2. What is First Aid?What is First Aid?
Webster’s says: “Emergency treatmentWebster’s says: “Emergency treatment
for injury etc, before regular medicalfor injury etc, before regular medical
care is available”care is available”
– Tends to relate best to injuries rather than illnessTends to relate best to injuries rather than illness
What does this mean for us?What does this mean for us?
Why should people know First Aid?Why should people know First Aid?
3. Basic Life Support / CPRBasic Life Support / CPR
A Critical Partner toA Critical Partner to
First Aid TrainingFirst Aid Training
CPR SkillsCPR Skills
– Adult CPRAdult CPR
– Choking skillsChoking skills
– Child and InfantChild and Infant
– Automated External DefibrillatorAutomated External Defibrillator
4. Words to Live By…Words to Live By…
If you remember NOTHING else:If you remember NOTHING else:
– SAFETYSAFETY
AM I SAFE?AM I SAFE?
IS MY PATIENT SAFE?IS MY PATIENT SAFE?
Are Bystanders/other rescuers safe?!Are Bystanders/other rescuers safe?!
– KNOW WHEN YOU ARE IN OVER YOURKNOW WHEN YOU ARE IN OVER YOUR
HEADHEAD
**
5. Assessment In Action…Assessment In Action…
In a nut shell!In a nut shell!
Recognize the EmergencyRecognize the Emergency
Decide whether to HelpDecide whether to Help
– NOTE! You have not “entered” the sceneNOTE! You have not “entered” the scene
yet!yet!
Scene SafetyScene Safety
Call EMS if neededCall EMS if needed
– Still haven’t touched the victim/patientStill haven’t touched the victim/patient
yet!yet!
Assess the VictimAssess the Victim
– OK now you can touch them!OK now you can touch them!
Provide CareProvide Care
**
6. Recognizing the EmergencyRecognizing the Emergency
One of the largest barriers to lendingOne of the largest barriers to lending
aid…aid…
Some ObviousSome Obvious
– Smashed guardrail, broken glass, tire marksSmashed guardrail, broken glass, tire marks
Some well hiddenSome well hidden
– Sleeping on the beachSleeping on the beach
– Someone ‘Acting Strange’Someone ‘Acting Strange’
7. Why should I help?Why should I help?
Good Samaritan ActGood Samaritan Act
– Protection from law suits for renderingProtection from law suits for rendering
aidaid
Duty to Respond for WorkDuty to Respond for Work
– Office Response TeamOffice Response Team
EthicalEthical
– If not you, then who?If not you, then who?
– What if it was Grandma?What if it was Grandma?
NOTE: No one can FORCE you to render aid when your
safety is at risk!!! There may be circumstances when you
should NOT render aid!
8. When NOT to Help!When NOT to Help!
Unable to access victimsUnable to access victims
Your safety is at riskYour safety is at risk
– Risk of fire, explosionRisk of fire, explosion
You have kids in the car!You have kids in the car!
You are ‘medicated’ or otherwiseYou are ‘medicated’ or otherwise
impairedimpaired
The list goes on…The list goes on…
9. SAFETYSAFETY
RoadwaysRoadways
Power LinesPower Lines
Poisons /ChemicalsPoisons /Chemicals
Fire ExplosionFire Explosion
Other PeopleOther People
““Mechanism”Mechanism”
Number of injuredNumber of injured
HazardsHazards
Remember! You are NO good to anyone if you becomeRemember! You are NO good to anyone if you become
injured while trying to render aid!injured while trying to render aid!
12. When to call 911- The Short ListWhen to call 911- The Short List
Unconscious or Less than Fully ConsciousUnconscious or Less than Fully Conscious
Trouble BreathingTrouble Breathing
– Includes asthma, allergic reactionsIncludes asthma, allergic reactions
Chest Pain, Signs of Stroke or otherChest Pain, Signs of Stroke or other
Medical EmergenciesMedical Emergencies
When you cannot safety transport theWhen you cannot safety transport the
injuredinjured
– Able to wear seatbeltAble to wear seatbelt
– Able to stand and get self into a carAble to stand and get self into a car
Bleeding you cannot controlBleeding you cannot control
When you’re in over your head!When you’re in over your head!
– Can always get a second opinion!Can always get a second opinion!
