CN110151222A - Stages of labor navigation curve generation method, fetal head position measuring method and device - Google Patents
Stages of labor navigation curve generation method, fetal head position measuring method and device Download PDFInfo
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Abstract
The invention discloses a kind of stages of labor navigation curve generation methods, comprising the following steps: obtains upper margin of pubic bone, the coordinate of lower margin of pubic bone on the ultrasound image；According to precognition the constraint relationship, coordinate of the guiding point on the ultrasound image is successively calculated；It is sequentially connected the guiding point on the ultrasound scan planes, generates stages of labor navigation curve.The invention discloses a kind of fetal head position measuring methods, comprising the following steps: stages of labor navigation curve is generated on the ultrasound image；It is sequentially allocated each guiding point scale numerical value；In the ultrasound image, fetal head profile scale corresponding with the childbirth intersection point of lead curve, as fetal head position.The present invention also provides a kind of fetal head positions to calculate device, which is characterized in that obtains module, characteristic point mark module and data processing module including ultrasonic imaging.Fetal head position measuring method and device provided by the invention, can it is more convenient, objectively calculate fetal head position, provide foundation for clinical decision.
Description
Technical field
The present invention relates to obstetrics' monitoring arts, in particular to a kind of fetal head position measuring method.
Background technique
In childbirth is learned, the size and dynamic space relationship (referred to as " head basin relationship ") of fetal head and pelvis select childbirth options
It selects and disposes and is most important；Clinical obstetrics needs accurately monitor these data at any time, to help doctor and midwife's carry out section
Childbirth decision.
Understand fully that posture of the fetus in uterus is extremely important, because it is related to the selection of childbirth options.Since fetus is soaked
Bubble is in amniotic fluid, and fetal head is the most heavy part of body, so fetal head is generally downward, i.e. head position accounts for about the 95% of childbirth sum.
Other such as buttocks presentation (breech presentation), foot or leg presentation, arm presentations (transverse presentation) etc. belong to the abnormal position of foetus, unsuitable suitable
It produces.When fetal head position, a surely natural labor cannot guarantee that, according to statistics, head position difficult labour Zhan always gives a birth the 12.56% of number.Head position point
Childbirth is influenced by four force of labor, birth canal, fetus and mental element principal elements.Wherein, the orientation of fetal head is that fetus was being given a birth
Dynamic parameter in journey, paying close attention to the fetal head orientation in stages of labor helps to understand the real-time condition of fetus and cope in time.
On childbirth is learned, clinic usually indicates the space between fetal head and pelvis with fetal head position and two, direction parameter
Relationship.Fetal head position describes the spatial relationship of fetal head presentation Yu ischial spine plane.It is clinically mark with ischial spine plane,
It when the flat ischial spine of fetal head skull minimum point, is denoted as " 0 ", when ischial spine plane above 1cm is denoted as "+1 ", below ischial spine plane
It is denoted as when 1cm " -1 ", and so on.Fetal head direction describes the pass of fetus presentation occipital bone Yu maternal pelvic front, rear, left and right
System, eight orientation can be divided into: before pillow, after left occipitoanterior (LOA), left occipitotransverse (LOT), left occipitoposterior (LOP), pillow, right occipitoposterior (ROP), right occipitotransverse, right occipitoanterior.The position of foetus is not
As fruit is not corrected, when childbirth, can cause to have difficult labour, so determining that fetal head direction and position are of crucial importance in the progress of labor.
A kind of utilize is provided application No. is 200710027843.0 Chinese invention patent " a kind of birth prccess monitoring device " to surpass
The method of sound wave triangle utilizes the tool of three arrangements triangular in shape come the device and method for measuring cervical dilatation, fetal head position
The ultrasonic sensor and three ultrasonic sensor, pressure sensor and doppler ultrasounds with receive capabilities for having transmission-receiving function are visited
Head, to measure fetal head position.But this method has wound, currently without being promoted.Therefore, clinical at present or use
Manually refer to that the mode of inspection, a kind of electronic surveying mode of urgent clinical needs accurately, objectively measure fetal head position.
Summary of the invention
The object of the invention is that solve the above problems, provide it is a kind of can accurately, objectively measure fetal head position
Device and method.
