CN211132340U

CN211132340U - Suction tube head of negative pressure sputum aspirator

Info

Publication number: CN211132340U
Application number: CN201921665856.5U
Authority: CN
Inventors: 罗添文
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-07-31
Anticipated expiration: 2029-09-29

Abstract

The utility model provides a negative pressure sputum aspirator straw head belongs to medical instrument technical field, including linkage segment, changeover portion and attraction section, linkage segment, changeover portion and attraction section seamless integrated into one piece in proper order, linkage segment and changeover portion are circular hose, and the outside shape of attraction section is conical, and the attraction section also is the hose and includes the multistage, and each section seamless integrated into one piece in proper order, and the inside aperture of each section of attraction section is the definite value, and from left to right inside aperture between each section of attraction section is the echelonment and reduces in proper order. The problem that the sputum suction pipe enters the trachea of a patient deeply in the existing open sputum suction mode and can touch the tracheal mucosa to cause injury due to improper operation is solved; and the sputum which is absorbed may flow backwards and be sucked back to the lung by the patient, so that the lung of the patient is infected; the sputum remained in the tube is easy to flow backwards after the suction tube head is retracted, and the problem of infection to family members of patients and medical care personnel is solved.

Description

Suction tube head of negative pressure sputum aspirator

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to negative pressure sputum aspirator pipette head.

Background

Tracheotomy, a widely used surgical procedure that improves the quality of ventilation for patients by opening the airway directly. Tracheotomy has many indications, and respiratory failure or respiratory depression caused by various central or peripheral reasons requires a tracheotomy, such as craniocerebral injury, disturbance of consciousness, severe cardiopulmonary insufficiency, and the like. Most of patients who live in critical medicine department are patients who need long-term auxiliary respiratory support treatment due to diseases such as respiratory circulatory system and consciousness disturbance. In addition, severe maxillofacial trauma, angioedema, upper airway obstruction, and dyspnea due to anatomical abnormalities are also included, and the state of endotracheal intubation is difficult.

The patient who is ventilated mechanically is the key point to keep the trachea unobstructed, and sputum suction is an important measure to ensure the airway unobstructed. Because of the wide application of tracheotomy, the standard sputum aspiration operation is also very important.

The specification of the tracheotomy tube ranges from 2.0 to 11.0, the length of the tracheotomy tube is different from 37mm to 96mm, and the depth of the sputum suction tube inserted into the tracheotomy tube is generally 10 cm to 20 cm. Therefore, in the existing open type sputum suction mode, the sputum suction tube enters the trachea of a patient deeply, and the trachea mucosa is touched by misoperation to cause injury. Meanwhile, the sputum which is already absorbed may flow backwards and be sucked back into the lung by the patient, resulting in lung infection of the patient. The literature indicates that the incidence of lung infections in hospitals today due to tracheotomy is rising year by year, and can reach more than 50% in severe cases. Meanwhile, the sputum remained in the tube is easy to flow backwards after the suction tube head is retracted, so that the sputum infects families and medical care personnel of a patient and becomes an important hospital infection source.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model aims to provide a suction tube head of a negative pressure sputum aspirator, which can prevent the sputum aspirator from entering the trachea of a patient deeply and touching the tracheal mucosa to cause injury due to improper operation; the phenomenon that the absorbed sputum possibly flows back and is sucked back to the lung by the patient to cause lung infection of the patient can be prevented; can also prevent the sputum left in the tube from flowing backwards after the suction tube head is retracted, and can cause infection to family members and medical care personnel of patients.

In order to achieve the above object, the technical solution of the present invention is as follows.

The utility model provides a negative pressure sputum aspirator straw head, includes linkage segment, changeover portion and attracts the section, linkage segment, changeover portion and attraction section seamless integrated into one piece in proper order, linkage segment and changeover portion are circular hose, it is conical to attract the outside shape of section, the internal diameter of linkage segment is more than or equal to the internal diameter of changeover portion, the external diameter of linkage segment is more than or equal to the external diameter of changeover portion, the internal diameter of changeover portion is greater than attract the internal diameter of section, the external diameter of changeover portion is greater than attract the external diameter of section, attract the section also for the hose and include the multistage, from left to right the multistage seamless integrated into one piece in proper order, attract every one section inside aperture of section to be the definite value, attract between each section of section from left to right inside aperture to be the echelonment and reduce in proper order.