13. How to Call 911How to Call 911
From CampusFrom Campus
From “The Real Word”From “The Real Word”
From a Cell PhoneFrom a Cell Phone
Information Desired By DispatchersInformation Desired By Dispatchers
– Type of emergency and specific locationType of emergency and specific location
– Number of victims/patientsNumber of victims/patients
– Any threats to responders (ie fire, blockedAny threats to responders (ie fire, blocked
roads)roads)
– Any care given, and any trained rescuersAny care given, and any trained rescuers
– Your name and call back numberYour name and call back number
14. Emergency Medical Services:Emergency Medical Services:
The Players…The Players…
First ResponderFirst Responder
– Often Police / Law Enforcement Officers and FireOften Police / Law Enforcement Officers and Fire
FightersFighters
EMTEMT
– Many Firefighters are becoming EMT certifiedMany Firefighters are becoming EMT certified
– Minimal training level to operate an ambulanceMinimal training level to operate an ambulance
– Trained to handle any emergency at a basic levelTrained to handle any emergency at a basic level
ParamedicParamedic
– Advanced Care ProviderAdvanced Care Provider
– Medications, IV’s, Advanced ProceduresMedications, IV’s, Advanced Procedures
15. How long till help arrives?How long till help arrives?
Typical Urban ResponseTypical Urban Response
– First Responder and Advanced Paramedic AmbulanceFirst Responder and Advanced Paramedic Ambulance
arrival on scene in under 6 minutesarrival on scene in under 6 minutes
– Typically a full time response serviceTypically a full time response service
Typical Suburban ResponseTypical Suburban Response
– First Responder arrival within 6-8 minutesFirst Responder arrival within 6-8 minutes
– Ambulance arrival under 12 minutesAmbulance arrival under 12 minutes
Typical “Rural” ResponseTypical “Rural” Response
– Varies greatly by geographyVaries greatly by geography
– Often First Responders within 10-12 minsOften First Responders within 10-12 mins
– Often ambulance is greater than 15-20 minutesOften ambulance is greater than 15-20 minutes
Maybe as long as 60 minutes and up!Maybe as long as 60 minutes and up!
16. To move or not to move…To move or not to move…
Common sense is neededCommon sense is needed
here…here…
Minor injuries, the patient willMinor injuries, the patient will
make this decision for you.make this decision for you.
More serious cases:More serious cases:
There may be cases where anThere may be cases where an
immediate danger exists to theimmediate danger exists to the
victim of serious accident orvictim of serious accident or
injuries.injuries.
Other than these immediate lifeOther than these immediate life
threats, victims should not bethreats, victims should not be
moved except by EMSmoved except by EMS
– (We’ll cover back woods stuff(We’ll cover back woods stuff
later)later)
17. Spinal injurySpinal injury
Special Care:Special Care:
– When spinal cord / neckWhen spinal cord / neck
injury is suspected:injury is suspected:
– Stabilize the neckStabilize the neck
manuallymanually
– This rescuer is nowThis rescuer is now
engaged and must stayengaged and must stay
with this patient.with this patient.
– Consider some form ofConsider some form of
mechanical stabilizationmechanical stabilization
(i.e. shoes, sandbag)(i.e. shoes, sandbag)
– These are the cases weThese are the cases we
do not want to move!do not want to move!
18. Significant Mechanisms of InjurySignificant Mechanisms of Injury
Falls (2-3x victim’s height)Falls (2-3x victim’s height)
Vehicle collisions involving:Vehicle collisions involving:
– ejectionejection
– roll-overroll-over
– high speedhigh speed
– pedestrianpedestrian
– motorcyclemotorcycle
– bicyclebicycle
Unresponsive or altered mental statusUnresponsive or altered mental status
Penetrations (head, chest, abdomen)Penetrations (head, chest, abdomen)
20. Rescue DragRescue Drag
When dragging patient headfirst, headWhen dragging patient headfirst, head
can tilt and twistcan tilt and twist
Attempt to stabilize as best asAttempt to stabilize as best as
possiblepossible
– Consider a feet first drag in a straightConsider a feet first drag in a straight
line.line.
