Energy metabolism monitoring device based on indirect heat measuring method

Abstract

The utility model discloses an indirect calorimetry-based energy metabolism monitoring device, which comprises an indirect calorimeter with a display screen and a breathing channel, the breathing channel is divided into an instrument end and a patient end, and the instrument end and the patient end are respectively provided with a sealing clamping structure; the sealing clamping structure comprises a sealing screw cap and a sealing piece, the sealing piece comprises a sealing ring and a deformation ring, the sealing screw cap is in threaded connection with the end of the breathing channel, and when the sealing screw cap is screwed, the deformation ring is extruded, so that the deformation ring inwards extrudes the inner surface of the sealing ring; a sealing clamping structure is additionally arranged on a breathing channel of an existing indirect calorimeter, so that the indirect calorimeter can be installed on an existing breathing machine, an oxygen inhalation tube and a breathing mask worn by a patient according to actual requirements.

Description

Technical Field

[0001] The utility model relates to a medical device, in particular to an energy metabolism monitoring device based on indirect calorimetry. Background Art

[0002] For hospitalized patients, accurately measuring their actual energy consumption and guiding their energy supply can help prevent overfeeding or underfeeding, thereby improving short-term mortality and reducing hospitalization time.

[0003] The Chinese Clinical Practice Guidelines for Nutritional Assessment and Monitoring in Adult ICUs recommends that indirect calorimetry (IC) be used to measure actual energy consumption and guide energy supply during nutritional therapy for critically ill patients. Using IC to measure resting energy expenditure (REE) is currently an ideal method for determining the energy requirements of patients, and is particularly important for guiding the setting of enteral and parenteral nutrition targets.

[0004] However, intensive care units (ICUs) currently still use other prediction formulas or body mass-based calorie calculation formulas to estimate REE, which have been shown to lack predictive value in relevant studies. Although the accuracy of IC-REE has been confirmed, it is still difficult to implement in ICUs because it requires monitoring of carbon dioxide excretion (VCO2) and oxygen consumption (VO2) per unit time and tidal volume, which is limited by the measurement equipment. Currently, ICUs mainly measure IC-REE with the help of ventilators with VCO2 and VO2 monitoring functions or energy metabolism monitoring modules. Therefore, IC-REE measurement is mainly carried out in patients with mechanical ventilation using specific ventilators, while other patients using ventilators without energy metabolism monitoring functions and non-mechanically ventilated patients are difficult to measure or need to use large energy metabolism vehicles for testing.

[0005] At present, the foreign medical company Microlife MedGem has designed an energy metabolism monitoring device called BodyGem IndirectCalorimeters, which miniaturizes most of the components of a large energy metabolism vehicle and makes it a handheld metabolic monitoring instrument. When using it, the patient clamps the nostrils (to prevent exhalation from the nose) and breathes with the mouth facing the collection mask (the patient exhales and inhales independently). This metabolic monitoring instrument is only suitable for healthy patients, but not for patients who are intubated or wearing a breathing mask, especially for patients who cannot breathe independently. And the collection hood of the metabolic monitoring instrument is difficult to apply to existing ventilators or patients (patients wearing endotracheal intubation / tracheotomy tubes).

[0006] Therefore, how to design an energy metabolism monitoring device based on indirect calorimetry that can be quickly assembled and applied to ordinary ventilators and patients who cannot breathe independently, and used for indirect calorimetry to statistically analyze the patient's metabolic status, is the technical problem to be solved in this case. Utility Model Content

[0007] The purpose of the utility model is to provide an energy metabolism monitoring device based on indirect calorimetry. By adding a sealing clamping structure to the breathing channel of the existing indirect calorimeter, the indirect calorimeter can be installed on the existing ventilator, oxygen inhalation tube and breathing mask worn by the patient according to actual needs.