Further, the linkage segment includes first linkage segment, second linkage segment and third linkage segment, seamless integrated into one piece from left to right in proper order of first linkage segment, second linkage segment and third linkage segment, the internal diameter of first linkage segment, second linkage segment and third linkage segment is the same and the external diameter grow in proper order, the right-hand member of third linkage segment with the left end of changeover portion is connected, the internal diameter of third linkage segment is more than or equal to the internal diameter of changeover portion left end, the external diameter of third linkage segment is more than or equal to the external diameter of changeover portion left end.

Further, the suction section is five sections and comprises a first suction section, a second suction section, a third suction section, a fourth suction section and a fifth suction section, the first suction section, the second suction section, the third suction section, the fourth suction section and the fifth suction section are sequentially connected from left to right, the left end of the first suction section is connected with the right end of the transition section, the inner diameter of the right end of the transition section smoothly shrinks to be the same as the inner diameter of the left end of the suction section, and the outer diameter of the right end of the transition section smoothly shrinks to be the same as the outer diameter of the left end of the suction section.

Further, the length ranges of the first connecting section, the second connecting section and the third connecting section are all 9-11mm, the inner diameter ranges of the first connecting section, the second connecting section and the third connecting section are all 3-5mm, and the outer diameter ranges of the first connecting section, the second connecting section and the third connecting section are respectively 5-7mm, 6-8mm and 7-9 mm; the length range of the transition section is 14-16mm, the outer diameter range of the left end of the transition section is 5-7mm, the inner diameter range of the left end of the transition section is 3-5mm, and the right end of the transition section smoothly shrinks to the outer diameter range of 4-5mm and the inner diameter range of 2-3 mm; the total length range of the suction section is 88-92mm, the length ranges of the first suction section, the second suction section, the third suction section, the fourth suction section and the fifth suction section are 17-19mm, the outer diameter range of the left end of the first suction section is 4-5mm, the outer diameter range of the right end of the fifth suction section is 2.5-3.5mm, and the inner diameters of the first suction section, the second suction section, the third suction section, the fourth suction section and the fifth suction section are respectively 2.3-2.7mm, 2.0-2.2mm, 1.6-1.8mm, 1.2-1.4mm and 0.9-1.1 mm.

Further, the lengths of the first connecting section, the second connecting section and the third connecting section are all 10mm, the inner diameters of the first connecting section, the second connecting section and the third connecting section are all 4mm, and the outer diameters of the first connecting section, the second connecting section and the third connecting section are respectively 6mm, 7mm and 8 mm; the length of the transition section is 15mm, the outer diameter of the left end of the transition section is 6mm, the inner diameter of the left end of the transition section is 4mm, and the right end of the transition section smoothly contracts to the outer diameter of 4.5mm and the inner diameter of 2.5 mm; the total length of the suction section is 90mm, the lengths of the first suction section, the second suction section, the third suction section, the fourth suction section and the fifth suction section are 18mm, the outer diameter of the left end of the first suction section is 4.5mm, the outer diameter of the right end of the fifth suction section is 3mm, and the inner diameters of the first suction section, the second suction section, the third suction section, the fourth suction section and the fifth suction section are respectively 2.5mm, 2.1mm, 1.7mm, 1.3mm and 1 mm.

The utility model has the advantages that:

compared with the prior art, the utility model provides a suction tube head of a negative pressure sputum aspirator, wherein the suction section adopts a slender conical hose, and the suction section is matched with the length of the tracheal cannula entering the human body, so that the tracheal wall of a patient can not be touched, and the tracheal mucosa can be effectively prevented from being damaged; the inside aperture of hose that attracts the section adopts the echelonment, can effectively prevent the sputum refluence that has absorbed, prevents to be inhaled back to the lung again by the patient in, and can prevent that the straw head from withdrawing the too fast refluence of intraductal remaining sputum of back, causes the infection to patient's family members and medical personnel, the utility model discloses simple structure, easily operation, economical and practical, facilitate promotion.

Drawings

Fig. 1 is a schematic view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

In the figure: the suction device comprises a connecting section 1, a first connecting section 1-1, a second connecting section 1-2, a third connecting section 1-3, a transition section 2, a suction section 3, a first suction section 3-1, a second suction section 3-2, a third suction section 3-3, a fourth suction section 3-4 and a fifth suction section 3-5.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Examples

Referring to fig. 1 and 2, a negative pressure sputum aspirator pipette head comprises a connecting section 1, a transition section 2 and a suction section 3, the connecting section 1, the transition section 2 and the suction section 3 are sequentially and seamlessly integrated into a whole, the connecting section 1 and the transition section 2 are both round hoses, the outer shape of the suction section 3 is conical, the inner diameter of the connecting section 1 is larger than or equal to the inner diameter of the transition section 2, the outer diameter of the connecting section 1 is larger than or equal to the outer diameter of the transition section 2, the inner diameter of the transition section 2 is larger than the inner diameter of the suction section 3, the outer diameter of the transition section 2 is larger than that of the suction section 3, the suction section 3 is also a hose and comprises a plurality of sections which are sequentially and seamlessly integrated from left to right, the inner aperture of each section of the attraction section 3 is a fixed value, and the inner apertures of the sections of the attraction section 3 are sequentially reduced in a step shape from left to right.

The connecting section 1 comprises a first connecting section 1-1, a second connecting section 1-2 and a third connecting section 1-3, the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are sequentially and seamlessly integrally formed from left to right, the inner diameters of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are the same, the outer diameters of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are sequentially increased, the right end of the third connecting section 1-3 is connected with the left end of the transition section 2, the inner diameter of the third connecting section 1-3 is larger than or equal to the inner diameter of the left end of the transition section 2, and the outer diameter of the third connecting section 1-3 is larger than or equal to the outer diameter of the left end of the.

The suction section 3 is five sections and comprises a first suction section 3-1, a second suction section 3-2, a third suction section 3-3, a fourth suction section 3-4 and a fifth suction section 3-5, the first suction section 3-1, the second suction section 3-2, the third suction section 3-3, the fourth suction section 3-4 and the fifth suction section 3-5 are sequentially connected from left to right, the left end of the first suction section 3-1 is connected with the right end of the transition section 2, the inner diameter of the right end of the transition section 2 is smoothly contracted to be the same as the inner diameter of the left end of the suction section 3, and the outer diameter of the right end of the transition section 2 is smoothly contracted to be the same as the outer diameter of the left end of the suction section 3.

The length ranges of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are all 9-11mm, the inner diameter ranges of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are all 3-5mm, and the outer diameter ranges of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are respectively 5-7mm, 6-8mm and 7-9 mm; the length range of the transition section 2 is 14-16mm, the outer diameter range of the left end of the transition section 2 is 5-7mm, the inner diameter range of the left end of the transition section 2 is 3-5mm, and the right end of the transition section 2 smoothly shrinks to the outer diameter range of 4-5mm and the inner diameter range of 2-3 mm; the full length range of the suction section 3 is 88-92mm, the length ranges of the first suction section 3-1, the second suction section 3-2, the third suction section 3-3, the fourth suction section 3-4 and the fifth suction section 3-5 are all 17-19mm, the outer diameter range of the left end of the first suction section 3-1 is 4-5mm, the outer diameter range of the right end of the fifth suction section 3-5 is 2.5-3.5mm, and the inner diameter ranges of the first suction section 3-1, the second suction section 3-2, the third suction section 3-3, the fourth suction section 3-4 and the fifth suction section 3-5 are 2.3-2.7mm, 2.0-2.2mm, 1.6-1.8mm, 1.2-1.4mm and 0.9-1.1mm respectively.

