CN203552411U - Anti-falling off-bed alarm system - Google Patents

Abstract

The utility model discloses an alarm system for preventing falling and getting out of bed. The alarm system for preventing falls and leaving the bed of the utility model includes: a pressure monitoring device, an infrared monitoring device, an alarm device, a data communication device and an alarm receiving device; the pressure monitoring device is placed on the bed; the infrared monitoring device includes an infrared emitter and an infrared receiver , respectively arranged at the opposite positions of the two bed rails on one side of the bed board. The utility model has a high safety factor and strong integration, and does not need to make any changes to the existing hospital bed, and has a good clinical application prospect; it advances the nursing timing for preventing falls to before dangerous actions occur, and effectively prevents the occurrence of falls , protect the safety of high-risk fall patients to the greatest extent; change the current situation that only health education and other nursing measures can be taken to reduce the incidence of falls, and support the implementation of nursing measures from technical equipment to ensure that high-risk fall patients must be accompanied by someone when they leave the bed The complete implementation of side nursing measures.

Description

An alarm system for preventing falling and getting out of bed

technical field

The utility model relates to the field of medical care, in particular to an alarm system for preventing falling and getting out of bed.

Background technique

A fall is defined as an uncontrollable or unintentional fall to the ground or other lower surface, except for violent blows, loss of consciousness, sudden paralysis, or seizures. In the United States, 30% of the elderly over the age of 65 fall every year, and the incidence of falls among the elderly over the age of 80 is as high as 50%. More than half of them have experienced multiple falls, and 10% have resulted in fractures. Falls are particularly common in elderly care settings. British literature reports that 95% of hip fractures in the elderly are caused by falls, and 10% to 20% of hip fractures die within one year. In Australia, the socioeconomic loss due to falls is approximately A$86 million per year. In my country, falls are the number one injury factor for the elderly over 65 years old. Every year, at least 20 million elderly people fall 25 million times, and the social cost is as high as 60-80 billion RMB. Elderly patients generally lack the knowledge of fall prevention, and the awareness and behavior of fall prevention are not optimistic. Falls can often lead to trauma to the body of elderly patients, decline in functional status, significant decline in quality of life, and even endanger their lives.

Fall prevention has become the focus and difficulty of nursing care for elderly hospitalized patients. According to literature reports, the high-risk group for falls among hospitalized patients is patients with partial limitation of activities and patients with free activities. The study by Wu Ting and others showed that the period of high incidence of falls in patients with cardiovascular disease is between 1 am and 9 am, and they are concentrated at the bedside: people are in a sleep state from 1 am to 6 am, the vagus nerve is excited, the coronary artery spasms, and the heart rate is more awakened When the time is high, the blood pressure drops, resulting in insufficient blood supply to the blood vessels of the whole body, causing dizziness and falls. Wang Kemin and others mentioned in the analysis of factors related to falls and bed falls among inpatients in tertiary hospitals: the toilet accounted for 57.7%, and the bedside accounted for 30.8%. It can be seen that the places where the falls are mainly concentrated in the toilet and the bedside. Through the analysis of the ongoing activities of the patients when they fell, it is found that this is related to the motivation of the patients to get up, especially for elderly patients who have been in bed for a long time. After standing up from the toilet, postural hypotension Caused by dizziness.

Elderly hospitalized patients are at high risk for falls. In addition, the elderly are "unconvinced" and do not want to trouble others. They have common thoughts and stubborn personalities. When the nurse repeatedly persuades them to inform the escort or nurse before leaving the bed at night, they will still leave the bed alone to go to the toilet at night. , thereby increasing the risk of falling. Especially at night, there are few on-duty personnel, many high-risk fall patients who need to be patrolled, and the nursing staff cannot timely and effectively detect the patient's private bed-leaving behavior, and the incidence of falls after leaving the bed at night is higher.

Utility model content

In order to solve the problem that the patient cannot be detected in time and effectively when the patient leaves the bed at night, the utility model provides a system that can accurately and timely receive the alarm before the high-risk fall patient prepares to leave the bed, thereby Avoid the fall of patients without assistance, and greatly reduce the incidence of falls.

