# Situation: The nurse supervises barangay nutrition scholars (BNS) and barangay health workers (BHWs) during growth monitoring and child health activities for children under 5 years of age. A barangay health worker measures the length of an 18-month-old on a length board. In what order should the steps be done? 1. Hold the child's head against the fixed headboard, eyes looking straight up 2. Remove the child's shoes, socks, and hair ornaments 3. Straighten the legs and slide the footboard firmly against the heels 4. Read and record the length to the nearest 0.1 cm

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=629635  
> language: ko  
> subject: Nursing Practice II — Maternal and Child Health Nursing

## 문제

Situation: The nurse supervises barangay nutrition scholars (BNS) and barangay health workers (BHWs) during growth monitoring and child health activities for children under 5 years of age.

A barangay health worker measures the length of an 18-month-old on a length board. In what order should the steps be done?
1. Hold the child's head against the fixed headboard, eyes looking straight up
2. Remove the child's shoes, socks, and hair ornaments
3. Straighten the legs and slide the footboard firmly against the heels
4. Read and record the length to the nearest 0.1 cm

## 보기

1. 2, 1, 3, 4 **✔ 정답**
2. 1, 2, 3, 4
3. 2, 3, 1, 4
4. 1, 3, 2, 4

**정답: 1**

## 해설

Children under 2 years are measured lying down, crown to heel, with the legs fully extended. Shoes and hair ornaments are removed first because they change the reading. The head is then held against the fixed headboard, the legs are straightened and the footboard brought to the heels, and the length is read and recorded at once.

## 심화 해설

Clinical context: recumbent length measurement for children under 2 years

For children younger than 24 months, length is measured in the supine (recumbent) position using a length board, not standing height. The measurement is taken from the crown to the heels with the legs fully extended. Accuracy matters because length is a primary indicator of nutritional status and growth in this age group, and it directly influences clinical decisions such as feeding adjustments or referral for further evaluation.

The correct sequence begins with removing items that artificially alter the measurement—shoes, socks, and hair ornaments—before positioning the child. Shoes add height at the heel, socks can reduce friction and allow the foot to slide inconsistently, and hair ornaments or bulky hairstyles prevent the crown from resting flush against the fixed headboard. Removing these first ensures the child’s actual body endpoints contact the board.

Once the child is undressed appropriately, the head is stabilized. The head must be held firmly against the fixed headboard with the eyes looking straight up, aligning the external auditory meatus and the lower margin of the orbit in the same vertical plane—the Frankfort plane. This positioning prevents flexion or extension of the neck, which would shorten or lengthen the reading.

After the head is secured, the legs are straightened and the movable footboard is slid firmly against the heels. The soles of the feet should be flat against the footboard, with the toes pointing upward. The reading is then taken immediately and recorded to the nearest 0.1 cm.

Watch out! The order is not interchangeable: positioning the head before removing shoes or hair ornaments means the child may need repositioning after those items are removed, introducing error. Similarly, straightening the legs before securing the head allows the body to shift, making the crown-to-heel distance inaccurate.

Key point! For children under 2 years, recumbent length is used; for children 2 years and older who can stand, standing height is measured. The 0.1 cm precision applies to both, but the positioning steps differ.

| Step order | Action | Rationale |
| --- | --- | --- |
| 1 | Remove shoes, socks, and hair ornaments | Eliminates artificial additions to length and allows proper crown contact |
| 2 | Hold head against fixed headboard, eyes looking straight up | Stabilizes the crown endpoint and aligns the Frankfort plane |
| 3 | Straighten legs and slide footboard firmly against heels | Fully extends the body and fixes the heel endpoint |
| 4 | Read and record length to nearest 0.1 cm | Immediate recording reduces recall error and ensures precision |

The evidence from neonatal intensive care settings reinforces why standardized technique with a length board is preferred over less reliable methods such as tape measure. In a study comparing tape measure and length board measurements in 108 infants, the length board provided more consistent and accurate readings, supporting its use as the reference method for recumbent length [1]. Although that study focused on NICU infants, the principle transfers directly to community growth monitoring: a rigid board with fixed and movable components reduces the variability introduced by flexible tapes or inconsistent body positioning. For an 18-month-old measured by a barangay health worker, following the board-based sequence—undress, position head, extend legs, read—maximizes reliability across different measurers and visits.

Key point! In community settings where multiple health workers rotate, consistent technique is essential for tracking growth trends over time. A measurement error of even 0.5 cm can shift a child across growth chart percentile lines, potentially triggering unnecessary referrals or masking true growth faltering.References (research sources)

- [1]Comparison of Infant Length Measurements Using Tape Measure Versus Length Board.Research articleRibeiro DS, Sasinski J, Hackett H, Manalo C, Choi J, Miller PS (2023) · DOI: 10.1097/ANC.0000000000001098

## 임상 시나리오

Recumbent Length Measurement for Children Under 2Correct sequencing for accurate crown-to-heel length
First remove shoes, socks, and hair ornaments because they artificially change the measurement. Then hold the child's head firmly against the fixed headboard with eyes looking straight up, aligning the Frankfort plane. After the head is secure, straighten the legs and slide the footboard firmly against the heels. Read and record length to the nearest 0.1 cm immediately.

CautionDo not measure standing height for children under 24 months. Inaccurate positioning of the head or failure to remove hair ornaments can falsely shorten or lengthen the reading, leading to incorrect growth assessment.

## 핵심 개념

- **recumbent length** — Length measured with the child lying supine on a length board, used for children under 24 months.
- **Frankfort plane** — Imaginary line from the lower margin of the orbit to the external auditory meatus, kept vertical during head positioning.
- **length board** — Device with a fixed headboard and movable footboard used to measure recumbent length accurately.
- **crown-to-heel** — Measurement from the top of the head to the bottom of the heel with legs fully extended.
- **growth monitoring** — Regular measurement of growth indicators such as length to assess nutritional status and child health.

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