In order to achieve the above object, the present invention provides a kind of generation method of stages of labor navigation curve, which is characterized in that including
Following steps:
(A1) upper margin of pubic bone, the coordinate of lower margin of pubic bone on the ultrasound image are obtained；
(A2) according to precognition the constraint relationship, coordinate of the guiding point on the ultrasound image is successively calculated；
(A3) it is sequentially connected the guiding point on the ultrasound scan planes, generates stages of labor navigation curve.
Preferential, the precognition the constraint relationship is: the ultrasound scan planes epipubis combines upper limb, lower margin of pubic bone
Three interior angle angles of the triangle constituted with any one of guiding point are precognitions；
, the precognition the constraint relationship is: ultrasound scan planes epipubis joint upper limb, lower margin of pubic bone and any
Three interior angle angles of the triangle that one guiding point is constituted are precognitions；
According to precognition the constraint relationship, calculating the guiding point in the step of coordinate on the ultrasound image includes:
If the coordinate of ultrasound image epipubis joint upper limb, lower margin of pubic bone is (x1, y1), (x2, y2) respectively,
The two of them interior angle angle of the triangle of precognition is A1, A2, the then coordinate (x3, y3) of the guiding point are as follows:
X3=(x1*cot (A2)+x2*cot (A1)+y1-y2)/(cot (A1)+cot (A2))；
Y3=(y1*cot (A2)+y2*cot (A1)+x2-x1)/(cot (A1)+cot (A2)).
Preferential, the guiding point at least 11.
The present invention also provides a kind of fetal head position measuring methods, which comprises the following steps:
(B1) using the described in any item stagess of labor of claims 1 to 33 navigation curve generation method on the ultrasound image
Generate stages of labor navigation curve；
(B2) it is sequentially allocated each guiding point scale numerical value；
(B3) in the ultrasound image, fetal head profile scale corresponding with the childbirth intersection point of lead curve, as fetal head
Position.
Preferential, the guiding point quantity is 11, in step (B2), the scale numerical value of the guiding point is followed successively by-
5、-4、-3、-2、-1、0、+1、+2、+3、+4、+5。
Preferential, each adjacent guiding point is equally divided into 10 scales, span 0.1.
The present invention also provides a kind of fetal head positions to calculate device, which is characterized in that obtains module, feature including ultrasonic imaging
Point mark module and data processing module；
The ultrasonic imaging obtains module for obtaining target ultrasound image, shows pubis in the target ultrasound image
Upper and lower edge and fetal head profile；
The characteristic point mark module for marking the upper and lower edge of pubis is also used to that the fetal head profile is marked to lead with stages of labor
The intersection point of boat curve；
The data processing module is used to successively calculate guiding point in the target ultrasound image according to precognition the constraint relationship
On coordinate, and be sequentially connected the guiding point on the target ultrasound image, generate stages of labor and navigate curve, finally according to institute
State fetal head profile and stages of labor navigation curve intersection point the stages of labor navigation curve on scale, determine fetal head position.
The present invention has the following advantages compared with the existing technology and beneficial effect, fetal head position measuring and calculating provided by the invention
Method, can it is more convenient, objectively calculate fetal head position, provide foundation for clinical decision.
Detailed description of the invention
Fig. 1 is stages of labor navigation curve generation method schematic diagram.
Fig. 2 is fetal head position measuring method schematic diagram.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment
The present embodiment provides a kind of generation methods of stages of labor navigation curve, which comprises the following steps:
(A1) upper margin of pubic bone, the coordinate of lower margin of pubic bone on the ultrasound image are obtained；
(A2) according to precognition the constraint relationship, coordinate of the guiding point on the ultrasound image is successively calculated；
(A3) it is sequentially connected the guiding point on the ultrasound scan planes, generates stages of labor navigation curve.
The embodiment preferential as the present invention, the precognition the constraint relationship is: the ultrasound scan planes epipubis joint
Three interior angle angles of the triangle that upper limb, lower margin of pubic bone and any one of guiding point are constituted are precognitions；
According to precognition the constraint relationship, calculating the guiding point in the step of coordinate on the ultrasound image includes:
If the coordinate of ultrasound image epipubis joint upper limb, lower margin of pubic bone is (x1, y1), (x2, y2) respectively,
The two of them interior angle angle of the triangle of precognition is A1, A2, the then coordinate (x3, y3) of the guiding point are as follows:
X3=(x1*cot (A2)+x2*cot (A1)+y1-y2)/(cot (A1)+cot (A2))；
Y3=(y1*cot (A2)+y2*cot (A1)+x2-x1)/(cot (A1)+cot (A2)).