The purpose of the utility model is to provide an alarm system for preventing falling and getting out of bed.

The sick bed comprises a bed board and two pairs of bed stoppers at the head end and the tail end of the bed respectively on both sides of the bed board.

The alarm system for preventing falls and leaving the bed of the utility model includes: a pressure monitoring device, an infrared monitoring device, an alarm device, a data communication device and an alarm receiving device; the pressure monitoring device is placed on the bed; the infrared monitoring device includes an infrared emitter and an infrared receiver , respectively arranged at opposite positions of the two bed stoppers on one side of the bed board.

The pressure monitoring device includes a plurality of pressure sensors; the plurality of pressure sensors are evenly distributed in the mattress. The pressure sensor adopts a patch pressure sensor; it is distributed on both sides of the mattress on the bed board, which can feel the pressure of the body on the bed board respectively, and can collect the pressure comprehensively and evenly without causing any discomfort to the patient. When the patient is lying flat on the bed, the pressure detected by the sensor is relatively average and the pressure value is relatively small; when the patient wants to get out of bed, he must sit on the side of the bed first, and the pressure is mainly concentrated on the side of the bed in the middle of the bed block. At this time, the pressure value detected by the sensor in the middle of a pair of bed stoppers increases, thereby exceeding the threshold value. The threshold is determined by the patient's weight and the area of contact between the patient and the bed.

A set of infrared monitoring devices are respectively arranged on both sides of the hospital bed. The infrared monitoring devices include an infrared emitter and an infrared receiver, which are respectively arranged at opposite positions of the two bed stops on one side of the bed board. When the patient is about to get out of bed, he should sit on the edge of the bed first, so that the infrared receiver cannot receive the signal emitted by the infrared transmitter, which means that the patient has come to the edge of the bed and is ready to get out of bed. This method can ensure that the patient sends an alarm when he does not stand, and some patients may fall down as soon as they stand, and this method improves the safety factor of the patient. In order to ensure that the patient can be monitored when getting out of bed from any side of the bed, a set of infrared monitoring devices are installed on both sides of the bed. When the pressure sensor exceeds the threshold and the infrared receiver cannot receive the signal, an alarm signal is generated when the two conditions are met at the same time, which greatly reduces the excessive pressure value caused by the patient just turning over, or the infrared receiver is blocked by other factors. If the two conditions are met simultaneously, it can be determined that the patient is ready to get out of bed, which greatly reduces the probability of false alarms.

The alarm device can be a separate device, or it can be built into the pressure monitoring device or infrared monitoring device. The alarm device is preferably arranged in the infrared monitoring device.

When the pressure detected by the pressure sensor exceeds the threshold and the infrared receiver does not receive infrared rays, the alarm device generates an alarm signal, and the data communication device transmits the alarm signal to the alarm receiving device through a wireless network.

When the alarm signal is transmitted to the alarm receiving device, the alarm receiving device receives the alarm signal and sends out an alarm. The alarm receiving device can use the pager equipped by the nurse, or the computer in the nurse station. The computer receives the alarm signal and an alarm window will pop up. The alarm window displays the patient's room number, bed number and name, so that the patient can be notified in time. Bedside, solve their needs or help them move after getting out of bed, so as to avoid patients' falls without assistance and greatly reduce the incidence of falls.

Further, the alarm button is included, which is arranged on the sick bed or the area near the sick bed. If the patient has informed the companion or nurse before getting out of bed, the companion can first press the alarm button and then assist the patient to get out of bed, and the behavior of getting out of bed will not call the police. When the system has issued an alarm signal, the companion can also use this button to cancel the alarm, so as to avoid the long-term alarm at night from affecting the rest of other patients.

The anti-falling and leaving-the-bed alarm system of the utility model changes the current situation in which only health education and other nursing measures can be taken to reduce the incidence of falls in the past, and advances the nursing timing for preventing falls to before dangerous actions occur. Moreover, this system has high safety factor, low power consumption, and high integration, and does not need to make any changes to the existing hospital beds, so it has a good clinical application prospect.