The lengths of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are all 10mm, the inner diameters of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are all 4mm, and the outer diameters of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are respectively 6mm, 7mm and 8 mm; the length of the transition section 2 is 15mm, the outer diameter of the left end of the transition section 2 is 6mm, the inner diameter of the left end of the transition section 2 is 4mm, and the right end of the transition section 2 smoothly contracts to the outer diameter of 4.5mm and the inner diameter of 2.5 mm; the total length of the suction section 3 is 90mm, the lengths of the first suction section 3-1, the second suction section 3-2, the third suction section 3-3, the fourth suction section 3-4 and the fifth suction section 3-5 are all 18mm, the outer diameter of the left end of the first suction section 3-1 is 4.5mm, the outer diameter of the right end of the fifth suction section 3-5 is 3mm, and the inner diameters of the first suction section 3-1, the second suction section 3-2, the third suction section 3-3, the fourth suction section 3-4 and the fifth suction section 3-5 are respectively 2.5mm, 2.1mm, 1.7mm, 1.3mm and 1 mm.

In this embodiment, the connection section 1, the transition section 2 and the suction section 3 are sequentially formed in a seamless manner, the connection section 1 and the transition section 2 are both circular hoses, the outer shape of the suction section 3 is conical, the inner diameter of the connection section 1 is larger than or equal to the inner diameter of the transition section 2, the outer diameter of the connection section 1 is larger than or equal to the outer diameter of the transition section 2, the inner diameter of the transition section 2 is larger than the inner diameter of the suction section 3, the outer diameter of the transition section 2 is larger than the outer diameter of the suction section 3, the suction section 3 is also a hose and comprises multiple sections, the multiple sections are sequentially formed in a seamless manner from left to right, the inner diameter of each section of the suction section 3 is a fixed value, the inner diameter of each section of the suction section 3 from left to right is sequentially reduced, the length of the trachea cannula entering the body of a patient is matched, and the trachea, thereby effectually avoided haring the trachea mucosa, avoided the misoperation to damage the trachea mucosa, just the inside aperture that attracts the section is the echelonment and reduces, can effectively prevent the sputum refluence that has been absorbed, prevents to be inhaled back to the lung by the patient again, and can prevent that the straw head from withdrawing the intraductal residual sputum of back and flow backwards too fast, causes the infection to patient's family members and medical personnel.

The connection section 1 comprises a first connection section 1-1, a second connection section 1-2 and a third connection section 1-3, the first connection section 1-1, the second connection section 1-2 and the third connection section 1-3 are sequentially and seamlessly integrated from left to right, the inner diameters of the first connection section 1-1, the second connection section 1-2 and the third connection section 1-3 are the same, the outer diameters of the first connection section 1-1, the second connection section 1-2 and the third connection section 1-3 are sequentially increased, and the purpose of designing three or even a plurality of connection sections with sequentially increased outer diameters is to adapt to the drainage tubes with various diameters clinically at present, so that the connection section can be perfectly combined with the sputum aspirators with different types; the right end of the third connecting section 1-3 is connected with the left end of the transition section 2, the inner diameter of the third connecting section 1-3 is larger than or equal to the inner diameter of the left end of the transition section 2, and the outer diameter of the third connecting section 1-3 is larger than or equal to the outer diameter of the left end of the transition section 2, and the section is designed to be used for transition between the suction section and the connecting section and can play a role in retention of sputum, so that the sputum cannot be polluted due to too fast backflow.

The suction tube comprises a first suction section 3-1, a second suction section 3-2, a third suction section 3-3, a fourth suction section 3-4 and a fifth suction section 3-5 which are sequentially connected from left to right, wherein the left end of the first suction section 3-1 is connected with the right end of a transition section 2, the inner diameter of the right end of the transition section 2 is smoothly contracted to be the same as the inner diameter of the left end of the suction section 3, the outer diameter of the right end of the transition section 2 is smoothly contracted to be the same as the outer diameter of the left end of the suction section 3, and the transition section 2 and the suction section 3 of the suction tube head are smoothly contracted, so that no edge angle exists in connection, and tracheal mucosa is prevented from being damaged.