– If a turn is necessary, make it a gradualIf a turn is necessary, make it a gradual
turnturn
21. The AssessmentThe Assessment
For serious injured victims:For serious injured victims:
– Ensure ABC learned in CPREnsure ABC learned in CPR
– Focus on open airwayFocus on open airway
For Minor to ModerateFor Minor to Moderate
InjuriesInjuries
– Have the victim assist inHave the victim assist in
exposing the injury andexposing the injury and
investigateinvestigate
22. Shock affects areShock affects are
major functions ofmajor functions of
the bodythe body
loss of blood flowloss of blood flow
to the tissues andto the tissues and
organsorgans
Shock must be treated for inShock must be treated for in
all accident casesall accident cases
* SHOCKSHOCK
23. Cuts and BleedingCuts and Bleeding
Common SenseCommon Sense
Most common form of First AidMost common form of First Aid
needed!needed!
1.1. Control BleedingControl Bleeding
2.2. Evaluate for Further careEvaluate for Further care
•MinorMinor
•Clean WoundClean Wound
•AntibioticAntibiotic
Cream/BandageCream/Bandage
•Monitor for infectionMonitor for infection
•MajorMajor
•Control BleedingControl Bleeding
•BandageBandage
•Transport Safely to ERTransport Safely to ER
25. Cleaning WoundsCleaning Wounds
Shallow woundsShallow wounds
1. Wash inside with1. Wash inside with
soap & watersoap & water
2. Irrigate with2. Irrigate with
pressurized waterpressurized water
3. Apply antibiotic3. Apply antibiotic
ointmentointment
4. Cover with4. Cover with
sterile dressingsterile dressing
High risk woundsHigh risk wounds
1. Seek medical care1. Seek medical care
for cleaningfor cleaning
2. Remote location -2. Remote location -
cleanclean
as best you canas best you can
26. Physician Care Needed?Physician Care Needed?
CleanClean high risk woundshigh risk wounds
CloseClose open woundsopen wounds
– 1. Cosmetic, wide, gaping,1. Cosmetic, wide, gaping,
underlying structure injuredunderlying structure injured
– 2. Closure times =2. Closure times =
extremities within 6 hoursextremities within 6 hours
head & trunk within 24 hourshead & trunk within 24 hours
TetanusTetanus booster needed?booster needed?
27. Does it need stitches?Does it need stitches?
General Guide for Stitches:General Guide for Stitches:
– Joints or flexing areasJoints or flexing areas
– Cosmetic: Face or areasCosmetic: Face or areas
where patient appearance is ofwhere patient appearance is of
concernconcern
– Wounds larger than 2cm (1/2Wounds larger than 2cm (1/2
inch) and of significant depthinch) and of significant depth
28. To Stitch or not to stitch?To Stitch or not to stitch?
YESYES
– FACEFACE
– Deep jaggedDeep jagged
cutcut
– Near EyeNear Eye
29. To Stitch or not to Stitch…To Stitch or not to Stitch…
Maybe?!Maybe?!
ShallowShallow
– No cosmeticNo cosmetic
concernconcern
– Limited flexLimited flex
– Moderate-MinorModerate-Minor
infection riskinfection risk
Scrape/cut on forearmScrape/cut on forearm
30.
31. BurnsBurns
Time to be concerned:Time to be concerned:
– SizeSize: 1: 1° burns° burns larger than twice the size of the patient’slarger than twice the size of the patient’s
hand or 2hand or 2°° burns (or worse)burns (or worse) ≥≥ the size of the patient’sthe size of the patient’s
handhand
– TypeType: Chemical, Steam Electrical should all be: Chemical, Steam Electrical should all be
evaluated immediately.evaluated immediately.
– LocationLocation: Face/lungs, Chest, Circumferential: Face/lungs, Chest, Circumferential
TreatmentTreatment
– Cool the Burn!Cool the Burn!
– No ointments, goops, butter or lotions!No ointments, goops, butter or lotions!
– Treat small burns like other wounds- antibiotic creamTreat small burns like other wounds- antibiotic cream
after wound has been cooledafter wound has been cooled
– Any burn meeting the above criteria should beAny burn meeting the above criteria should be
evaluated in ERevaluated in ER
32. InfectionInfection
Minor wounds can become majorMinor wounds can become major
problems!problems!
Signs of Infection:Signs of Infection:
– RednessRedness
– SwellingSwelling
– HeatHeat
– Puss or oozingPuss or oozing
– Red StreaksRed Streaks
33. Sprains Strains and Automobiles…Sprains Strains and Automobiles…
22ndnd
Most frequently used First AidMost frequently used First Aid
Skill!Skill!
