Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

OBSTETRICS II > 1.06 Dystocia - Passageway > Flashcards

1.06 Dystocia - Passageway Flashcards

1
Q

T/F: A Cephalopelvic disproportion usually warrants a CS delivery

A

T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

This bony landmark corresponds to the midplane, which is the narrowest plane in the bony pelvis

A

Ischial spine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Ischial tuberosity is used to assess what?

A

Outlet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The (true/false) pelvis is the area above the linea terminalis

The (true/false) pelvis is the area below the linea terminalis

What are the 4 divisions of the true pelvis?

A

FALSE- above
TRUE - below

4 divisions: pelvic inlet, midplane, pelvic outlet (obstetrical outlet), pelvic plane of the greatest dimension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

where is the pelvic inlet?

A

It spans from the superior border of the symphysis pubis to the level of sacral promontory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the obstetrical outlet?

A

The distance between the two ischial tuberosities

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

An outright cesarean section is only performed for certain fetal sizes or when the estimated fetal weight is:

A

more than 4,500 g

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

T/F: Radiologic pelvimetry is often done

A

F
-not often done, unless the px wants to undergo trial of labor but the fetus is in breech position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What position is desired for a fetus to be delivered vaginally?

A

Occiput anterior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Why is occiput posterior (6 o clock position) not ideal?

A

Since the frontum will hit the maternal pubic bone and prevent flexion and descent, unless it is much smaller size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

T/F: An epidural anesthesia is ideally needed in clinical pelvimetry

A

T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How to compute for the obstetrical conjugate?

What is the adequate pelvic inlet?

How to compute for the true conjugate?

A

Obstetrical conjugate = Diagonal conjugate - 1.5 to 2cm

> 11.5cm

True conjugate = Diagonal conjugate - 1-1.5cm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

T/F: The retropubic angle can be assessed if the head is engaged

A

F- done if head is NOT yet engaged

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Shapes of retropubic angle

What is the preferred shape?

A

Shapes: round, angulated, narrow, wide

Preferred: wide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the Mueller-Hillis Method?

A

an old method when the OB attempts to reposition the head of the fetus during IE, guiding it into the pelvic inlet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Usual dimension of the midplane

How do you crude estimate the midplane?

Indication of <10cm midplane distance

A

10-10.5 cm

-Palpate the prominence of the ischial spines and measure the distance between them

If <10cm, it could be abnormal/contracted

15
Q

What is head engagement?

A

When the biparietal diameter of the fetus has reached the pelvic inlet and/or surpassed the linea terminals -> now in the true pelvis

16
Q

T/F: Engagement means the head is at station 0

A

F
In protracted labor, the head might be engaged but can have caput -> the station can be lower than station 0

17
Q

In gynecoid:

The ischial spines are (prominent/not prominent)
Sacral promontory is (reached/not reached)
Inlet is (adequate/inadequate)

A

In gynecoid: (round shape)

The ischial spines are NOT PROMINENT
Sacral promontory is NOT REACHED (>11.5 CM)
Inlet is ADEQUATE

18
Q

In Android:

The ischial spines are (prominent/not prominent)
Sacral promontory is (reached/not reached)
Inlet is (adequate/inadequate)

A

In android (heart shaped):

The ischial spines are PROMINENT
Sacral promontory is REACHED
Inlet is INADEQUATE (ALL MEASUREMENTS ARE INADEQUATE)

19
Q

In Anthropoid:

The ischial spines are (prominent/not prominent)
Sacral promontory is (reached/not reached)
Inlet is (adequate/inadequate)

A

In Anthropoid (Narrow oval shape)

The ischial spines are PROMINENT
Sacral promontory is NOT REACHED
Inlet is ADEQUATE

20
Q

in Platypelloid:

The ischial spines are (prominent/not prominent)
Sacral promontory is (reached/not reached)

A

IN PLATYPELLOID (FLAT OVAL SHAPE):

The ischial spines are NOT PROMINENT (Blunt)
Sacral promontory is REACHED

21
Q

What pelvic types have narrow bispinous diameter?

What pelvic types have wide bispinous diameter?

A

Narrow (<10cm): Android, anthropoid
Wide (>10cm): Platypelloid

22
Q

This way of assessing the midplane measures the hollow area in the posterior border of the ischial spine

A

Sacrosciatic Notch

23
Q

What is the sequence in doing clinical pelvimetry

A

Upon doing hand shape form of hand, first assess the inlet by:

-assessing the retropubic angle (assesses if smooth, angulated in relation to the pelvic type)
- assessing the prominence of ischial spine (will determine pelvic type)

PRonate hand
- assess the sacrosciatic notch (determines if wide or narrow)
- Assess curvature of sacrum

24
Q

How do you assess sacral curvature?

Interpret curved finding and flat finding

A

Place 2 pronated fingers to pelvis and slide downwards

Curved- normal
Flat- android/male pelvis

25
Q

What are the ways to assess the midplane?

A

through the assessment of:
Ischial spine
Suprasciatic notch
Curvature of sacrum
Pelvic sidewall

26
Q

Finding of pelvic sidewalls if ischial spine and ischial tuberosity are in line

A

Parallel

27
Q

Finding of pelvic sidewalls if ischial spines are MEDIAL to the and ischial tuberosity

A

Convergent

28
Q

Finding of pelvic sidewalls if ischial spines are LATERAL to the and ischial tuberosity

A

Divergent

29
Q

What is the use of clinical pelvimetry?

A

This will serve as a guide in deciding whether or not to extend the labor or do CS

30
Q

T/F: Prominent ischial spines, narrow sacrosciatic notch, and flat sacrum may indicate contracted midplane

A

T

31
Q

How to measure the bituberous diameter?

Normal diameter:

T/F: Wide pelvic outlets are considered INADEQUATE

A

Position your closed fist OUTSIDE the perineum, with the mother in the dorsal lithotomy position

Normal: 8cm (Adequate outlet)

F- it is considered adequate since it is >8cm

32
Q

This is the angle formed by the convergences of the borders of the inferior aspect of the pubis on both sides

Normal angle:

T/F: A bituberous diameter of <8cm and a narrow subpubic angle DOES NOT indicate a contracted pelvic outlet

A

Subpubic Angle

Normal angle: 90-110 degrees

F- it indicates a contracted pelvic outlet

32
Q

Ways the pelvic outlet is measured

A

Bituberous diameter measurement
Subpubic angle measurement

33
Q

This is the most favorable pelvic type

Most restricted pelvic type

T/F: all parameters in an android pelvic type are NORMAL, same with GYNECOID

A

most favorable: gynecoid
Most restricted: Android

F - android has all abnormal parameters. Gynecoid has normal

34
Q

T/F: Engagement is possible only in occiput posterior position in Anthropoid pelvis

T/F: The anterior portion of the pelvis determines the shape of the pelvis

A

T- OP can be delivered vaginally in an extremely small baby

F- it’s the posterior portion of the pelvis that dictates. The tendency is dictated by the anterior portion

35
Q

Pelvic type that has round retropubic angle, non prominent ischial spines, flat sacrum

A

Mixed type: Android Type with Gynecoid Tendency

OBSTETRICS II (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions