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dead-space

Page 4 of 5 · 110 questions tagged dead-space.

110 questions · sorted by votes · page 4 of 5

15 votes 5 answers26k views
What is the dead-space loss per draw with a 30G needle at 5 mg/mL?

Concretely: a 30G needle · 5 mg/mL. Please show the division. I want to check my own against yours. I would like the general form as well as the specific number, so I…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by dermot_kiely 14k · 21 months ago
15 votes 5 answers26k views
Is a 25G drawing needle the right choice for drawing oral semaglutide at 1 mg/mL?

The case in front of me: a 25G drawing needle · oral semaglutide · 1 mg/mL. I would like the axes of comparison first and the recommendation second. I have tried the…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by orla_ferriter 47k · 2.4 years ago
15 votes0 answers9k views
Is a 30G needle the right choice for drawing tirzepatide at 2.5 mg/mL?

Concretely: a 30G needle · tirzepatide · 2.5 mg/mL. These are treated as interchangeable and I do not think they are. If both are acceptable I would like to know…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by wren_calloway 14k · 2.2 years ago
15 votes 5 answers7.6k views
Is a 31G needle the right choice for drawing survodutide at 5 mg/mL?

The particulars: a 31G needle · survodutide · 5 mg/mL. The comparison I want does not seem to exist anywhere in a form I can evaluate. I have read the arguments for…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by samir_bennani 13k · 4 months ago
14 votes 5 answers27k views
Is a 31G needle the right choice for drawing retatrutide at 5 mg/mL?

Details up front: a 31G needle · retatrutide · 5 mg/mL. I want to know what the trade-off actually is rather than which option is fashionable. I would rather have a…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by eoin_mcgarry 16k · 2.0 years ago
14 votes5 answers16k views
What is the dead-space loss per draw with a 18G drawing needle at 10 mg/mL?

Details up front: an 18G drawing needle · 10 mg/mL. I can do the algebra. I am not confident about the conversion factors. If there is a standard way to lay this out,…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by lyoph_cake 95k · 10 months ago
14 votes0 answers16k views
Is a 18G drawing needle the right choice for drawing semaglutide at 20 mg/mL?

The specifics, since they change the answer: an 18G drawing needle · semaglutide · 20 mg/mL. I am trying to choose between two options that are usually discussed as…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by tare_weight 47k · 2.1 years ago
14 votes1 answer4.6k views
Why does a U-100 insulin syringe read differently from the volume I thought I drew at 2.5 mg/mL?

Details up front: a U-100 insulin syringe · 2.5 mg/mL. I have a result I cannot explain, and I would rather diagnose it than guess. I have checked the obvious…

insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by lukas_sedlacek 17k · 3 months ago
14 votes 5 answers3.9k views
Is a 27G needle the right choice for drawing cagrilintide at 6.67 mg/mL?

Stated plainly: a 27G needle · cagrilintide · 6.67 mg/mL. Both of these get recommended confidently by different people, which suggests neither is obviously right. My…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by plunger_stop 18k · 5 months ago
13 votes 5 answers8.3k views
What is the dead-space loss per draw with a 29G needle at 2.5 mg/mL?

For reference: a 29G needle · 2.5 mg/mL. I would like the arithmetic checked rather than the conclusion asserted. I have deliberately not used an online calculator…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by Dr_Otto_Lindqvist 38k · 8 months ago
13 votes0 answers8.2k views
Is a 27G needle the right choice for drawing mazdutide at 4 mg/mL?

Setup, so nobody has to ask: a 27G needle · mazdutide · 4 mg/mL. Both of these get recommended confidently by different people, which suggests neither is obviously…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by seamus_brady 17k · 2.1 years ago
13 votes 2 answers6.3k views
What is the dead-space loss per draw with a 29G needle at 6.67 mg/mL?

The specifics, since they change the answer: a 29G needle · 6.67 mg/mL. I would rather understand the derivation than memorise the outcome. Two people I asked gave…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by zeynep_arslan 20k · 4 months ago
12 votes 5 answers33k views
Is a 18G drawing needle the right choice for drawing dulaglutide at 20 mg/mL?

What I have: an 18G drawing needle · dulaglutide · 20 mg/mL. I want to know what the trade-off actually is rather than which option is fashionable. I would rather…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by one_ml_bac 12k · 2.2 years ago
12 votes 5 answers27k views
What is the dead-space loss per draw with a 27G needle at 3.33 mg/mL?