[0008] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0009] An energy metabolism monitoring device based on indirect calorimetry comprises an indirect calorimeter with a display screen and a breathing channel, wherein the breathing channel is divided into an instrument end and a patient end, a partition is arranged in the breathing channel, and the partition divides the breathing channel into an inhalation channel and an exhalation channel, and both the instrument end and the patient end are provided with a sealing clamping structure, and the sealing clamping structure can be used for docking the breathing channel with a ventilator tube or an oxygen mask interface; the sealing clamping structure comprises a sealing screw cap and a sealing member, and the sealing member comprises a sealing ring and a deformation ring, and the sealing ring can be fixed to the inner wall of the breathing channel at the instrument end or the patient end, and the deformation ring is located at the opening end face of the breathing channel, and a threaded connection is adopted between the sealing screw cap and the end of the breathing channel, and the sealing screw cap will squeeze the deformation ring when tightened, so that the deformation ring squeezes the inner surface of the sealing ring inward.

[0010] Preferably, a limiting ring is further provided on the outside of the deformation ring, and the inner wall of the sealing rotary cover is provided with a limiting groove, and the limiting ring can be embedded in the limiting groove.

[0011] Preferably, the cross section of the deformation ring is an isosceles trapezoid, and the end face of the breathing passage is an annular cone.

[0012] Preferably, the breathing channel is externally connected to an oxygen branch pipe, the oxygen branch pipe is in communication with an inhalation duct, and the inhalation duct is located on the outer surface of the breathing channel at the instrument end.

[0013] Preferably, the indirect calorimeter includes a power supply module, and the power supply module adopts a detachable battery.

[0014] Preferably, the power supply module includes a battery compartment with an openable compartment cover, and the battery is a No. 5 / No. 7 dry cell or a rechargeable battery. Compared with the prior art, the energy metabolism monitoring device based on indirect calorimetry using the above technical solution has the following beneficial effects:

[0015] 1. The design of the sealed clamping structure of this device makes it not only adaptable to the breathing tube of mechanically ventilated patients, but also suitable for patients who inhale oxygen through masks and nasal cannula, so that the energy metabolism monitoring based on indirect calorimetry can be applied to different groups of patients. The design of this device can provide energy metabolism monitoring equipment based on indirect calorimetry for ICU patients with different oxygen supply status. The measured data can provide a certain reference for medical staff and help set appropriate target calories for ICU patients.

[0016] 2. The sealed screw cap is equipped with a seal, which can effectively seal the port when the mask interface and the ventilator tube are connected to the energy metabolism monitoring device to avoid gas leakage and ensure the adequacy of the data.

[0017] 3. Studies have shown that resting energy expenditure (REE) is a relatively stable value, and a 30-minute measurement can show high accuracy. The power supply module uses batteries (especially small batteries such as No. 5 or No. 7), and no additional wiring is required, which helps to reduce the time the device bears the burden of the patient's respiratory equipment and reduces the measurement burden on medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the energy metabolism monitoring device based on indirect calorimetry in the embodiment.

[0019] Figure 2 Schematic diagram of the structure of the energy metabolism monitoring device in the embodiment.

[0020] Figure 3 Schematic diagram of the structure of the sealing member in the embodiment.

[0021] Figure 4 Schematic diagram of the structure of the sealing screw cap in the embodiment.

[0022] Figure 5 It is a schematic diagram of the assembly of the sealing member and the sealing screw cap in the embodiment.

[0023] Figure 6 Schematic diagram of the deformation of the sealing member when the sealing screw cap is tightened in the embodiment.

[0024] Figure 7 Schematic diagram of the use of the energy metabolism monitoring device in the embodiment (ventilator).

[0025] Figure 8 Schematic diagram of the use of the energy metabolism monitoring device in the embodiment (oxygen tube).

[0026] Fig. 9 Schematic diagram of the sensor distribution of the energy metabolism monitoring device in the embodiment.

[0027] Fig.10 Schematic diagram of the operation of the energy metabolism monitoring device in the embodiment (during inhalation).

[0028] Fig.11 Schematic diagram of the operation of the energy metabolism monitoring device in the embodiment (during exhalation).

