, as will also be described more fully below. 0 The tape 1 4 is coiled within the housing 1 2 on a spool that is spring loaded by means of a coil spring 22 so that the tape 1 4 may be extracted a desired extent and is automatically retracted . A lock, which is operated frictionally by a slide 24, locks the tape 14 in a desired extracted extent. 5 The tape 1 4 has gradations 26 thereon and a number of central spaced apertures 28. The electronic componentry has an optical sensor 29 which senses the passage of the apertures 28, thereby to monitor the extent to which the 00 tape 14 has been extracted. On the front of the housing 1 2, below the display 20, there are three control buttons 30, 32 and 34. These control the parameters displayed, as will be described below. 05 Four differently coloured LED's 36, 38, 40 and 42 are mounted on the right side of the housing 1 2. The tape 14 is divided into seven sectors and the appropriate LED is energised, depending on the extent to which the tape 14 has been extended, to indicate a range. An "on/off" switch button 44 is also located 1 0 on the right side of the housing 1 2. A battery (not shown) is also housed in the housing 1 2 to provide power for the electronic componentry. A back-up battery (also not shown) is also provided. 1 5 Referring now to Figure 4, the optical sensor 29 is shown. The sensor 29 comprises an LED 46 and phototransistor 48, which drives an op-amp 50. The op-amp 50 is connected to an inverted Schmitt trigger 52 which drives an inverter 54. The LED 46 is positioned on one side of the tape 1 4 and the phototransistor 20 48 on the other side, so that when an aperture 28 is aligned therewith, the light from the LED 46 is detected by the phototransistor and the Schmitt trigger 52 operated. The inverter 54 thus provides a series of signals to a processor (described below) as the tape 14 is moved past the sensor 29. 25 The electronic componentry is now described with reference to Figure 5. The componentry includes a processor 56 which is supplied with power from the battery 58. A low voltage monitor 60 monitors the condition of the battery 58 and the processor 56 responds to a low voltage condition by displaying a suitable 30 message on the display 20, or an LED (not shown) . The sensor 29 is connected to the processor 56 and provides it with tape extension signals as described above. A reset signal is supplied from a reset switch 62. The processor 56 is also connected to the range indicating LED's 36, 38, 40 and 42, as are the control buttons 30, 32 and 34. A further press-button switch 64 operates back-lighting 35 of the display 20. Finally, the componentry also includes a memory module 66. The memory module 66 stores any program required for the processor as well as the relevant data required by the processor to display the values of the desired parameters on the display 20 in accordance with the extent to which the tape has been extracted. 40 The various parameters that are displayed, and illustrative values are now described by listing the various screen displays that are provided in the exemplary device. It is to be noted that the bottom line of each display is for 45 control purposes and the expressions therein are associated with the appropriate control button 30, 32 or 34 aligned therewith. FIRST SCREEN: 50 AGE : 8 YRS WEIGHT : 24 KG 55 SELECT OPTION? NVALU/EQUIP/DRUG 60 SECOND SCREEN: NVALU PHYSICAL RR - 1 5 - 26 b/m PR - 60 - 140/60 - 90 65 BP 97 - 1 12/57 - 71 T° OR - 35.6 - 37.6 dc AX - 35.2 - 37.2 dc 70 RE - 35.7 - 37.8 dc BIOC/XR ECG/MAIN THIRD SCREEN: 75 EQUIP VENT SET 02 100 % TV 240 - 360 ml/kg IT 0.6 SEC PIP - 20-30 cmH20 80 VR - 15 - 20 b/m PEEP - 3 - 5 cmH20 IV ETC/AIR/MAIN FOURTH SCREEN 85 DRUG INFUSIONS EPI 1.4 mg in 100 NOR ml@ 5 - 25 ml/hr DOP 144 mg in 100 90 DOB ml@ 5 - 20 ml/hr LID 288 mg in 100 ml@ 10 - 25 ml/hr RESUS1 /RES2/MAIN FIFTH SCREEN: NVALU BIOCHEM PH 7.35 - 7.45 PaC02 32 - 48 mmHg Pa02 80 - 105 mmHg Hb 13.5 g/dl UREA/Cr 27 - 62 μmol/l PHYS/XR ECG/MAIN SIXTH SCREEN: NVALU XR ECG PR > 0.1 sec QRS DURATION 0.07 s QRS/P AXIS 60/0 - 90 CSP ODO SPA < 3 mm PRE VER < 5 mm COR DIA > 13 mm BIOCHM/PHYS/MAIN SEVENTH SCREEN: 20 EQUIP HIV ETC JELCO 18 - 20 G B/FLY 21 - 22 G N G T 14 - 18 F U CAT 1 2 F 25 I C D 28 - 32 F VENT/AIRWAY/MAIN EIGHTH SCREEN: 30 EQUIP AIR WAY ETT UNCU 6.0 mm CUFFED T-T cm 17 - 18 cm L/SCOPE 2 - 3 STR 35 OR CURVE STYLET 14 F SUCTION CAT 10 F VENT/IV ETC/MAIN 40 NINTH SCREEN: DRUG RESUS1 