Can you tell if an injury is a brokenCan you tell if an injury is a broken
bone or a sprain?bone or a sprain?
35. Sprains Strains and AutomobilesSprains Strains and Automobiles
Often minimal outward signs to tell if aOften minimal outward signs to tell if a
broken bone exists.broken bone exists.
Safest Treatment is to immobilize, andSafest Treatment is to immobilize, and
safely transport to medical facility forsafely transport to medical facility for
further evaluation.further evaluation.
36. Splinting-Splinting-
Any device, manufactured orAny device, manufactured or
improvised that limits (or eliminates!)improvised that limits (or eliminates!)
movement above and below themovement above and below the
injured sight.injured sight.
Two rules to splinting:Two rules to splinting:
– Keep it simpleKeep it simple
– Keep it simpleKeep it simple
37.
38. Serious InjuriesSerious Injuries
Suspected thigh fractureSuspected thigh fracture
SuspectedSuspected
Head injuriesHead injuries
Multiple injuriesMultiple injuries
Loss of ConsciousnessLoss of Consciousness
– Behaving oddlyBehaving oddly
– Sleepy, unable to keep self awakeSleepy, unable to keep self awake
51. Delayed EMS ResponseDelayed EMS Response
What happens when you are waayyyWhat happens when you are waayyy
up north?up north?
– To Move or not to move decisionsTo Move or not to move decisions
How the heck are we gonna get this personHow the heck are we gonna get this person
out of here!out of here!
Risk-Benefit EquationRisk-Benefit Equation
– Likelihood of Risk X HarmLikelihood of Risk X Harm
52. After the emergency…After the emergency…
Wash your hands!Wash your hands!
Follow up care or monitor the injuryFollow up care or monitor the injury
Talk about it!Talk about it!
– It’s good to talk about stressfulIt’s good to talk about stressful
experiences!experiences!
– RNs, MDs, EMTs- talk with someone whoRNs, MDs, EMTs- talk with someone who
knows what it’s likeknows what it’s like
– Talk with someone who will listenTalk with someone who will listen
53. The First Aid KitThe First Aid Kit
Keep it Simple!Keep it Simple!
– Few BandaidsFew Bandaids
– Short roll of tapeShort roll of tape
– Gauze padsGauze pads
– Roller bandageRoller bandage
– Ace WrapAce Wrap
– GLOVESGLOVES
– Ice PackIce Pack
54. First Aid KitsFirst Aid Kits
Simple kits available for ~$10Simple kits available for ~$10
– Pro: simple, comes with case, one stopPro: simple, comes with case, one stop
and doneand done
– Con: often get poor quality suppliesCon: often get poor quality supplies
Fancy Day Trip to Month longFancy Day Trip to Month long
excursion kits availableexcursion kits available
– Pro: One stop and donePro: One stop and done
– Con: Definitely comes with TONS of stuffCon: Definitely comes with TONS of stuff
you’ll never needyou’ll never need
Editor's Notes
WELCOME!
Develop interaction with participants early! Get them to brainstorm what sorts of things make up first aid, who provides first aid, how complex first is (not very!)
Mention that we encourage first aid folks to take CPR and Vice versa
We could talk for HOURS AND HOURS covering every conceivable emergency and still fail to either give you the info you may sometime need OR give you so much that you forget the pearl you really need some day!
The ASTERISK shows you pages to REALLY pay attention to!!!
SEE THE ASTERISK!!
Recognize the emergency can be tough! Is someone just fooling around, or really hurt! Did you really see that slumped over person breath..or not?
Decide whether to act is a very personal decision: SCENE SAFETY
Discuss reasons how you know an emergency exists….the obvious are simple…subtle ones can be trouble try to cater to the class background
Good Samaritan: Minnesota included specifically: CPR, First Aid, Choking, and AED. Generally it provides protection from frivolous lawsuits provided the individual renders care to the best of their abilities without exceeding their training (no pocket knife tracheostomies!)
Minnesota Good Sam also provides a PENALTY for not helping…(which means minimally stopping [ie for MVC] and calling 911) Failing to render aid can be a Petty Misdemeanor!
EMPHASIZE AEDs are covered!