[0029] Figure numerals: 1, battery compartment; 10, compartment cover; 2, control button; 20, power button; 21, + button; 22, - button; 23, confirm button; 3, indirect calorimeter, 30, display screen; 4a, inhalation duct; 4b, expiratory duct; 40, partition; 41, patient end; 410, inhalation one-way membrane flap; 42, instrument end; 420, expiratory one-way membrane flap; 43, oxygen branch pipe; 5, sealing screw cap; 52, limit groove; 6, sealing part; 60, sealing ring; 61, deformation ring; 62, limit ring; FiO2, oxygen concentration sensor; FiCO2, carbon dioxide concentration sensor; FeO2, expiratory oxygen concentration sensor; FeCO2, expiratory carbon dioxide concentration sensor; TV, expiratory tidal volume; RR, expiratory frequency micro switch. DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0031] like Figures 1 to 6 An energy metabolism monitoring device based on indirect calorimetry is shown, comprising an indirect calorimeter with a display screen and a breathing channel.

[0032] The breathing channel is divided into an instrument end 42 and a patient end 41. Both the instrument end 42 and the patient end 41 are provided with a sealing clamping structure, which can be used to connect the breathing channel with a ventilator tube or an oxygen mask interface.

[0033] The sealing clamping structure includes a sealing screw cap 5 and a sealing member 6. The sealing member 6 includes a sealing ring 60 and a deformation ring 61. The sealing ring 60 can be fixed to the inner wall of the breathing passage at the instrument end 42 or the patient end 41, and the deformation ring 61 is located at the opening end face of the breathing passage.

[0034] See also Figure 6 The sealing screw cap 5 is connected to the end of the breathing passage by a threaded connection. When the sealing screw cap 5 is tightened, the deformation ring 61 is squeezed, causing the deformation ring 61 to squeeze the inner surface of the sealing ring 60 inward, thereby tightening the ventilator tube / oxygen mask interface ( Figure 6 The black part in the middle is the interference fit position) to achieve the purpose of sealing.

[0035] See also Figure 3 and Figure 4 A limiting ring 62 is also provided outside the deformation ring 61, and the inner wall of the sealing rotary cover 5 has a limiting groove 52. The limiting ring 62 can be embedded in the limiting groove 52. The limiting ring 62 is fixed by the limiting groove 52, so that the sealing member 6 can be relatively fixed with the sealing rotary cover 5 to prevent the sealing member 6 from falling off or shifting during the tightening process of the sealing rotary cover 5 to form wrinkles.

[0036] The cross section of the deformation ring 61 is an isosceles trapezoid, and the end surface of the breathing channel is an annular cone. The deformation ring 61 contacts the end surface of the breathing channel in a surface contact manner, and guides the deformation ring 61 to bulge toward the inner surface during deformation.

[0037] The indirect calorimeter includes a power supply module, which includes a battery compartment 1. The battery compartment 1 has an openable compartment cover 10. The battery adopts No. 7 rechargeable battery. The battery can be used repeatedly. If the rechargeable battery cannot be found during temporary use, the dry battery can be used for replacement. There is no constraint of connecting wires, so it is more convenient to use.

[0038] like Figure 7 As shown, if the patient uses a ventilator for oxygen supply, the patient end of the energy metabolism monitoring device is connected to the patient's endotracheal intubation or tracheostomy tube interface, and the instrument end is connected to the ventilator's connecting pipe.

[0039] like Figure 8 As shown, the breathing channel is connected to an oxygen branch pipe 43, which is connected to the inhalation channel 4a. The inhalation channel 4a is located on the outer surface of the breathing channel at the instrument end 42. The oxygen branch pipe 43 is mainly used to connect with the oxygen tube. When the patient uses a breathing mask to supply oxygen (such as Figure 8 When the patient uses a nasal cannula for oxygen supply, a special plugging piece is used to close the oxygen branch 43, and the inhalation duct 4a of the instrument end 42 is closed and the exhalation duct 4b is kept open. When the nasal cannula is used for oxygen supply, the patient's face needs to insert the nasal cannula into the breathing mask, and then the breathing mask is sealed to ensure that the inhaled and exhaled gases will pass through the energy metabolism monitoring device.

[0040] See also Fig. 9 A partition 40 is provided in the breathing passage, and the partition 40 divides the breathing passage into an inhalation passage 4a and an exhalation passage 4b.

