Most parents who went through a difficult labor remember the sound of the fetal monitor. The rhythmic beeping told everyone in the room how the baby was doing. They remember it changing, or nurses moving faster, or a doctor appearing with a different tone of voice. What many don’t know is that the tracing running through that machine is a legal record, and in a birth injury case it can become the most detailed piece of evidence in the file. James Wood, founder of James Wood Law and a Board Certified Trial Lawyer certified in civil trial law by the National Board of Trial Advocacy, has spent decades working through exactly this kind of medical evidence on behalf of New Mexico families.
Understanding what that strip shows, how long New Mexico law requires hospitals to keep it, and what procedural steps govern getting it into a claim isn’t something most parents have reason to know. But if your child was seriously injured during labor and delivery, these details matter more than almost anything else in the early stages of evaluating your situation.
Contact our New Mexico birth injury lawyer; reach out to our team at (888) 579-3866.
What the Fetal Heart Monitoring Strip Actually Records
Electronic fetal monitoring (EFM), also called cardiotocography (CTG), tracks two things simultaneously: the baby’s heart rate and the mother’s uterine contractions, producing a continuous printed or digital tracing throughout labor. Monitoring can be external, using a belt with a Doppler sensor placed on the mother’s abdomen, or internal, using a fetal scalp electrode attached directly to the baby’s head and a uterine pressure catheter for more precise readings when the external signal isn’t clear.
The American College of Obstetricians and Gynecologists (ACOG) classifies tracings using a three-tier system. A Category I tracing is normal and reassuring. A Category II tracing is indeterminate. It doesn’t confirm fetal well-being but doesn’t clearly indicate compromise either, and it requires continued evaluation. A Category III tracing is abnormal, associated with fetal acidemia (a dangerous drop in blood pH indicating oxygen deprivation), and requires prompt intervention. The category of a tracing at any given moment during labor, and what the care team did next, becomes a central question in a birth injury case.
Why the Strip Becomes Central Evidence in a Claim
The tracing produces a minute-by-minute timeline. When that timeline is laid alongside nursing notes, medication administration records (including any use of Pitocin, a drug that intensifies contractions and affects fetal heart rate), and the documented timing of delivery decisions, it becomes possible to reconstruct how long warning signs were visible before anyone intervened. Patterns like late decelerations (drops in the baby’s heart rate that occur after a contraction peaks, suggesting insufficient oxygen exchange) and prolonged bradycardia, a sustained drop below 110 beats per minute, can indicate that the baby was in distress while the clinical record shows no change in management.
Expert witnesses are essential in this work. An experienced physician or nurse midwife can review the full tracing and offer an opinion on whether the care team’s response met the applicable standard of care. That standard isn’t perfection; it’s the level of care a reasonably skilled provider in the same field would have delivered under the same circumstances. The evidentiary question doesn’t hinge on whether the tracing was abnormal. It turns on what the medical team did after warning signs appeared, and how long they waited to do it.
Conditions like hypoxic-ischemic encephalopathy (HIE), a type of brain injury caused by oxygen deprivation around the time of birth, are often at the center of the most serious birth injury claims. A tracing showing prolonged Category III patterns prior to a delayed delivery decision can become the core of that argument, but only if the record is complete and properly obtained.
How Long These Records Must Be Kept in New Mexico
Under NMSA 14-6-2, New Mexico hospitals must retain all records relating to a patient’s care and treatment for 10 years following the patient’s last discharge. For minor patients, the rule is more protective: New Mexico Administrative Code 16.10.17.10 requires that records for minors be kept until the patient turns 21. For a child injured at birth, that means every record related to the delivery (including the fetal monitoring strip) must be preserved until at least age 21. Families evaluating a birth injury don’t face the same destruction deadlines that adult malpractice patients sometimes race against.
Records may be destroyed only in the ordinary course of business, not selectively. A hospital can’t discard a single patient’s tracing while retaining others of the same age. Electronically stored and microfilmed copies are treated as originals under New Mexico’s rules of evidence, so the format doesn’t diminish evidentiary value. When a tracing is missing or incomplete, that absence itself becomes a fact the case has to address. Some electronic monitoring systems generate audit trails showing when data was accessed, modified, or deleted, and those trails can matter as much as the tracing itself.
Getting the Record Into a New Mexico Birth Injury Claim
New Mexico’s medical malpractice statute of limitations, set out in NMSA 41-5-13, gives injured patients three years from the date of the alleged malpractice to file a claim. For minors, that window extends further: under the current statute, a minor has one year from reaching the age of majority (meaning until age 19) to commence an action. That extension matters for birth injury families, but it isn’t a reason to wait. Thorough review and record gathering take time, and memories of the clinical setting fade.
Claims Against Independent Providers
When a claim is brought against a qualifying independent provider under the New Mexico Medical Malpractice Act, it can’t be filed in court until an application is first submitted to the New Mexico Medical Review Commission. That application must include authorization for the commission to obtain the patient’s medical records, including the fetal monitoring strip. The commission convenes a panel to review whether there’s substantial evidence that the care fell below the standard of care. That process adds a pre-suit step that affects both the timeline and the document strategy early in the case.
Claims Against Hospital-Employed Staff
Since July 1, 2021, hospitals and outpatient health care facilities no longer participate in Medical Review Commission review. The change came through New Mexico HB 75 (2021), amending NMSA 41-5-3 and 41-5-14. Most labor and delivery care takes place in a hospital setting, and most of those providers are hospital employees. If your claim names hospital-employed labor and delivery nurses, hospitalists, or employed obstetricians, it follows a different pre-suit path and the Medical Review Commission step doesn’t apply. Whether a particular provider was genuinely independent or functioning as a hospital employee is a factual question that can affect the entire procedural posture of the case.
What to Do Before Questions Get Harder to Answer
The value of a fetal heart monitoring record as evidence depends almost entirely on when it gets requested and reviewed. A strip reviewed shortly after a birth injury, while nursing staff can still be deposed about what they saw and how they responded, carries more weight than one pulled years later when memories have faded and the clinical picture has to be reconstructed from documents alone. Gaps in the tracing, missing time stamps, or discrepancies between the strip and the nursing notes become harder to investigate the longer they sit unexamined.
At James Wood Law, we review fetal monitoring records and the full delivery file for Albuquerque families and clients throughout New Mexico on a contingency basis.
If you have questions about a birth injury in New Mexico and want to understand what the medical record might show, reach out to our team at (888) 579-3866.