Work…office place response teams (everyone’s gonna graduate…SOME DAY right?!)
ON campus jobs….not a requirement of many jobs (EMTs, Life Guards) PRP/OLC is not specifically listed in the OSHA Exposure plan as a position with expected or designated emergency response. YOU may encounter scenarios where you feel a desire or need or duty to act.
Personal Safety SHOULD be a huge factor in this decision! Keep in mind that personal biases can affect your decisions (inherent racism, indigent, dirty etc) whether they should or not is a whole different course!
Emphasize that it’s great if they want to help….MINIMALLY get additional help…anythign else is great.
Participants should be SICK of us talking about SAFETY by the end of the class!
Reinforce that we should all want to go home and see loved ones after rendering aid! This Ain’t Rescue 911, ER or Third Watch!!
Participants will not know what MECHANISM is…keep discussion of this to a minimum! No need for in depth discussion. “The Forces involved in causing an injury”. Maybe include it’s predictive strength….someone falls from a 20 foot ladder landing on both feet- what injuries would you reasonably expect to find?
Idea here is to have participants take a second and look around and absorb the scene
Everyone should be aware of the risks associated with rendering First Aid.
While there are TONS of bugs, germs and nasties trying to kill us each day, the ones we need to focus on in the scope of first aid are the BLOODBORNE PATHOGENS, specifically HIV/AIDS and HEPATITIS.
AVOID CONTACT WITH BLOOD OR BODY FLUIDS BY BARE SKIN. INTACT SKIN PRESENTS A LOW RISK OF TRANSMISSION, NON-LATEX GLOVES OFFER A SUPERIOR BARRIER.
If NO GLOVES ARE PRESENT….SHAME ON YOU! ATTEMPT TO HAVE VICTIM/PATIENT PERFORM ALL CONTACT WITH BLOOD. IF NOT POSSIBLE, PLASTIC BAGS OR MANY DRESSINGS MAY SUBSITUTE, HOWEVER ARE NOT TRUE PROTECTION
SHOULD YOU RENDER FIRST AID AND GET BLOOD ON YOU: WASH ASAP. ALCOHOL BASED HAND WASHES ARE FANTASTIC!
MAKE CERTAIN THE AMBULANCE RESPONDERS ARE AWARE YOU MAY HAVE BEEN EXPOSED TO BLOOD. THEY SHOULD HELP YOU UNDERSTAND IF YOUR EXPOSURE WAS HIGH RISK, MEDIUM RISK/SIGNIFICANT, MEDIUM RISK INSIGNIFICANT OR LOW RISK/LOW SIGNIFICANCE
IF THERE IS A LAW ENFORCEMENT OFFICER(LEO) PRESENT WHO IS WRITING A REPORT, MAKE SURE BOTH THE LEO AND THE AMBULANCE CREW HAVE YOUR CONTACT INFORMATION. IF THERE HAS BEEN NO EXPOSURE, IT IS OPTIONAL TO GIVE YOUR INFORMATION.
AMBULANCE AND LEO SHOULD/MAY OFFER YOU TO GO TO THE ER FOR EVALUATION OF EXPOSURE (*MANY LEO/EMS ARE NOT FULLY UP TO SPEED ON THIS*) UNLESS THERE WAS A SIGNIFICANT OR HIGH RISK, ER VISIT PROBABLY UNECCESSARY.
HIGH RISK OR SIGNIFICANT EXPOSURE MEANS YOU SHOULD BEGIN PROPHYLACTIC TREATMENTS AS SOON AS POSSIBLE (LESS THAN 12 HOURS FROM EXPOSURE)
Need to keep the mood light!
NEVER a wrong answer to call 911!
On SJU Campus dialing 911 directs call to Life Safety Services. LSS is recognized by the county as a 911 Answering Point. Dialing 911 (or 2144) for on-campus emergencies will result in the quickest response to medical, fire or security/law enforcement emergencies.
At CSB- dial 9-911 to reach the Stearns County Dispatch Center. After giving them the desired information, hang up and dial CSB Security at XXXX.
CSB relies on EMS assets from St Joseph Fire Department, dialing 9-911 is necessary to initiate their response.
Out in the Real World…911 calls are Directed to the designated 911 Answering Service Point. These dispatch centers MAY offer advise or direction for emergency care prior to EMS Arrival
Skim over this stuff….