Concretely: a 27G needle · 3.33 mg/mL. Please show the division. I want to check my own against yours. I would like the general form as well as the specific number,…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by bridget_nyathi 16k · 18 months ago
12 votes 5 answers20k views
What is the dead-space loss per draw with a 18G drawing needle at 6.67 mg/mL?

The specifics, since they change the answer: an 18G drawing needle · 6.67 mg/mL. I would like the arithmetic checked rather than the conclusion asserted. I have…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by nkem_obiora 46k · 2.2 years ago
12 votes0 answers3.9k views
What is the dead-space loss per draw with a 25G drawing needle at 5 mg/mL?

Setup, so nobody has to ask: a 25G drawing needle · 5 mg/mL. I have worked this out and I would like someone to find the error, because I suspect there is one. My…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by amara_nwachukwu 41k · 11 months ago
11 votes 3 answers9.2k views
What is the dead-space loss per draw with a 25G drawing needle at 20 mg/mL?

What I am working with: a 25G drawing needle · 20 mg/mL. The units are where I keep going wrong, so please be explicit about them. I have sanity-checked the order of…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by mira_sundqvist 19k · 5 months ago
10 votes 5 answers13k views
Why does a 0.5 mL insulin syringe read differently from the volume I thought I drew at 5 mg/mL?

Conditions: a 0.5 mL insulin syringe · 5 mg/mL. I think I have a problem. I am not yet sure whether it is a real problem or a measurement artefact. I want to know…

insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by pascal_thibault 13k · 19 months ago
9 votes 5 answers13k views
Is a 18G drawing needle the right choice for drawing survodutide at 8 mg/mL?

For reference: an 18G drawing needle · survodutide · 8 mg/mL. I am trying to choose between two options that are usually discussed as though only one exists. I am not…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by oona_kekkonen 16k · 21 months ago
9 votes5 answers12k views
What is the dead-space loss per draw with a 29G needle at 4 mg/mL?

The specifics, since they change the answer: a 29G needle · 4 mg/mL. I would rather understand the derivation than memorise the outcome. Two people I asked gave two…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by leonid_marchuk 15k · 11 months ago
9 votes0 answers8.6k views
What is the dead-space loss per draw with a 31G needle at 6.67 mg/mL?

Details up front: a 31G needle · 6.67 mg/mL. This should be a straightforward calculation and I keep getting two different answers. The numbers are arbitrary; the…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by rune_thoresen 14k · 21 months ago
8 votes 5 answers15k views
Is a 25G drawing needle the right choice for drawing mazdutide at 6.67 mg/mL?

Setup, so nobody has to ask: a 25G drawing needle · mazdutide · 6.67 mg/mL. I suspect the honest answer is that it depends, in which case I would like to know on…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by helena_vidmar 18k · 9 months ago
8 votes0 answers7.3k views
What is the dead-space loss per draw with a 27G needle at 20 mg/mL?

Concretely: a 27G needle · 20 mg/mL. I want the working, not the result — I need to be able to redo it with different numbers. I care about the precision as well as…

dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
insulin-syringe
insulin-syringe

U-100 and U-40 insulin syringes as measuring instruments. A U-100 syringe is graduated in insulin units where 100 units equals 1 mL, so one unit…

268 questions
dosing-math
dosing-math

The arithmetic itself: milligrams to millilitres to insulin units, concentration after reconstitution, dose per draw, and vial-days per vial. Show…

811 questions
asked by cake_intact 18k · 2.3 years ago
7 votes 5 answers12k views
Is a 25G drawing needle the right choice for drawing tirzepatide at 10 mg/mL?

Conditions: a 25G drawing needle · tirzepatide · 10 mg/mL. I would like the axes of comparison first and the recommendation second. I have tried the first option and…

needle-gauge
needle-gauge

Gauge and length selection, the trade-off between draw time and tissue trauma, coring risk with larger-bore needles, and why a fixed-needle…

85 questions
injection-technique
injection-technique

Technique questions: angle, pinch versus flat, aspiration, injection speed, air bubbles, and the handling steps that determine whether you deliver…

90 questions
dead-space
dead-space

The volume trapped in the syringe hub and needle after the plunger bottoms out. It is small in absolute terms and large as a fraction of a small…

110 questions
asked by cal_hennessy 14k · 15 months ago