[0041] The inspiratory duct 4a (left side) is provided with an inlet oxygen concentration sensor FiO2, an inlet carbon dioxide concentration sensor FiCO2 and an inspiratory one-way membrane flap 410. The expiratory duct 4b (right side) is provided with an expiratory oxygen concentration sensor FeO2, an expiratory carbon dioxide concentration sensor FeCO2, an expiratory tidal volume TV, an expiratory frequency micro switch RR and an expiratory one-way membrane flap 420.

[0042] See also Fig.10When the patient inhales, the airflow flows from top to bottom, the inhalation one-way membrane flap 410 opens downward, and the exhalation one-way membrane flap 420 closes downward, so that the inhaled gas can only flow downward through the left inhalation duct 4a, passing through the oxygen concentration sensor FiO2 and the carbon dioxide concentration sensor FiCO2, and the specific concentration value of the inhaled gas can be seen on the display screen 30.

[0043] See also Fig.11 When the patient exhales, the airflow flows from bottom to top, the inhalation one-way membrane flap 410 closes upward, and the exhalation one-way membrane flap 420 opens upward, so that the exhaled gas can only flow upward through the right exhalation duct 4b, passing through the exhaled carbon dioxide concentration sensor FeCO2, the exhaled tidal volume TV, and the exhaled oxygen concentration sensor FeO2, and at the same time triggering the exhalation frequency micro switch RR, so that the specific concentration value of the exhaled gas can be seen on the display screen 30, and the patient's respiratory frequency can also be seen. The patient's energy metabolism is calculated through the above-collected values.

[0044] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An energy metabolism monitoring device based on indirect calorimetry, comprising an indirect calorimeter with a display screen, characterized in that: It also includes a breathing channel, the breathing channel is divided into an instrument end (42) and a patient end (41), a partition (40) is provided in the breathing channel, the partition (40) divides the breathing channel into an inhalation channel (4a) and an exhalation channel (4b), the instrument end (42) and the patient end (41) are both provided with a sealing clamping structure, and the sealing clamping structure can be used to connect the breathing channel with a ventilator tube or an oxygen mask interface; The sealing clamping structure comprises a sealing screw cap (5) and a sealing member (6), wherein the sealing member (6) comprises a sealing ring (60) and a deformation ring (61), wherein the sealing ring (60) can be fixed to the inner wall of the breathing passage at the instrument end (42) or the patient end (41), and the deformation ring (61) is located at the opening end face of the breathing passage. The sealing screw cap (5) is connected to the end of the breathing passage by a threaded connection. When the sealing screw cap (5) is tightened, the deformation ring (61) is squeezed, causing the deformation ring (61) to press the inner surface of the sealing ring (60) inwardly.

2. The energy metabolism monitoring device based on indirect calorimetry according to claim 1, characterized in that: A limiting ring (62) is also provided outside the deformation ring (61), and the inner wall of the sealing rotary cover (5) is provided with a limiting groove (52), and the limiting ring (62) can be embedded in the limiting groove (52).

3. The energy metabolism monitoring device based on indirect calorimetry according to claim 1, characterized in that: The cross section of the deformation ring (61) is an isosceles trapezoid, and the end surface of the breathing passage is an annular conical surface.

4. The energy metabolism monitoring device based on indirect calorimetry according to claim 1, characterized in that: The breathing channel is externally connected to an oxygen branch pipe (43), the oxygen branch pipe (43) is in communication with the air inhalation channel (4a), and the air inhalation channel (4a) is located on the outer surface of the breathing channel at the instrument end (42).

5. The energy metabolism monitoring device based on indirect calorimetry according to claim 1, characterized in that: The indirect calorimeter comprises a power supply module, and the power supply module adopts a detachable storage battery.

6. The energy metabolism monitoring device based on indirect calorimetry according to claim 5, characterized in that: The power supply module comprises a battery compartment (1), the battery compartment (1) having an openable compartment cover (10), and the storage battery adopts AA / AA dry cell or rechargeable battery.

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