Advantage of the utility model:

1) It fills the blank of clinical application of the domestic bed-leaving alarm device on the hospital bed, and the device has low power consumption, high safety factor, and strong integration, and does not need to make any changes to the existing hospital bed;

2) Advance the timing of nursing care to prevent falls before dangerous actions occur, effectively prevent falls, and protect the safety of high-risk fall patients to the greatest extent;

3) To change the current situation that only health education and other nursing measures can be taken to reduce the incidence of falls, support the implementation of nursing measures from technical equipment, and ensure the complete implementation of nursing measures that high-risk patients with falls must be accompanied by someone when they leave the bed.

Description of drawings

Fig. 1 is a structural block diagram of a kind of anti-falling and leaving the bed alarm system of the present invention;

Fig. 2 is a schematic structural view of an embodiment of a fall-prevention and bed-leaving alarm system of the present invention;

Fig. 3 is a flow chart of an embodiment of an alarm system for preventing falling and getting out of bed of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further by embodiment.

The sick bed comprises a bed board 01, a headboard 03, and two pairs of bed stops 02 at the head end and the tail end of the bed board on both sides respectively.

Fig. 1 is a structural block diagram of an alarm system for preventing falls and getting out of bed of the present invention. As shown in Figure 2, the alarm system for preventing falls and leaving the bed in this embodiment includes: a pressure monitoring device, an infrared monitoring device, an alarm device, a data communication device, an alarm receiving device 4 and an alarm pin 5; the pressure monitoring device is placed on the bed board 01 Above; the infrared monitoring device includes an infrared transmitter 2 and an infrared receiver 3, which are respectively arranged at opposite positions of the two bed stoppers 02 on one side of the bed board 01. Alarm device is built in infrared receiver 3 li.

The pressure monitoring device includes a plurality of pressure sensors 1 , and the pressure sensors 1 are patch pressure sensors; they are distributed on both sides of the mattress on the bed board 1 . In this embodiment, a 3*2 distribution is adopted, and three pressure sensors 1 are evenly distributed on each side of the mattress and in the middle of a pair of bed stops 02, so that no matter which side the patient is going to get out of bed, All pressure sensors 1 can detect changes in pressure. When the patient is about to get out of bed, the pressure detected by the pressure sensor 1 exceeds the threshold. The pressure sensor adopts the MPXA6115A chip pressure sensor of Freescale Semiconductor Company, which can measure absolute pressure and has temperature compensation and calibration functions, which can effectively solve the problem that the output signal of electronic components will change with temperature due to their certain temperature coefficient. And the problem of drift.

其中G为病人的体重，S为患者与病床的接触面积，s1为压力传感器的面积，压力传感器的直径为2.5cm，则压力传感器的面积s为4.9×10^-4m²。在本实施例中，患者的质量m为50kg，则体重G约为500N。患者平躺在病床上时，与病床的接触面积S为0.3m²，侧卧时与病床的接触面积S为0.2m²，则对病床的压强大致不会超过500N/0.2m²=2500Pa，压力传感器感受到的压力为P×s1=1.23N；患者想要下床，坐到病床边时，与病床的接触面积为0.1m2，则此时对病床的压强P约为500N/0.1m²=5000Pa，压力传感器感受到的压力为P×s1=2.45N。因此，在本实施例中，压力传感器的阈值就可以设定为2N。The pressure felt by each pressure sensor is

Where G is the weight of the patient, S is the contact area between the patient and the hospital bed, s1 is the area of the pressure sensor, and the diameter of the pressure sensor is 2.5 cm, so the area s of the pressure sensor is 4.9×10 ^-4 m ² . In this embodiment, the mass m of the patient is 50kg, and the body weight G is about 500N. When the patient lies on the bed, the contact area S with the bed is 0.3m ² , and when the patient is lying on the side, the contact area S with the bed is 0.2m ² , then the pressure on the bed Generally, it will not exceed 500N/0.2m ² =2500Pa, and the pressure felt by the pressure sensor is P×s1=1.23N; when the patient wants to get out of bed and sits on the side of the bed, the contact area with the bed is 0.1m2, then this The pressure P on the hospital bed is about 500N/0.1m ² =5000Pa, and the pressure felt by the pressure sensor is P×s1=2.45N. Therefore, in this embodiment, the threshold of the pressure sensor can be set to 2N.