EPI 1 : 10000 2.4 ml EPI 1 : 1000 4.8 ml ATR 0.01 % 4.8 ml BIC 24 ml mEQ 24 ml LID 2% 1 - 2 ml DFIB 48 J/96 J INFU/RESUS2/MAIN TENTH SCREEN: DRUG RESUS2 CALCI 1 % 4.8 ml FUROS 20 mg DIAZE 2.4 - 7.2 mg PHENO 360 - 480 mg D2SW 25% 48 ml LORAZ 2.4 mg INFU/RESUS1 /MAIN The abbreviated expressions in the screen displays have the following meanings:- AGE - Age AIR - Airway AIRWAY - Airway ATR - Atropine B/FLY - Butterfly BIC - Bicarbonate BIOC - Biochemistry BIOCHM - Biochemistry BP - Blood pressure COR DIA - Cord diameter CDO SPA - Odontoid space CXR - Chest x-ray DFIB - Defibrillation DIAZE - Diazepam DOP - Dopamine DRUG - Drug (or medication DRUG INFUSIONS - Drug infusions D2SW - 25% dextrose water EPI - Epinephrine EQUIP AIR WAY - Equipment airway EQUIP IV ETC - Equipment intravenous, et cetera EQUIP VENT SET - Equipment ventilatory settings ETT - Endotracheal tube FUROS - Furosemide CALCI - Calcium Hb - Haemoglobin I C D - Intercostal drain INFU - Infusions IT - Inspiratory time IV ETC - Intravenous et cetera JELCO - Jelco LID - Lidocaine LORAZ - Lorazepam MAIN - Main menu mEQ - Milli equivalents N G T - Nasogastric tube NOR ml@ - ml/h - Norepinephrine (in millilitres) at x millilitres per hour NVALU BIOCHEM - Normal values of biochemistry NVALU PHYSICAL - Normal values of clinical parameters NVALU XR ECG - Normal values related to x-ray and electrocardiogram 02 - Oxygen PaC02 - Partial pressure of carbon dioxide in arterial blood Pa02 - Partial pressure of oxygen in arterial blood PH - Unit for measurement of acidity of alkalinity PHENO - Phenobarbitone PHYS Physical PEEP - Peak end expiratory pressure PIP - Peak inspiratory pressure PR - Interval between P and R waves on ECG PRE VER - Prevertebral soft tissue shadow QRS - QRS complex on ECG RES2 - Resuscitation 2 RESUS1 - Resuscitation 1 RESUS2 - Resuscitation 2 RE - Rectal temperature RR - Respiratory rate STYLET - Stylet SUCTION CAT - Suction catheter T° OR - Oral temperature AX- Axillary temperature T-T - Trachea to teeth distance TV - Tidal volume U CAT - Urinary catheter UNCU - Uncuffed UREA/Cr - Urea / creatinine VENT Ventilation XR ECG - X-ray, electrocardiogram VR - Ventilation rate The manner in which a user navigates between the screens will now be described:- If the first screen is displayed and button 30 is pressed, then the second screen is displayed; if button 32 is pressed then the third screen is displayed; and if button 34 is pressed then the fourth screen is displayed. If the second screen is displayed and button 30 is pressed, then the fifth screen is displayed; if button 32 is pressed then the sixth screen is displayed; and if button 34 is pressed then the first screen is displayed . If the third screen is displayed and button 30 is pressed, then the seventh screen is displayed; if button 32 is pressed then the eighth screen is displayed; and if button 34 is pressed then the first screen is displayed . If the fourth screen is displayed and button 30 is pressed, then the ninth screen is displayed; if button 32 is pressed then the tenth screen is displayed; and if button 34 is pressed then the first screen is displayed. If the fifth screen is displayed and button 30 is pressed, then the second screen is displayed; if button 32 is pressed then the sixth screen is displayed; and if button 34 is pressed then the first screen is displayed . If the sixth screen is displayed and button 30 is pressed, then the fifth screen is displayed; if button 32 is pressed then the second screen is displayed; and if button 34 is pressed then the first screen is displayed . If the seventh screen is displayed and button 30 is pressed, then the third screen is displayed; if button 32 is pressed then the eighth screen is displayed; and if button 34 is pressed then the first screen is displayed . If the eighth screen is displayed and button 30 is pressed, then the third screen is displayed; if button 32 is pressed then the seventh screen is displayed; and if button 34 is pressed then the first screen is displayed. If the ninth screen is displayed and button 30 is pressed, then the fourth screen is displayed; if button 32 is pressed then the tenth screen is displayed; and if button 34 is pressed then the first screen is displayed. If the tenth screen is displayed and button 30 is pressed, then the fourth screen is displayed; if button 32 is pressed then the ninth screen is displayed; and if button 34 is pressed then the first screen is displayed.