SJU averages- 1.5 mins for Advanced First Responder,ambulance 20mins
If any one cares: EMS varies greatly across the country. In Mn each municipality is responsible for providing EMS, Fire and Law Enforcement either directly or via contract for services. Industry standards use figures like “ a 12 minute ALS response 85% of the time” which allows for outliers when due to specific conditions or activities a response is significantly delayed.
TAKE HOME POINT….how long till help arrives….give them a realistic window of how long they need to be in the hot seat!
Quick list (not exhaustive) of whe to suspect spinal injury and NOT move the patient unless absolutely necessary
<number>
Give a brief overview of shock, keep it simple! Don’t worry about Blood Pressure numbers…
Try to describe how you feel…woozy, lightheaded…maybe get one of the students to describe who they’ve felt after an accident or injury.
Discuss treatments --- raise feet, nothing by mouth, blankets….treat before signs appear!
IF further wound care need and will be received in short order….then consider NOT cleaning the wound prior to regular medical care.
Wound cleaning only causes PAIN and can negatively effect would healing!
Note that tourniquets are SELDOM if NEVER used except in extreme conditions (major bleeding, long long ways from help)
A Tourniquet is sacrificing the limb to save the life.
Even with amputations, tourniquets are seldom needed! (bleeding is controlled by vascular spasm)
Significant means able to wiggle wound open enough to make like a mouth with it….find better words to describe this!
Talk about special types of wounds…and that wounds usually are parts of several general types.
Amputation care: cool moist container for lost part. Potential for reattachment up to 12-18 hours depending on the body part.
Puncture wounds: of particular concern for TETANUS. People still get very sick (and some die) in the US from tetanus! Tetanus boosters recommended every 5-7 years. Patients NOT of american birth are at higher risk due to lower rates of vaccination.
Avulsions: clean it best you can, drop the flap back down and bandage. Moist is better until further care is available.
OK Make ‘em feel smart! Let them list off the signs of infection!
two slides are examples of serious injuries…..first aid treatment is so similar for all of these…
Call EMS
Do not move unless necessary
ABCs
Treat for shock
If there is time you can make these into case studies.
Minimal treatment needed….
Actually treat very much like a burn, backwards! Gently warm, moist dressings (when it can be kept warm!)
Limit cold exposure to prevent compounding the injury.
Harbinger of further frostbite or hypothermia
More extreme…may be necessary to carry a person with frost bite this bad!
PAINFUL!
We don’t break blisters out of fear for infection….sterile needle or scalpel is ok then..try to save as much skin as possible for extra padding/protection.
Idea is to create window around blister to prevent rubbing. May take two layers of moleskin/padding to build up enough.
Treatments!
Soap and water! This is spread by oils….limit exposure! To closes. Plastic bag if possible. Creams are ok (and good thing to pack for back woods adventure)
Hydrocortisone over the counter- any anti-itch stuff is ok
Bandage to prevent irritation and scratching…and further involvement
More of same
EWWWWW!
DO NOT squeeze and remove!
Option a) let it fall out on it’s own!
Option b) smear Vaseline or antibiotic jelly on it…limits ability to interat with air (it’s head is in under the skin!)
Monitor for infection
Lymes disease discuss if you want!
Outside the scope of a basic first aid class. Often these extremely remote first aid scenarios are outside the scope of EMT and Paramedic classes!
(almost think of it as Third World medicine!)
We will give you decision making tools that ARE applicable. If you are really keen on back country trips, we recommend a Wilderness First Aid Course. HOWEVER- Minnesota does not recognize the training scope presented in many of these classes. You may be taught skills that you should not perform without being a part of a rescue system/team for training, quality assurance and medical oversight. (meant mostly to keep skills sharp and weed out the nut jobs who shouldn’t be allowed to put a band aid on a dog!)
Need to decide if waiting for a person to hike/drive out and bring help back is faster and more beneficial than carrying the person out. Adding to the equation is the injury you risk in moving, or the further deterioration from NOT moving.
Many factors to think about: how far to move, over what kind of terrain to carry over etc
Minor non-ambulatory injuries = best to wait (but moving probably will not hurt much –if stabilized adequately)
Shock from blood loss is a poor prognosis
Blanket stretchers etc more of a boyscout class now!
Not a happy place to be.
CPR= a good place to die sadly.