The lengths of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are all 10mm, the inner diameters of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are all 4mm, and the outer diameters of the first connecting section 1-1, the second connecting section 1-2 and the third connecting section 1-3 are respectively 6mm, 7mm and 8mm, so that the suction head can adapt to drainage tubes with various diameters clinically appearing at present, and can be perfectly combined with sputum aspirators of different types; the length of the transition section 2 is 15mm, the outer diameter of the left end of the transition section 2 is 6mm and the inner diameter of the transition section is 4mm, the right end of the transition section 2 is smoothly contracted to the outer diameter of 4.5mm and the inner diameter of 2.5mm, the section is used for the transition between the suction section and the connecting section, and meanwhile, the sputum retention function can be achieved, so that the sputum cannot be polluted due to too fast backflow; the total length of the suction section 3 is 90mm, the lengths of the first suction section 3-1, the second suction section 3-2, the third suction section 3-3, the fourth suction section 3-4 and the fifth suction section 3-5 are all 18mm, the outer diameter of the left end of the first suction section 3-1 is 4.5mm, the outer diameter of the right end of the fifth suction section 3-5 is 3mm, the inner diameters of the first suction section 3-1, the second suction section 3-2, the third suction section 3-3, the fourth suction section 3-4 and the fifth suction section 3-5 are respectively 2.5mm, 2.1mm, 1.7mm, 1.3mm and 1mm, the steps are gradual, compared with the existing long straight suction head, the steps can prevent sputum which is sucked in the suction pipe, so that the sputum is effectively prevented from being sucked back into the lung by a patient, and can prevent the sputum left in the backflow pipe from being quickly withdrawn, causing infection to the family members and the medical care personnel of the patients. Meanwhile, the 90mm length of the suction section is matched with the length of the tracheal cannula entering the human body, so that the tracheal wall of a patient cannot be touched, and the tracheal mucosa is effectively prevented from being damaged. Meanwhile, the sputum residue is not easy to clean at the step, so that the reuse rate of the suction head is greatly reduced, and the spread of infection sources is avoided from the source more effectively. In particular, the set of data is only a set of typical data of the present invention, and is not a limitation of the present invention.

Through the suction tube head of the negative-pressure sputum aspirator, the connecting section is used for being perfectly combined with different types of sputum aspirators, the transition section is used for connecting the connecting section and the suction section, and the suction section is designed into a conical hose with the diameter of 90mm, so that damage to tracheal mucosa caused by improper operation can be effectively avoided; the hose inner structure who attracts the section adopts the echelonment, can effectively prevent the sputum refluence that has received, prevents to be inhaled back to the lung by the patient again, and can prevent that the straw head from withdrawing the intraductal remaining sputum of back and flow backwards too fast, causes the infection to patient's family members and medical personnel, and because the sputum remains in ladder department, is difficult to wash, has avoided the reuse rate of straw head, avoids the propagation of infection source from the source.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a negative pressure sputum aspirator pipette head, its characterized in that, includes linkage segment (1), changeover portion (2) and attracts section (3), linkage segment (1), changeover portion (2) and attract section (3) seamless integrated into one piece in proper order, linkage segment (1) and changeover portion (2) are circular hose, attract section (3) external shape to be conical, the internal diameter of linkage segment (1) is greater than or equal to the internal diameter of changeover portion (2), the external diameter of linkage segment (1) is greater than or equal to the external diameter of changeover portion (2), the internal diameter of changeover portion (2) is greater than attract the internal diameter of section (3), the external diameter of changeover portion (2) is greater than attract the external diameter of section (3), attract section (3) also to be the hose and include the multistage, the multistage from left to right seamless integrated into one piece in proper order, attract section (3) every section inside aperture be the definite value, the inner apertures of the sections of the suction section (3) are sequentially reduced in a step shape from left to right.

