Very cold in the ICU and unable to speak: how to signal distress when a breathing tube is in place

When to call the bedside nurse now

If the person is already in an ICU, call the bedside nurse now for hard shivering with fever, severe breathlessness, chest pain, new drowsiness, new confusion, or a blood pressure the team says has moved out of that person’s range. Do not wait for the next round, and do not let a visitor adjust a tube, a line, or the ventilator.

If the person is not yet in a hospital and has severe breathlessness, chest pain, drowsiness, or new confusion, call 1669 in Thailand. Feeling cold after a bed bath, without those signs, is not by itself a reason to call from a temperature number alone.

Short answer

A person on a ventilator in intensive care may be unable to speak and can still signal needs. No one method fits everyone. A bed bath can lower measured temperature. Feeling cold is not fever or an abnormally low temperature. Do not adjust the breathing tube or the ventilator yourself.

Before talking with the team

Write down a yes signal and a no signal the person can still make, and the words to ask often, such as cold, pain, and breathlessness.

Prepare a way to communicate when speech is not possible

ICU rooms are not set to one temperature

This session did not open a study that sets one cold room temperature for every ICU to prevent infection, so this page does not say that. Feeling cold is not explained by the room thermostat alone. It also involves the person’s condition, uncovered skin, water on the skin, medicines, fever, and any temperature plan the team is already using. If the person is cold, say when it started. Do not treat one hallway setting as the rule for every unit.

A bed bath can lower the measured temperature

An ICU observation of 21 people recorded 97 night bed baths and 95 day bed baths. Body temperature fell in both periods. The night median was 37 degrees Celsius before the bath, with a span of 36.6 to 37.4, and 36.6 after, with a span of 36.2 to 37.2. The day median was 36.9 before, span 36.5 to 37.2, and 36.7 after, span 36.2 to 37.2. Those are group medians, not a drop that one body will repeat every time. That study did not use shivering as its main result.

A 2021 crossover trial in 50 critically ill adults compared a water bed bath with a dry bed bath. Mean axillary temperature at the end was 36.12 degrees after the water bath and 35.92 degrees after the dry bath, lower than at the start. Tympanic temperature did not change in a statistically significant way. The authors wrote that the measured values stayed in the range that paper called normal, so they could not say the bath caused hypothermia. A fall in axillary temperature was still something the nursing team should watch.

Feeling cold is not one disease name

Tell the team more than the word cold. Say whether it started after the bath or before, how long it lasted, whether the whole body shook, what temperature was measured and where, and whether fever, pain, or breathlessness came with it. Discomfort from the bath and shivering that the team must investigate are different layers. Visitors do not change the bath themselves. They can ask whether the team can change the timing, how much skin is uncovered, or how warmth is added.

Being unable to speak is not having nothing to say

Cabrini and colleagues, in Minerva Anestesiologica, June 2025, reviewed studies through August 2024 and included 42. They wrote that an artificial airway that leaves an ICU patient voiceless is stressful for patients, families, and caregivers, and that no single communication aid was adequate for every patient. High-tech tools helped but brought technical problems and training needs. Low-tech aids were easier to start and were sometimes not enough for complex needs. The choice depends on that person’s abilities.

Fonseca and colleagues, in Australian Critical Care, published online on 18 April 2026, mapped 16 studies in adults on mechanical ventilation. They grouped augmentative and alternative communication into three layers. Unaided methods use the body, including gesture, facial expression, lip reading, and head nods for yes and no. Low-tech methods include communication boards, alphabet boards, and pen and paper. High-tech methods include tablet software and gaze-controlled systems. The review reported links, in the studies it mapped, with less anxiety, comfort, communication, and satisfaction. Barriers were patient limits, thin staff training, and device limits. Facilitators were a tool fitted to the person, family involvement, and support from the unit. The review did not crown one method for every study.

A 2024 scoping review in the American Journal of Speech-Language Pathology found small-to-large effects in mapped studies of no-tech and high-tech visual interfaces and of nurse training. The reported outcomes included anxiety, satisfaction with communication, comfort, and symptom reporting. Those effect sizes are not the result for the person in the bed now.

Match the channel to what the person can still do

Ask one short question at a time. Cold? Pain? Breathless? Thirsty? A position change? Afraid, or not yet clear what is about to happen? Head nodding is one unaided method recorded in the 2026 review. Before it becomes the main channel, the team should see that yes and no still mean the same thing, because weakness, fatigue, and vision can change an answer. Writing helps when the hand can move. The same review says a weak hand, blurred vision, and fatigue can make writing hard.

Boards that mix pictures, words, and letters were described, in studies the 2026 review gathered, as a format some critically ill patients used quickly, with fewer negative feelings. Cabrini still concluded that no single tool fits everyone. Gaze-controlled systems have been studied in ventilated patients, including one comparison with a board in 44 people and one observation of 11. They are not in every ICU, and they do not work if the person cannot control gaze.

A board for this person should hold the needs that come up often. Mapped studies mentioned pain, suctioning, and repositioning. This page also lists cold, heat, breathlessness, thirst, toileting, fear, sleep, and a request to hear what is about to be done. Those are questions for the team. They are not endpoints that every study measured in the same way.

Family prepares the channel and does not replace every answer

The 2026 review lists family involvement among the things that help a communication tool get used. Family can say whether glasses are needed, whether hearing is clear, which language is easiest, which gesture the person already uses, and which short words the household uses. When the person can still answer, the answer about pain, cold, or breathing should come from the person’s signal. Family adds context. Family does not replace that answer every time.