Preferential, the guiding point at least 11.
The present embodiment also provides a kind of fetal head position measuring method, which comprises the following steps:
(B1) using the described in any item stagess of labor of claims 1 to 33 navigation curve generation method on the ultrasound image
Generate stages of labor navigation curve；
(B2) it is sequentially allocated each guiding point scale numerical value；
(B3) in the ultrasound image, fetal head profile scale corresponding with the childbirth intersection point of lead curve, as fetal head
Position.
Shown in referring to Fig.1, rectangle frame indicates ultrasound image, using the left upper apex of the ultrasound image as coordinate origin, to
The right side is x-axis, establishes coordinate system downwards for y-axis, and mark point S1, S2 respectively represents upper margin of pubic bone, lower margin of pubic bone super
Imaging in acoustic image.The present embodiment illustrates coordinate of the guiding point (- 4) on the ultrasound image with guiding point (- 4)
Calculating step, the calculating step of other guiding points is similar.
Firstly the need of explanation, (three vertex of triangle are divided into guiding point (- 4), shame to broken line triangle described in figure
Synostosis upper limb S1, lower margin of pubic bone S2) three interior angles be known to systemic presupposition.If its of the triangle of precognition
In two interior angle angles be A1, A2, and the coordinate point of the ultrasound image epipubis joint upper limb, lower margin of pubic bone obtained
It is not (x1, y1), (x2, y2).The then coordinate (x3, y3) of the guiding point are as follows:
X3=(x1*cot (A2)+x2*cot (A1)+y1-y2)/(cot (A1)+cot (A2))；
Y3=(y1*cot (A2)+y2*cot (A1)+x2-x1)/(cot (A1)+cot (A2)).
It is necessary to be noted that ultrasound image described in the present embodiment is in the positive sagittal bit scan in puerpera perineum position
The image in utero obtained.In stages of labor, upper margin of pubic bone, shame can be shown simultaneously from the ultrasound image that this position is scanned
Synostosis lower edge and fetal head profile.Specifically it can refer to text: Tutschek B, Braun T, Chantraine F, et al.A
study of progress of labour using intrapartum translabial ultrasound,
assessing head station,direction,and angle of descent.[J].Bjog An
International Journal of Obstetrics&Gynaecology,2011,118(1):62.This article use experiments have shown that
The relationship of pubis upper limb, lower margin of pubic bone and fetal head profile can be used to calculate fetal head position, Wen Zhongye in ultrasound image
This corresponding relationship is given, similar to " precognition the constraint relationship " described in the present embodiment.
It should be pointed out that the present embodiment measurement fetal head position and the something in common of this article the method are, it is all benefit
Fetal head position is calculated with the relationship of pubis upper limb, lower margin of pubic bone and fetal head profile in ultrasound image, this is by examination
Verify it is bright, have certain clinical reference value.The present embodiment measures in place of the difference of fetal head position and this article the method
It is, the present embodiment the method does not need the angle of lower edge line on measurement fetal head profile and pubis, can be more simple
It determines fetal head position: only needing to obtain the coordinate of upper margin of pubic bone, lower margin of pubic bone in ultrasound image, system is according to pre-
It navigates curve if relationship is drawn with graduated stages of labor, fetal head profile and the stages of labor scale corresponding to the intersection point of curve that navigates are
Fetal head position.There is the present embodiment the method widely operability, user to be easier to grasp.Moreover, in the step (A2)
" precognition the constraint relationship " can also continue to correct by clinic, such as the puerpera of different heights, different regions, using different
" precognition the constraint relationship ", improves the accuracy of fetal head position measuring and calculating.
Preferential, the guiding point quantity is 11, in step (B2), the scale numerical value of the guiding point is followed successively by-
5、-4、-3、-2、-1、0、+1、+2、+3、+4、+5。
Preferential, each adjacent guiding point is equally divided into 10 scales, span 0.1.
Clinically fetal head position representation method is: being mark with ischial spine plane, when the flat ischial spine of fetal head skull minimum point
When, it being denoted as " 0 ", when ischial spine plane above 1cm, is denoted as "+1 ", it is denoted as " -1 " when 1cm below ischial spine plane, and so on.
Usual situation is -5~+5, and for more accurate expression fetal head position, each adjacent guiding point is equally divided into 10 again by the present embodiment
A scale, span 0.1.