A set of infrared monitoring devices are respectively arranged on both sides of the hospital bed. The infrared monitoring devices include an infrared emitter 2 and an infrared receiver 3, which are respectively arranged at opposite positions of the two bed stops 02 on one side of the bed board. In order to ensure that the patient can be monitored when getting out of bed from any side of the bed, a set of infrared monitoring devices are installed on both sides of the bed. In the present embodiment, the alarm receiving device 4 adopts the computer of the nurse's station, is programmed with vc++, and adopts the visual studio6.0 development platform. When the alarm signal is transmitted to the computer in the nurse station, the computer receives the alarm signal and an alarm window will pop up, which displays the patient's room number, bed number and name, and the previous alarm records can be viewed.

Further, an alarm pin button 5 is installed at the head of the bed 03, and when the alarm is not needed, the alarm for leaving the bed is canceled.

In this embodiment, when the patient is ready to get out of bed, the infrared receiver receives 3 less than the signal emitted by the infrared transmitter 2; at the same time, the pressure detected by the pressure sensor 1 exceeds the threshold 2N, and the alarm device generates an alarm signal, and the data communication device The alarm signal is transmitted to the alarm receiving device 4 in a wireless network; the alarm receiving device 4 receives the alarm signal and sends out an alarm. The implementation process of this embodiment is shown in FIG. 3 .

Finally, it should be noted that the purpose of announcing the implementation is to help further understand the utility model, but those skilled in the art can understand: without departing from the spirit and scope of the utility model and the appended claims, various replacements and Modifications are possible. Therefore, the utility model should not be limited to the content disclosed in the embodiments, and the protection scope of the utility model is subject to the scope defined in the claims.

Claims (9)

1. anti-falling from bed warning system, sick bed comprises bed board (01) and at the head end of both sides and two pairs of beds of bed end of bed board (01), keeps off (02) respectively, it is characterized in that, described anti-falling comprises from bed warning system: pressure monitoring device, infrared monitoring device, warning device, data communication equipment (DCE) and warning receiving trap (4); Pressure monitoring device is placed on bed board (01); Infrared monitoring device comprises infrared transmitter (2) and infrared remote receiver (3), is separately positioned on the relative position of two the bed gears (02) that are positioned at bed board (01) one side.

2. anti-falling from bed warning system as claimed in claim 1, is characterized in that, described pressure monitoring device comprises multiple pressure transducers (1); Described multiple pressure transducer (1) is distributed in mattress.

3. anti-falling from bed warning system as claimed in claim 2, is characterized in that, described pressure transducer (1) adopts SMD pressure transducer.

4. anti-the falling from bed warning system of stating as claim 2, is characterized in that, described pressure transducer (1) is distributed in the both sides of the mattress on bed board (01).

5. anti-falling from bed warning system as claimed in claim 2, is characterized in that, the pressure that pressure transducer (1) detects exceedes threshold value, and infrared remote receiver (3) does not receive infrared ray simultaneously, and warning device produces alerting signal.

6. anti-falling from bed warning system as claimed in claim 1, is characterized in that, described warning receiving trap (4) is the pager that nurse is equipped with oneself, or is the computer in nurse station.

7. anti-falling from bed warning system as claimed in claim 1, is characterized in that, described warning device is built in pressure monitoring device or infrared monitoring device.

8. anti-falling from bed warning system as claimed in claim 1, is characterized in that, further comprises the alert button of pin (5), the alert button of described pin (5) arrange on one's sick bed or sick bed near region, or for movably installing.

9. anti-falling from bed warning system as claimed in claim 2, is characterized in that, described pressure transducer (1), for 3*2 distributes, in the both sides of mattress and in the centre of a pair of bed gear (02), is uniformly distributed respectively 3 pressure transducers (1).

Images