2. The negative pressure sputum aspirator pipette head of claim 1, wherein the connection section (1) comprises a first connection section (1-1), a second connection section (1-2) and a third connection section (1-3), the first connection section (1-1), the second connection section (1-2) and the third connection section (1-3) are sequentially and seamlessly integrally formed from left to right, the inner diameters of the first connection section (1-1), the second connection section (1-2) and the third connection section (1-3) are the same and the outer diameters of the first connection section, the second connection section and the third connection section are sequentially increased, the right end of the third connection section (1-3) is connected with the left end of the transition section (2), the inner diameter of the third connection section (1-3) is greater than or equal to the inner diameter of the left end of the transition section (2), and the outer diameter of the third connection section (1-3) is greater than or equal to the outer diameter of the left end of the transition section (2).

3. The negative pressure sputum aspirator pipette head of claim 2, wherein the suction section (3) is five sections comprising a first suction section (3-1), a second suction section (3-2), a third suction section (3-3), a fourth suction section (3-4) and a fifth suction section (3-5), the first suction section (3-1), the second suction section (3-2), the third suction section (3-3), the fourth suction section (3-4) and the fifth suction section (3-5) are sequentially connected from left to right, the left end of the first suction section (3-1) is connected with the right end of the transition section (2), the inner diameter of the right end of the transition section (2) is smoothly contracted to be the same as the inner diameter of the left end of the suction section (3), and the outer diameter of the right end of the transition section (2) is smoothly contracted to be the same as the outer diameter of the left end of the suction section (3) .

4. The negative pressure sputum aspirator pipette head of claim 3, wherein the first connecting section (1-1), the second connecting section (1-2) and the third connecting section (1-3) are all 9-11mm in length, the first connecting section (1-1), the second connecting section (1-2) and the third connecting section (1-3) are all 3-5mm in inner diameter, and the first connecting section (1-1), the second connecting section (1-2) and the third connecting section (1-3) are respectively 5-7mm, 6-8mm and 7-9mm in outer diameter; the length range of the transition section (2) is 14-16mm, the outer diameter range of the left end of the transition section (2) is 5-7mm, the inner diameter range of the left end of the transition section is 3-5mm, and the right end of the transition section (2) smoothly shrinks to the outer diameter range of 4-5mm and the inner diameter range of 2-3 mm; the total length range of the suction section (3) is 88-92mm, the length ranges of the first suction section (3-1), the second suction section (3-2), the third suction section (3-3), the fourth suction section (3-4) and the fifth suction section (3-5) are 17-19mm, the outer diameter range of the left end of the first suction section (3-1) is 4-5mm, the outer diameter range of the right end of the fifth suction section (3-5) is 2.5-3.5mm, and the inner diameter ranges of the first suction section (3-1), the second suction section (3-2), the third suction section (3-3), the fourth suction section (3-4) and the fifth suction section (3-5) are respectively 2.3-2.7mm, 2.0-2.2mm, 1.6-1.8mm, 1.2-1.4mm and 0.9-1.1 mm.

5. The negative pressure sputum aspirator pipette head of claim 4, wherein the lengths of the first connecting section (1-1), the second connecting section (1-2) and the third connecting section (1-3) are all 10mm, the inner diameters of the first connecting section (1-1), the second connecting section (1-2) and the third connecting section (1-3) are all 4mm, and the outer diameters of the first connecting section (1-1), the second connecting section (1-2) and the third connecting section (1-3) are respectively 6mm, 7mm and 8 mm; the length of the transition section (2) is 15mm, the outer diameter of the left end of the transition section (2) is 6mm, the inner diameter of the left end of the transition section is 4mm, and the right end of the transition section (2) smoothly contracts to the outer diameter of 4.5mm and the inner diameter of 2.5 mm; the total length of the suction section (3) is 90mm, the lengths of the first suction section (3-1), the second suction section (3-2), the third suction section (3-3), the fourth suction section (3-4) and the fifth suction section (3-5) are all 18mm, the outer diameter of the left end of the first suction section (3-1) is 4.5mm, the outer diameter of the right end of the fifth suction section (3-5) is 3mm, and the inner diameters of the first suction section (3-1), the second suction section (3-2), the third suction section (3-3), the fourth suction section (3-4) and the fifth suction section (3-5) are respectively 2.5mm, 2.1mm, 1.7mm, 1.3mm and 1 mm.