Claims: CLAIMS: 1 . A paediatric electronic device which includes a housing; a length measuring means for measuring the length of a young child; a memory means for storing data in regard to various weight dependent parameters; a processing means for determining the value of at least one of the parameters in accordance with the length of the young child as measured by the length measuring means; and a display means for displaying the values of the parameters. 2. The paediatric electronic device as claimed in Claim 1 , in which the parameters are grouped in various groups. 3. The paediatric electronic device as claimed in Claim 2, which includes a group selecting means for selecting which group of parameters is displayed. 4. The paediatric electronic device as claimed in any one of the preceding claims, in which the parameters relate to physical measurements, suitable drugs, dosages, medical procedures, equipment, milestones or clothing . 5. The paediatric electronic device as claimed in any one of the preceding claims, in which the particular values of the various parameters for each length range are stored in a data base. 6. The paediatric electronic device as claimed in any one of Claims 1 to 4, in which the particular values of the various parameters for each length are computed in accordance with a formula, stored in the memory means. 7. The paediatric electronic device as claimed in any one of the preceding claims, in which the memory means stores a length of a young child that has been measured, until reset. 8. The paediatric electronic device as claimed in any one of the preceding claims, in which the measuring means includes a length of tape housed in the housing and extractable therefrom, with an electronically operable monitoring means for monitoring the extent to which the tape has been extracted from the housing. 9. The paediatric electronic device as claimed in Claim 8, which provides a retraction means to automatically retract the tape into the housing. 1 0. The paediatric electronic device as claimed in Claim 8 or 9, in which a locking means is provided to lock the measuring tape when it has been extracted to a desired extent. 1 1 . The paediatric electronic device as claimed in any one of Claims 8 to 10, in which the memory means is reset when the measuring tape is extracted from the housing after having been retracted into the housing. 12. The paediatric electronic device as claimed in any one of Claims 8 to 1 1 , in which the monitoring means includes an optical sensor responsive to formations on the tape, the number of formations passing past the sensor being counted . 1 3. The paediatric electronic device as claimed in Claim 1 2, in which the formations are openings at spaced intervals in the tape. 14. The paediatric electronic device as claimed in any one of Claims 3 to 1 3, in which the group selecting means includes a plurality of buttons which are selectively depressed by the person using the device to select which group of parameters is to be displayed . 1 5. The paediatric electronic device as claimed in any one of the preceding claims, which includes a power supply and a back-up power supply. 1 6. The paediatric electronic device as claimed in Claim 1 5, having a "sleep" function whereby power consumption is reduced if the device is not operated for a specified time period . 45 17. The paediatric electronic device as claimed in Claim 1 5 or 1 6, in which a low voltage monitor is included together with a low voltage warning annunciator. 18. The paediatric electronic device as claimed in any one of the preceding claims, in which the display means includes a back-lit LCD display matrix with 50 suitable drivers. 1 9. A paediatric electronic device substantially as herein described with reference to the accompanying drawings.

Inventors: NAIDOO MAURICE KELVIN, NAIDOO, MAURICE, KELVIN
Applicants: NAIDOO MAURICE KELVIN, NAIDOO, MAURICE, KELVIN
Application year: 2000
Main classification: G01B3
IPC codes: A61B5, G01B3