If wakefulness or attention changes newly, tell the team. Do not call that refusal. This page did not open a full delirium guideline, so it does not teach how to separate types of confusion.

Questions before agreeing a channel

How awake is the person, and how well do they follow a question?
Which yes signal and no signal still stay stable?
Can the head, hand, finger, or eyes move?
Are letters or pictures clear to look at?
Is hearing clear, or is a hearing aid needed?
Is a word board or an alphabet board available?
If the hands cannot move, is gaze pointing or eye-tracking available in this unit?
Which symptoms should be asked again, such as pain, cold, breathlessness, and thirst?
Did the cold start before or after the bed bath?
What temperature was measured during the cold feeling, and where?
Is there shivering or fever as well?
How can the team change warming or the timing of the bath?
How can the family prepare words or pictures this person uses often?
Has wakefulness changed, and how will the team look at delirium?
Which symptoms mean calling the nurse now?

What family can bring

Glasses, and a hearing aid if one is used
Short words the household uses, and the language that is easiest
The yes signal and no signal the person can make
Pictures of basic needs, and symptoms the person often has, including chronic pain or an existing illness
Something that has been calming, such as a familiar voice or a touch the unit allows
Whether confusion has happened before

Different problems, different tries

Problem	What to try with the team	What to watch
Cannot speak but can nod	Short yes or no questions, one at a time	See that the signal still means the same thing
The hand can move	Writing or pointing to a board	Weakness, blurred vision, or fatigue can stop writing
The hand cannot move but the eyes can	A board placed for gaze, or eye-tracking if the unit has it	It must sit in the line of sight, and not every unit has it
Vision is unclear	Spoken yes or no questions	Check hearing and a hearing aid
Attention is short or confusion is new	One short question at a time	Tell the team. Do not call it refusal
Cold after a bed bath	Say when it started, whether there is shivering, and the measured temperature	Do not decide that every ICU air setting is the cause
Breathing feels wrong	Call the nurse now	Do not adjust the tube or the machine

How the author ordered this page

Asst. Prof. Dr. Norawit Raatpiboon kept two layers apart. The temperature layer comes from bed-bath studies, which measured a fall and, in the 2021 trial, did not conclude that the bath caused hypothermia. The voice layer comes from the 2025 and 2026 reviews, which found no single communication tool for a person who cannot speak and asked for a choice based on what that person can still do.

Tracheostomy humidity and tube blockage is a Thai page about the airway of a tracheostomy tube, not about how to say one is cold when speech is not possible.

Questions people ask

Why can an ICU stay feel very cold?

Feeling cold can come from several things at once, including the room, uncovered skin during a bath, water on the skin, medicines, and the person’s condition. This page has no evidence that every ICU is set cold for the same reason.

Must an ICU always run cold air?

No study opened this session says every unit must be cold to prevent infection. Room temperature differs by place. If the person is cold, tell the team when it started. Do not treat one unit as the rule for all.

Can a bed bath lower temperature?

Yes, in the studies opened here. The 21-person study found a fall by day and by night. The 50-person study found a lower axillary temperature, and the authors did not conclude that this was hypothermia. Tympanic temperature in that study did not change in a significant way.

How can a person with a breathing tube tell the nurse something?

Agree a yes signal and a no signal, use one short question at a time, or point to a board. Cabrini found no tool that fits everyone. The choice depends on wakefulness, vision, hearing, and whether a hand can move.

Can a nod be the answer?

Nodding and shaking the head are unaided methods recorded in the 2026 review. The team should see that the signal still means the same thing before it becomes the main channel.

What is a communication board?

It is a low-tech tool with symbols, letters, pictures, or words that the person or the team can point to. Mixed boards were described in gathered studies. A board does not replace checking whether this person can point.

What if writing is not possible?

The 2026 review says a weak hand, blurred vision, and fatigue can make writing hard. Other options are yes or no questions, gesture, or gaze pointing if vision allows.

Can eye-tracking be used in an ICU?

Studies in ventilated patients found it usable when gaze could be controlled, including a comparison with a board in 44 people and an observation of 11. It is not in every unit, and it does not work if gaze cannot be controlled.

How far can family speak for the person?

Family can describe glasses, hearing, language, and the gesture the person already uses. The review lists family among the things that help a tool get used. When the person can still answer, the answer about symptoms should come from the person.

When is cold more than discomfort from a bath?

Call the nurse now for shivering with fever, severe breathlessness, chest pain, drowsiness, new confusion, or a blood pressure the team says has moved. The bed-bath studies opened here did not use the word cold alone as that threshold.

Does new confusion mean the person is refusing?

Do not call it that. If wakefulness changes, tell the team. This page did not open a full delirium guideline, so it does not teach how to separate types of confusion.

Can the team explain a task before touching the body?

Yes. If the person can still follow, a short line about a bath, a turn, or suction, and which signal means distress, uses the same channel. Visitors do not adjust the equipment instead of the team.

Sources opened this session

A full delirium guideline was not opened this session, and no study that sets one ICU room temperature for every hospital was opened.

What this page does not do

This page is general information from sources opened this session. It does not examine one person, and it does not tell a visitor to adjust a tube, a line, or a ventilator. If the person is already in an ICU and a sign in the first box is present, call the bedside nurse. The author is Asst. Prof. Dr. Norawit Raatpiboon.