Referring to shown in Fig. 2, rectangle frame indicates ultrasound image, and the curve with scale (- 5~+5) is stages of labor navigation curve,
Dotted ellipse shape indicates fetal head profile T in figure, and the intersection point of fetal head profile T and stages of labor navigation curve is M, to illustrate in scheming, intersection point M
Between scale+1 and+2, then fetal head position is about+1.2.
The present embodiment also provides a kind of fetal head position measuring and calculating device, which is characterized in that obtains module, spy including ultrasonic imaging
Sign point mark module and data processing module；
The ultrasonic imaging obtains module for obtaining target ultrasound image, shows pubis in the target ultrasound image
Upper and lower edge and fetal head profile；
The characteristic point mark module for marking the upper and lower edge of pubis is also used to that the fetal head profile is marked to lead with stages of labor
The intersection point of boat curve；
The data processing module is used to successively calculate guiding point in the target ultrasound image according to precognition the constraint relationship
On coordinate, and be sequentially connected the guiding point on the target ultrasound image, generate stages of labor and navigate curve, finally according to institute
State fetal head profile and stages of labor navigation curve intersection point the stages of labor navigation curve on scale, determine fetal head position.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (7)
1. a kind of generation method of stages of labor navigation curve, which comprises the following steps:
(A1) upper margin of pubic bone, the coordinate of lower margin of pubic bone on the ultrasound image are obtained；
(A2) according to precognition the constraint relationship, coordinate of the guiding point on the ultrasound image is successively calculated；
(A3) it is sequentially connected the guiding point on the ultrasound scan planes, generates stages of labor navigation curve.
2. the generation method of stages of labor navigation curve according to claim 1, which is characterized in that the precognition the constraint relationship is:
The triangle that the ultrasound scan planes epipubis joint upper limb, lower margin of pubic bone and any one of guiding point are constituted
Three interior angle angles are precognitions；
According to precognition the constraint relationship, calculating the guiding point in the step of coordinate on the ultrasound image includes:
If the coordinate of the ultrasound image epipubis joint upper limb, lower margin of pubic bone is (x1, y1), (x2, y2), precognition respectively
The two of them interior angle angle of the triangle be A1, A2, the then coordinate (x3, y3) of the guiding point are as follows:
X3=(x1*cot (A2)+x2*cot (A1)+y1-y2)/(cot (A1)+cot (A2))；
Y3=(y1*cot (A2)+y2*cot (A1)+x2-x1)/(cot (A1)+cot (A2)).
3. the generation method of childbirth lead curve according to claim 1, which is characterized in that the guiding point at least 11
It is a.
4. a kind of fetal head position measuring method, which comprises the following steps:
(B1) it is generated on the ultrasound image using the described in any item stagess of labor of claims 1 to 33 navigation curve generation method
Stages of labor navigation curve；
(B2) it is sequentially allocated each guiding point scale numerical value；
(B3) in the ultrasound image, fetal head profile scale corresponding with the childbirth intersection point of lead curve, as fetal head position.
5. fetal head position measuring method according to claim 4, which is characterized in that the guiding point quantity is 11,
In step (B2), the scale numerical value of the guiding point is followed successively by -5, -4, -3, -2, -1,0 ,+1 ,+2 ,+3 ,+4 ,+5.
6. fetal head position measuring method according to claim 5, which is characterized in that each adjacent guiding point is equally divided into 10
A scale, span 0.1.
7. a kind of fetal head position calculates device, which is characterized in that obtain module, characteristic point mark module sum number including ultrasonic imaging
According to processing module；
The ultrasonic imaging obtains module for obtaining target ultrasound image, shown in the target ultrasound image on pubis,
Lower edge and fetal head profile；
The characteristic point mark module is also used to that the fetal head profile and stages of labor is marked to navigate bent for marking the upper and lower edge of pubis
The intersection point of line；
The data processing module is used to successively calculate guiding point on the target ultrasound image according to precognition the constraint relationship
Coordinate, and the guiding point is sequentially connected on the target ultrasound image, stages of labor navigation curve is generated, finally according to the tire
Scale of the intersection point of head contour and stages of labor navigation curve on stages of labor navigation curve, determines fetal head position.
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| CN110507362A (en) * | 2019-09-09 | 2019-11-29 | 邹金沙 | A kind of production axis construction method, fetal head position measurement method and device |
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